by Gerald R. Allen, Mark V. Erdmann and Ni Putu Dian Pertiwi – aqua 28 (1) pp. 1-26 Three new species of Pomacentrus, allied to P. philippinus, are described from the eastern Indian and western Pacific oceans. The current study, our third dealing with the P. philippinus group of species, concludes that it contains at least 10 allopatric species, which are mainly separable on the basis of colour pattern, slight meristic differences, and in most cases, mitochondrial DNA (mtDNA) evidence. Pomacentrus umbratilus n. sp. is described on the basis of 27 specimens, 15.0-80.5 mm SL from the East Andama ..read more

by Dalton Tavares Bressane Nielsen, Jan Willem Hoetmer and Eric Vandekerkhove – aqua 28 (1) pp. 37-43 A new species of Laimosemion, belonging to the subgenus Owiyeye, is described: Laimosemion anitae n. sp. from the Rio Juruá, Amazon basin, Brazil. The new species differs from the other species of the group by an unique color pattern in males: overall background color of trunk and head orange-brown, sides of body with brown background and 4 thin light blue stripes from opecular region to the caudal peduncle. Laimosemion anitae is hypothesized to be closely related to L. leticia and L. ubim by ..read more

Volume 28, Issue 1 – 28 February 2022 New Scientific publication – started delivery on February 28, 2022 Full Text | PDF (985 KB) Gerald R. Allen, Mark V. Erdmann and Ni Putu Dian Pertiwi: Description of three new species of damselfish belonging to the Pomacentrus philippinus group (Pomacentridae) from Melanesia and the eastern and central Indian Ocean, pp. 1-26 Abstract Three new species of Pomacentrus, allied to P. philippinus, are described from the eastern Indian and western Pacific oceans. The current study, our third dealing with the P. philippinus group of species, concludes that it con ..read more

Volume 27, Issue 3 – 30 September 2021 New Scientific publication – started delivery on September 30, 2021 Full Text | PDF (1,1 MB) Santoshkumar Abujam, Budhin Gogoi, Arup Nama Das, Debangshu Narayan Das & Shyama Prasad Biswas: Esomus nimasowi, a new species of flying barb (Cypriniformes: Danionidae) from Assam, north-eastern India, pp. 81-92 Abstract Esomus nimasowi, a new species of flying barb, is described from the Phongloso stream (a small tributary of the Kopili River) at Wasubil village in Dima Hasao district, Assam north-eastern India. The new species differs from its congeners inc ..read more

Volume 27, Issue 2 – 31 May 2021 New Scientific publication – started delivery on June 03, 2021 Full Text | PDF (1,3 MB) Gerald R. Allen and Mark V. Erdmann: Description of two new sand-dwelling gobies (Gobiidae: Hazeus) from the tropical western Pacific Ocean, pp. 37-56 Abstract Two new species belonging to the gobiid genus Hazeus are described from sand-bottom habitats in the tropical western Pacific. Hazeus ammophilus n. sp. is described on the basis of 54 specimens, 11.6-33.4 mm SL from Papua New Guinea (Milne Bay Province) and Indonesia (West Papua Province and Anambas Islands, South Chin ..read more

by Tyson R. Roberts – aqua 27 (3) pp. 103-112 The new species Megaleporinus prochiloides is based on an uncatalogued adult specimen from eastern Bolivia but otherwise without locality data in the teaching collection of the fish collection of the Museo de Historia Natural Noel Mercado Kempf in Santa Cruz, Bolivia (MNKP). It differs from all other species of Megaleporinus in having greatly enlarged mouth and lips strongly resembling those in Prochilodus and Ichthyoelephas. Its linearly striped coloration also occurs in all species of these genera without other distinctive coloration or marks on ..read more

by Santoshkumar Abujam, Budhin Gogoi, Arup Nama Das, Debangshu Narayan Das & Shyama Prasad Biswas – aqua 27 (3) pp. 81-92 Esomus nimasowi, a new species of flying barb, is described from the Phongloso stream (a small tributary of the Kopili River) at Wasubil village in Dima Hasao district, Assam north-eastern India. The new species differs from its congeners including Esomus danrica, Esomus bengalensis and Esomus thermoicos in having a shorter maxillary barbel just reach 1/3rd of pectoral-fin length (vs. maxillary barbel very long, extending to mid of pectorals or ventral fin insertion or ..read more

by Gerald R. Allen and Mark V. Erdmann – aqua 27 (2) pp. 37-56 Two new species belonging to the gobiid genus Hazeus are described from sand-bottom habitats in the tropical western Pacific. Hazeus ammophilus n. sp. is described on the basis of 54 specimens, 11.6-33.4 mm SL from Papua New Guinea (Milne Bay Province) and Indonesia (West Papua Province and Anambas Islands, South China Sea). It also ranges to the Philippines and southern Japan, based on underwater photographs. Diagnostic features include: third or fourth dorsal spine longest, segmented dorsal and anal rays usually 10 (som ..read more

Volume 27, Issue 1 – 22 March 2021 New Scientific publication – started delivery on March 28, 2021 Full Text | PDF (1 MB) Tyson R. Roberts: Glyptothorax pedunculatus, a New Species of Sumatran Sisorid Catfish with Slender Caudal Peduncle and Simple Thoracic Adhesive Organ, pp. 1-4 Abstract Glyptothorax pedunculatus new species is described from the Musi River basin in central Sumatra. It differs from all other species in the genus by its more slender caudal peduncle and by its thoracic adhesive organ lacking a median groove and with nearly straight striae. Ten species of Glyptothorax are now k ..read more

Volume 26, Issue 3-4 – 30 November 2020 New Scientific publication – started delivery on December 01, 2020 Full Text | PDF (1,8 MB) Tyson R. Roberts: Two new species of the spiny percheel genus Mastacembelus (Synbranchiformes, Mastacembelidae) with low numbers of dorsal fin spines from the Congo basin, pp. 69-76 Abstract Two new species of African Mastacembelus are described with unusually low counts of dorsal fin spines. Until now the African species of spiny eels with the fewest dorsal fin spines are M. paucispinis Boulenger 1899, from mainstream rapids of the Lower Congo River, with 6-10 do ..read more