aqua International Journal 25(1)
Volume 25, Issue 1 – 25 January 2019
Volume 25, Issue 1 – 25 January 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
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.
Thodoros E. Kampouris, Francesco Tiralongo and Ioannis E. Batjakas: First record of Didogobius schlieweni Miller (Perciformes, Gobiidae) in Eastern Mediterranean Sea, pp. 13-16
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.
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
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.
Gerald R. Allen and Fenton Walsh: Tosanoides bennetti, a new species of anthiadiine fish (Pisces: Serranidae) from the Coral Sea, Australia, pp. 25-34
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.
Dalton Tavares Bressane Nielsen and Ricardo Britzke: 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, 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.