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quinquefasciata-lres
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SPECIAL XMAS OFFER on aquapress-bleher.com
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BIOTOPOS DE BLEHER
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Melanorivulus aithogrammus, a new miniature species (Cyprinodontiformes: Rivulidae) from lower Rio Tapajós basin, Brazil, with a key for the species of the Melanorivulus zygonectes species group
by Dalton Tavares Bressane Nielsen and Ricardo Britzke – aqua 25 (1) pp. 35-43
A new species of Melanorivulus, belonging to the Melanorivulus zygonectes species group, is described from the lower Rio Tapajós basin, Pará state, Brazil. Melanorivulus aithogrammus, new species, was recorded from a small tributary in the left bank of Rio Tapajós, Amazon basin. It differs from the other species of the Melanorivulus zygonectes species group by its color pattern in males, presenting sides of body light gray, with irregular oblique red bars, some in the shape of an inverted “Y”, caudal fin hyaline with 5-6 brownish-red vertical bars, and pointed anal fin. A key to the species belonging to the Melanorivulus zygonectes species group is presented.
The post Melanorivulus aithogrammus, a new miniature species (Cyprinodontiformes: Rivulidae) from lower Rio Tapajós basin, Brazil, with a key for the species of the Melanorivulus zygonectes species group appeared first on aqua, International Journal of Ichthyology.
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Tosanoides bennetti, a new species of anthiadiine fish (Pisces: Serranidae) from the Coral Sea, Australia
by Gerald R. Allen and Fenton Walsh – aqua 25 (1) – pp. 25-34
Abstract
Tosanoides bennetti is described from six specimens, 25.0-49.2 mm SL, collected from 141-150 m depth range at the Holmes Reefs, Coral Sea, which are situated approximately 220 km east of Cairns, Queensland, Australia. Diagnostic features include: dorsal rays X,17; anal rays III,8; pectoral rays 12-14; pored lateral line scales 29-33, either in continuous series or separated by gap of 1-3 transverse scale rows; gill rakers on the first branchial arch 7-10 + 23-26; body depth 2.7-2.8 in SL; male when freshly collected mainly lavender pink with four downward-slanting, yellow bands on head and body, middle two forming series of large irregularly-shaped spots; dorsal fin mainly yellow with narrow lavender outer margin and lavender basal portion, curling around posteriormost part of fin to join lavender outer margin; anal fin yellow except basal one-third and posteriormost rays lavender; caudal fin lavender with large yellow spot covering most of central portion of lower lobe; maximum known size to about 5 cm SL. The new taxon is most similar to T. annepatrice from Melanesia (Palau and Pohnpei), but differs with regards to male and female colour patterns and generally has shorter dorsal and anal-fin spines, a slightly more slender body, shorter snout, smaller eye, and shorter maxilla.
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Volume 24, Issue 4 – 05 November 2018
Volume 24, Issue 4 – 05 November 2018
New Scientific publication – started delivery on November 05, 2018
Jayasimhan Praveenraj, Arumugam Uma, John Daniel Marcus Knight, Nallathambi Moulitharan,
Shankar Balasubramanian, Kinattumkara Bineesh and Heiko Bleher: Channa quinquefasciata, a new speciesof snakehead (Teleostei: Channidae) from Torsa River, North Bengal, India, pp.141-152
Abstract
Channa quinquefasciata, a new species of snakehead from Torsa River, West Bengal, differs from all congeners by possessing a unique greyish to chrome-yellow body colour, with five black oblique bands horizontally along the upper half of the lateral body, dorsal-fin membrane with three rows of multiple black to brown oblong spots running horizontally along the whole fin length, and caudal-fin membrane alternating with <-shaped black spots arranged transversely. Genetically, the closest congener of C. quinquefasciata is C. stewartii from which it differs by K2-P sequence distance of 6.8-7.0%, and morphologically by the absence of numerous black spots on the flanks vs. presence, fewer dorsal-fin rays (33-35 vs. 38-40), fewer caudalfin rays (12 vs. 13), and fewer mid-row lateral-line scales (10-13 vs. 14-16).
Channa quinquefasciata, coloration of live specimens A. Lateral and dorsal view
Jayasimhan Praveenraj, Arumugam Uma, Nallathambi Moulitharan and Heiko Bleher: Channa bipuli, a new species of snakehead (Teleostei: Channidae) from Assam, northeast India, pp. 153-166
Abstract
Channa bipuli, a new species of colorful snakehead from Assam, Northeast India, is distinguished from all its congeners by possessing a unique bluish dorsum, 25-32 minute, well defined black spots on post-orbital region, inter-orbital region with fewer, dull black spots, lower jaw under-surface with minute black to brown spots, and numerous black spots on dorsum. Channa bipuli morphologically resembles C. pardalis described from West Khasi Hills, Meghalaya, however differs from the latter species by presenting caudalfin
rays devoid of transverse bands (vs. caudal-fin rays with brown transverse bands). It further differs in some osteological features, i.e., by presenting the fifth ceratobranchial slender with erect, canine-like teeth (vs. large inwardly, curved, conical teeth), and palatine elongated with five rows of teeth (vs. two rows of teeth). The genetic distance based on cox1 gene sequences between C. bipuli and C. pardalis is 4.2%, supporting the conclusion that both are distinct species.
Channa bipuli, female, 100.0 mm SL, uncatalogued aquarium specimen. Photo credits: Beta Mahatvaraj.
Hamed Mousavi-Sabet, Saber Vatandoust and Heiko Bleher: An updated checklist of fishes from the Iranian portion of the of Harirud/Tedzhen River basin, pp. 167-184
Abstract
The Harirud or Tedzhen River basin is an international endorheic basin at the border of Afghanistan, Iran and
Turkmenistan. The present article provides an updated checklist on fish fauna in the Iranian portion of the basin. The confirmed fish fauna comprises 27 species in 22 genera, 7 families, 5 orders, and one class. The most diverse family is the Cyprinidae with 19 species, followed by Nemacheilidae, with 3 species. Five families are represented by a single species. Sixteen species recorded from the Harirud River basin are exotic. Luciobarbus cf. capito is reported for the first time from the basin in Iran.
Map of the Harirud River basin, at the border of Afghanistan, Iran and Turkmenistan.
The post Volume 24, Issue 4 – 05 November 2018 appeared first on aqua, International Journal of Ichthyology.
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Volume 25, Issue 1 – 25 January 2019
Volume 25, Issue 1 – 25 January 2019
New Scientific publication – started delivery on January 28, 2019
Gerald R. Allen and Mark V. Erdman: Hoplolatilus andamanensis, a new species of sand tilefish (Pisces: Malacanthidae) from the Andaman Islands and confirmation of H. luteus as a junior synonym of H. fourmanoiri, pp. 1-12
Abstract
Hoplolatilus andamanensis is described on the basis of four specimens, 99.2-110.4 mm SL, collected at the Andaman Islands in the eastern Indian Ocean. The species was previously misidentified as H. luteus, a species that was originally described from a single specimen from Flores, Indonesia. Previous authors have debated the issue of whether H. luteus is a valid species or a junior synonym of H. fourmanoiri. Additional evidence in the form of underwater observations and collected specimens support the contention of Dooley & Jimenez that the two species are synonymous. The new species is closely related to H. fourmanoiri, but differs in scale morphology and coloration. It also usually has 11 dorsal spines versus a usual count of 10 spines in H. fourmanoiri. There is also a 1.5% divergence between the two species based on 16s ribosomal RNA sequence data.
Hoplolatilus andamanensis n. sp., underwater photograph of freshly captured (anesthetised) holotype, 110.4 mm SL, Andaman Islands. Photo by G. R. Allen.
Thodoros E. Kampouris, Francesco Tiralongo and Ioannis E. Batjakas: First record of Didogobius schlieweni Miller (Perciformes, Gobiidae) in Eastern Mediterranean Sea, pp. 13-16
Abstract
The present paper reports the first record of the very rare Mediterranean Didogobius schlieweni Miller in Greece. Furthermore, this record of D. schlieweni is the first from the Eastern Mediterranean basin. Based on the current record, it seems that D. schlieweni might have a wider distribution than previously thought. A summary of D. schlieweni records is provided.
The Didogobius schlieweni individual from Lavrio, western Aegean Sea and its microhabitat. Photo by P. Triantafillis.
Achom Darshan, Santoshkumar Abujam, Leki Wangchu, Ram Kumar, Debangshu Narayan Das and Raj Kumar Imotomba: A new species of glyptosternine catfish (Siluriformes: Sisoridae) from the Tawangchu River of Arunachal Pradesh, northeastern India, pp. 17-14
Abstract
Creteuchiloglanis tawangensis, a new glyptosternine catfish, is described from the Tawangchu River at Tawang district, a headwater of the Manas River, Brahmaputra basin in Arunachal Pradesh, India. The new species differs from all congeners in having an unique combination of the following characters: presence of pinnate-like rays on the anterior margin of the first branched ray of anal fin, pectoral fin not extending to the origin of pelvic fin, predorsal length 31.3-32.5% SL, body depth at anus 10.7-11.1% SL, caudal peduncle depth 6.4-6.8% SL, adipose-fin base length 33.2-33.8 % SL, pelvic fin length 19.5-20.5% SL, 2+8=10 gill rakers on the first branchial arch, head depth 9.1-10.0% SL, and eye diameter 5.8-6.9% HL. This is the fifth species of Creteuchiloglanis described from the Brahmaputra River basin.
Creteuchiloglanis tawangensis n. sp., RGUMF: 449, 152.0 mm SL, holotype, lateral view.
Gerald R. Allen and Fenton Walsh: Tosanoides bennetti, a new species of anthiadiine fish (Pisces: Serranidae) from the Coral Sea, Australia, pp. 25-34
Abstract
Tosanoides bennetti is described from six specimens, 25.0-49.2 mm SL, collected from 141-150 m depth range at the Holmes Reefs, Coral Sea, which are situated approximately 220 km east of Cairns, Queensland, Australia. Diagnostic features include: dorsal rays X,17; anal rays III,8; pectoral rays 12-14; pored lateral line scales 29-33, either in continuous series or separated by gap of 1-3 transverse scale rows; gill rakers on the first branchial arch 7-10 + 23-26; body depth 2.7-2.8 in SL; male when freshly collected mainly lavender pink with four downward-slanting, yellow bands on head and body, middle two forming series of large irregularly-shaped spots; dorsal fin mainly yellow with narrow lavender outer margin and lavender basal portion, curling around posteriormost part of fin to join lavender outer margin; anal fin yellow except basal one-third and posteriormost rays lavender; caudal fin lavender with large yellow spot covering most of central portion of lower lobe; maximum known size to about 5 cm SL. The new taxon is most similar to T. annepatrice from Melanesia (Palau and Pohnpei), but differs with regards to male and female colour patterns and generally has shorter dorsal and anal-fin spines, a slightly more slender body, shorter snout, smaller eye, and shorter maxilla.
Tosanoides bennetti, n. sp., freshly collected male holotype (QM I.40881), 48.1 mm SL, Holmes Reefs, Coral Sea. Photo by F. Walsh.
Dalton Tavares Bressane Nielsen and Ricardo Britzke: Melanorivulus aithogrammus, a new miniature species (Cyprinodontiformes: Brazil) from lower Rio Tapajós basin, Brazil, with a key for the species of the Melanorivulus zygonectes species group, pp. 35-43
A new species of Melanorivulus, belonging to the Melanorivulus zygonectes species group, is described from the lower Rio Tapajós basin, Pará state, Brazil. Melanorivulus aithogrammus, new species, was recorded from a small tributary in the left bank of Rio Tapajós, Amazon basin. It differs from the other species of the Melanorivulus zygonectes species group by its color pattern in males, presenting sides of body light gray, with irregular oblique red bars, some in the shape of an inverted “Y”, caudal fin hyaline with 5-6 brownish-red vertical bars, and pointed anal fin. A key to the species belonging to the Melanorivulus zygonectes species group is presented.
Melanorivulus aithogrammus, MZUSP 123088, holotype, male, 28.0 mm SL. Photo by R. Britzke.
The post Volume 25, Issue 1 – 25 January 2019 appeared first on aqua, International Journal of Ichthyology.
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In Memoriam Dr. Renny K. Hadiaty (1960-2019)
The ichthyological community is saddened by the death of our Indonesian colleague, Renny K. Hadiaty, who passed away after battling cancer on 30 January 2019. Renny was passionate about the freshwater fish fauna of her native land and worked tirelessly to promote it in a variety of ways that included mentoring young students, editorial duties and helping researchers to access the important collections in her care at the LIPI Biology Research Center at Cibinong, Java. She was also a prolific author, frequently collaborating with international researchers. Renny was a member of the team that described the Indonesian coelacanth (Latimeria manadoensis) in 1999, which was her second publication. Starting in 1998, she published 55 taxonomic papers, containing descriptions of 71 new species that appeared in peer-reviewed journals of Australia, France, Germany, Italy, New Zealand, Singapore, the UK, and the USA. Renny was a tireless field worker, making frequent collecting trips around the Archipelago from Sumatra to New Guinea. I had the pleasure of joining her on three of these, including a visit to West Papua in 2010 and two trips to the Aru Islands during 2016. She was the perfect field companion – always smiling, well organized, and doing more than her share of the work without complaining. Highly energetic and always striving to advance her skills and knowledge, Renny, who was well into her 40s, successfully embarked on a doctoral program at the University of the Ryukyus in Japan.
I’m sure all of the overseas researchers that visited her lab at Cibinong would agree that she went above and beyond the call of duty to make everyone feel welcome. This included arranging lodging and transport, and especially the endless snacks of Indonesian delicacies supplied each day, not to mention stimulating discussions. Perhaps Renny’s biggest accomplishment may be one that many people do not realize – her role as a devoted wife and mother to her husband Elistyo Sritaman, sons Arief Aditya Hutama and M. Baiquni Bramantyo, and daughter Rani Puri Permata. Renny will be greatly missed by everyone who knew her, but the family’s loss is unfathomable and we extend our deepest condolences.
CV of Renny from office file: Renny Kurnia Hadiaty was born in Malang, East Java on 21th August 1960. She got her Undergraduate degree in 1985 with Biology major from The University of General Soedirman, Purwokerto, Central Java. After graduated she joined Division of Zoology (known also as Museum Zoologicum Bogoriense), Research Center for Biology, Indonesian Institute of Sciences in 1986. Since then she was active doing working on various families of Indonesian freshwater fishes in the laboratory of Ichtyology. In 2014, she got her DSc from The University of the Ryukyus, Japan.
Renny was also one of the members who established (“founding father”?) “Masyarakat Iktiologi Indonesia” (or MII = Indonesian Ichthyological Society), a professional ichthyological society in Indonesia. She was the Vice Chairman of the Central Management of the Indonesian Ichthyological Society for 2018-2022 period.
She was involved in many research collaborations with ichthyologists from Australia, Indonesia, Singapore, Japan, Swiss, Germany, France, The United Kingdom, and The United States of America (these are what I remember).
Renny and Daisy did many (around 30) field works together, from 2006 till August 2018 before Renny took 3 months leave due to her sickness. We went to many places in Indonesia with our colleagues and foreign counterparts. Definitely we had prolific and good time in the fields. Some fishes that caught into my net turned out to become several new fish species. It was a pleasure and honoured to me that the fish specimens were helpful for Renny to reveal the biodiversity of Indonesian freshwater fish. On the other hand, she also collected some crustacean specimens for me which I am very grateful. Renny was one of my best colleagues and friends whom I am miss.
Gerald R. Allen
The post In Memoriam Dr. Renny K. Hadiaty (1960-2019) appeared first on aqua, International Journal of Ichthyology.
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PETSFESTIVAL 2019 & DISCUS CONTEST
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25-3_cover_160
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25-3_cover_240
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AQUA 25-3.qxp_AQUA
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25-3_cover
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25-3_Nothobranchiusderhami
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Alestion
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Moenafunkneri
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Nothobranchius derhami, a new species of seasonal killifish from western Kenya
by Stefano Valdesalici and Giuseppe Amato – aqua 25 (3) – pp. 111-124
Abstract
Nothobranchius derhami, new species, is described from seasonal habitats in the Nyando River system, belonging to the Lake Victoria basin, western Kenya. Nothobranchius derhami belongs to the N. ugandensis species group and is distinguished from all other members of the genus by the following characters in males: flank light blue with red scale margins; dorsal portion of the head red, lower jaw light blue; caudal fin plain red; pectoral fin hyaline; anal fin light blue proximally to creamy white distally, with series of red dots; dorsal fin almost red proximally with few white to light blue dots, subdistal white to light blue stripe; dorsal fin with black margin, anal fin with dark red to black margin, 15-17 dorsal and anal fin rays, 27-29 scales in the median lateral series, 10-12 transverse scale rows, and 14-16 circumpeduncular scales. In view of the very restricted distribution of N. derhami, it is suggested that its conservation status according to the IUCN Red List of Threatened Species guidelines would be Vulnerable (D2).
The post Nothobranchius derhami, a new species of seasonal killifish from western Kenya appeared first on aqua, International Journal of Ichthyology.
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Volume 25, Issue 3 – 30 July 2019
Volume 25, Issue 3 – 30 July 2019
New Scientific publication – started delivery on July 30, 2019
Tyson R. Roberts: Alestion rapax¸ a new genus and species of miniature paedomorphic characiform fish with large conical teeth from the Lower Congo basin (Ostariophysi, Alestidae), pp. 82-102
Abstract
Alestion rapax, an entomophagous new genus and species of Alestidae, scaleless and largely translucent in life, possibly most closely related to Hydrocynus, is described from nine reproductively inactive specimens 12.0-16.8 mm standard length collected from a single locality in the Kwilu drainage near Moerbeke in the lower Congo basin in 1973. Eye large, body elongate and laterally strongly compressed. A number of its characters, such as a midventral fin fold, partly actinotrichous pectoral and caudal-fin rays, lack of scales and adipose eyelid may be neotenic or paedomorphic, while others are highly specialized. Circumorbital bones, including antorbital and lacrimal, absent. Dorsal-fin rays 10, its base entirely posterior to vertical through end of pelvic-fin base (dorsal fin rays usually 10 in Hydrocynus, its dorsal fin base above pelvic-fin base, its dorsal fin origin in front of or above vertical through pelvic fin origin). Anal-fin rays 14 (15-18 in Hydrocynus). Vertebrae 25-26+13-14=39-40 (versus 29-36+15-18=45-54 in Hydrocynus). Mouth slightly upturned, lower jaw with a large fleshy mentum. Apparently two rows of enlarged conical teeth on premaxillary near symphysis of jaws (nearly forming a single row) and two rows of somewhat larger teeth on dentary near symphysis. Outer row of dentary with three teeth and inner row with a single tooth as in alestids with multicupsid jaw teeth generally. Tooth replacement alternating from side to side of the jaw as in alestids and many neotropical characins having complex multicuspid teeth. Premaxillary of largest specimen with a single tricuspid replacement tooth, its small secondary cusps subapical (rather than basal, as in tricuspid teeth of very small Hydrocynus). Feeds on small aquatic insect larvae of the dipteran family Chironomidae.
Alestion rapax. a) 13.9 mm, drawing of lateral view of skeleton and internal organs (pyloric caecae not shown), vertebrae 26+14=40; b) 16.8 mm, photograph of lateral view of cleared and stained specimen, vertebrae 26+14=40.
Stefano Valdesalici: A new annual killifish: Moema funkneri (Cyprinodontiformes: Rivulidae) from the Bolivian Amazon, pp. 103-110
Abstract
A new annual killifish species, Moema funkneri, is described from a seasonal pool in the Río Grande drainage, a tributary of Río Mamoré, Amazon basin, Bolivia. The new taxon is similar to M. heterostigma and M. ortegai/M. quiii by males possess oblique rows of red brown dots on flanks. It differs from all known congeners by the combination of the aforementioned color pattern, short pectoral fins, presence of almost dark yellow anal fin, broad orange margin on ventral and posterior portions of caudal fin, and a relatively high number of scales in the lateral line, transverse series, and circumpeduncular series.
Moema funkneri, MSNG 61241, male, holotype, 102.3 mm SL: Bolivia, seasonal pool in the Río Grande drainage. Photo by S. Valdesalici.
Stefano Valdesalici and Giuseppe Amato: Nothobranchius derhami (Cyprinodontiformes: Nothobranchiidae), a new species of seasonal killifish from western Kenya, pp. 111-124
Abstract
Nothobranchius derhami, new species, is described from seasonal habitats in the Nyando River system, belonging to the Lake Victoria basin, western Kenya. Nothobranchius derhami belongs to the N. ugandensis species group and is distinguished from all other members of the genus by the following characters in males: flank light blue with red scale margins; dorsal portion of the head red, lower jaw light blue; caudal fin plain red; pectoral fin hyaline; anal fin light blue proximally to creamy white distally, with series of red dots; dorsal fin almost red proximally with few white to light blue dots, subdistal white to light blue stripe; dorsal fin with black margin, anal fin with dark red to black margin, 15-17 dorsal and anal fin rays, 27-29 scales in the median lateral series, 10-12 transverse scale rows, and 14-16 circumpeduncular scales. In view of the very restricted distribution of N. derhami, it is suggested that its conservation status according to the IUCN Red List of Threatened Species guidelines would be Vulnerable (D2).
Nothobranchius derhami, topotypical male, about 35 mm SL, not preserved; Kenya: temporary ditch associated with Nyando River floodplain, Lake Victoria basin. Photo by S. Valdesalici
The post Volume 25, Issue 3 – 30 July 2019 appeared first on aqua, International Journal of Ichthyology.
↧
In Memoriam Dr. Renny K. Hadiaty (1960-2019)
The ichthyological community is saddened by the death of our Indonesian colleague, Renny K. Hadiaty, who passed away after battling cancer on 30 January 2019. Renny was passionate about the freshwater fish fauna of her native land and worked tirelessly to promote it in a variety of ways that included mentoring young students, editorial duties and helping researchers to access the important collections in her care at the LIPI Biology Research Center at Cibinong, Java. She was also a prolific author, frequently collaborating with international researchers. Renny was a member of the team that described the Indonesian coelacanth (Latimeria manadoensis) in 1999, which was her second publication. Starting in 1998, she published 55 taxonomic papers, containing descriptions of 71 new species that appeared in peer-reviewed journals of Australia, France, Germany, Italy, New Zealand, Singapore, the UK, and the USA. Renny was a tireless field worker, making frequent collecting trips around the Archipelago from Sumatra to New Guinea. I had the pleasure of joining her on three of these, including a visit to West Papua in 2010 and two trips to the Aru Islands during 2016. She was the perfect field companion – always smiling, well organized, and doing more than her share of the work without complaining. Highly energetic and always striving to advance her skills and knowledge, Renny, who was well into her 40s, successfully embarked on a doctoral program at the University of the Ryukyus in Japan.
I’m sure all of the overseas researchers that visited her lab at Cibinong would agree that she went above and beyond the call of duty to make everyone feel welcome. This included arranging lodging and transport, and especially the endless snacks of Indonesian delicacies supplied each day, not to mention stimulating discussions. Perhaps Renny’s biggest accomplishment may be one that many people do not realize – her role as a devoted wife and mother to her husband Elistyo Sritaman, sons Arief Aditya Hutama and M. Baiquni Bramantyo, and daughter Rani Puri Permata. Renny will be greatly missed by everyone who knew her, but the family’s loss is unfathomable and we extend our deepest condolences.
CV of Renny from office file: Renny Kurnia Hadiaty was born in Malang, East Java on 21th August 1960. She got her Undergraduate degree in 1985 with Biology major from The University of General Soedirman, Purwokerto, Central Java. After graduated she joined Division of Zoology (known also as Museum Zoologicum Bogoriense), Research Center for Biology, Indonesian Institute of Sciences in 1986. Since then she was active doing working on various families of Indonesian freshwater fishes in the laboratory of Ichtyology. In 2014, she got her DSc from The University of the Ryukyus, Japan.
Renny was also one of the members who established (“founding father”?) “Masyarakat Iktiologi Indonesia” (or MII = Indonesian Ichthyological Society), a professional ichthyological society in Indonesia. She was the Vice Chairman of the Central Management of the Indonesian Ichthyological Society for 2018-2022 period.
She was involved in many research collaborations with ichthyologists from Australia, Indonesia, Singapore, Japan, Swiss, Germany, France, The United Kingdom, and The United States of America (these are what I remember).
Renny and Daisy did many (around 30) field works together, from 2006 till August 2018 before Renny took 3 months leave due to her sickness. We went to many places in Indonesia with our colleagues and foreign counterparts. Definitely we had prolific and good time in the fields. Some fishes that caught into my net turned out to become several new fish species. It was a pleasure and honoured to me that the fish specimens were helpful for Renny to reveal the biodiversity of Indonesian freshwater fish. On the other hand, she also collected some crustacean specimens for me which I am very grateful. Renny was one of my best colleagues and friends whom I am miss.
Gerald R. Allen
The post In Memoriam Dr. Renny K. Hadiaty (1960-2019) appeared first on aqua, International Journal of Ichthyology.
↧
Volume 25, Issue 3 – 30 July 2019
Volume 25, Issue 3 – 30 July 2019
New Scientific publication – started delivery on July 30, 2019
Tyson R. Roberts: Alestion rapax¸ a new genus and species of miniature paedomorphic characiform fish with large conical teeth from the Lower Congo basin (Ostariophysi, Alestidae), pp. 82-102
Abstract
Alestion rapax, an entomophagous new genus and species of Alestidae, scaleless and largely translucent in life, possibly most closely related to Hydrocynus, is described from nine reproductively inactive specimens 12.0-16.8 mm standard length collected from a single locality in the Kwilu drainage near Moerbeke in the lower Congo basin in 1973. Eye large, body elongate and laterally strongly compressed. A number of its characters, such as a midventral fin fold, partly actinotrichous pectoral and caudal-fin rays, lack of scales and adipose eyelid may be neotenic or paedomorphic, while others are highly specialized. Circumorbital bones, including antorbital and lacrimal, absent. Dorsal-fin rays 10, its base entirely posterior to vertical through end of pelvic-fin base (dorsal fin rays usually 10 in Hydrocynus, its dorsal fin base above pelvic-fin base, its dorsal fin origin in front of or above vertical through pelvic fin origin). Anal-fin rays 14 (15-18 in Hydrocynus). Vertebrae 25-26+13-14=39-40 (versus 29-36+15-18=45-54 in Hydrocynus). Mouth slightly upturned, lower jaw with a large fleshy mentum. Apparently two rows of enlarged conical teeth on premaxillary near symphysis of jaws (nearly forming a single row) and two rows of somewhat larger teeth on dentary near symphysis. Outer row of dentary with three teeth and inner row with a single tooth as in alestids with multicupsid jaw teeth generally. Tooth replacement alternating from side to side of the jaw as in alestids and many neotropical characins having complex multicuspid teeth. Premaxillary of largest specimen with a single tricuspid replacement tooth, its small secondary cusps subapical (rather than basal, as in tricuspid teeth of very small Hydrocynus). Feeds on small aquatic insect larvae of the dipteran family Chironomidae.
Alestion rapax. a) 13.9 mm, drawing of lateral view of skeleton and internal organs (pyloric caecae not shown), vertebrae 26+14=40; b) 16.8 mm, photograph of lateral view of cleared and stained specimen, vertebrae 26+14=40.
Stefano Valdesalici: A new annual killifish: Moema funkneri (Cyprinodontiformes: Rivulidae) from the Bolivian Amazon, pp. 103-110
Abstract
A new annual killifish species, Moema funkneri, is described from a seasonal pool in the Río Grande drainage, a tributary of Río Mamoré, Amazon basin, Bolivia. The new taxon is similar to M. heterostigma and M. ortegai/M. quiii by males possess oblique rows of red brown dots on flanks. It differs from all known congeners by the combination of the aforementioned color pattern, short pectoral fins, presence of almost dark yellow anal fin, broad orange margin on ventral and posterior portions of caudal fin, and a relatively high number of scales in the lateral line, transverse series, and circumpeduncular series.
Moema funkneri, MSNG 61241, male, holotype, 102.3 mm SL: Bolivia, seasonal pool in the Río Grande drainage. Photo by S. Valdesalici.
Stefano Valdesalici and Giuseppe Amato: Nothobranchius derhami (Cyprinodontiformes: Nothobranchiidae), a new species of seasonal killifish from western Kenya, pp. 111-124
Abstract
Nothobranchius derhami, new species, is described from seasonal habitats in the Nyando River system, belonging to the Lake Victoria basin, western Kenya. Nothobranchius derhami belongs to the N. ugandensis species group and is distinguished from all other members of the genus by the following characters in males: flank light blue with red scale margins; dorsal portion of the head red, lower jaw light blue; caudal fin plain red; pectoral fin hyaline; anal fin light blue proximally to creamy white distally, with series of red dots; dorsal fin almost red proximally with few white to light blue dots, subdistal white to light blue stripe; dorsal fin with black margin, anal fin with dark red to black margin, 15-17 dorsal and anal fin rays, 27-29 scales in the median lateral series, 10-12 transverse scale rows, and 14-16 circumpeduncular scales. In view of the very restricted distribution of N. derhami, it is suggested that its conservation status according to the IUCN Red List of Threatened Species guidelines would be Vulnerable (D2).
Nothobranchius derhami, topotypical male, about 35 mm SL, not preserved; Kenya: temporary ditch associated with Nyando River floodplain, Lake Victoria basin. Photo by S. Valdesalici
The post Volume 25, Issue 3 – 30 July 2019 appeared first on aqua, International Journal of Ichthyology.
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