Volume 20, issue 2 – 15 April 2014
Volume 20, Issue 2 – 15 April 2014
John E. Randall: The goatfishes Parupeneus cyclostomus, P. macronemus and freeloaders, pp. 61-66
The Indo-Pacific goatfishes Parupeneus cyclostomus and P. macronemus feed over sand like other mullid fishes, thrusting the pair of sensory barbels on the chin into sand to reveal the usual prey of small crustaceans, polychaetes, and sipunculids. They are unusual for goatfishes in foraging as well over reefs, flicking their exceptionally long barbels into reef interstices, and flushing prey (mainly small fishes) into the open. Food-habit studies show P. cyclostomus to be mainly a predator on fishes, and comparable research is expected to prove the same for P. macronemus. Both species are often seen in cooperative feeding aggregations of their own kind moving over reefs. Both are often closely followed by other efficient fish predators, especially carangids, the larger labrids, and serranids, to take advantage of the goatfish’s skill in exposing prey. Other species are listed whose disruptive feeding on reefs attracts a variety of predaceous fishes.
Parupeneus cyclostomus, male, Maui. Photo by J. E. Randall
Yazdan Keivany and Hamid Reza Esmaeili: Threatened fishes of the world: Aphanius pluristriatus (Jenkins 1910) (Cyprinodontidae), pp. 67-72
The systematics, morphology and biology of an endemic fish, the Mond tooth-carp, Aphanius pluristriatus (Jenkins 1910) (Cyprinodontidae) are summarized. A. pluristriatus is a poorly known species from Fasa, located in the Mond River drainage system (Bushehr Basin). This fish is not listed in IUCN’s Red Data Book, but it should be included due to criteria such as restricted distribution, destruction of spawning grounds and environmental pollution. Since its first description, its validity has been questioned and a synonymy with A. sophiae (Heckel, 1849) has been suggested. For this reason, its biology has been neglected. However, recently, its validity was confirmed. In this study, the limited data on this fish and its threats are summarized and discussed.
Aphanius pluristriatus, male, in an aquarium. Photo by H. R. Esmaeili
Achom Darshan, Rashmi Dutta, Akash Kachari, Budhin Gogoi, Kamhun Aran and Debangshu Narayan Das: Creteuchiloglanis payjab, a new species of glyptosternine catfish (Siluriformes: Sisoridae) from Yomgo River, Arunachal Pradesh, India, pp. 73-80
Creteuchiloglanis payjab, a new glyptosternine catfish, is described from the Yomgo River at Mechuka, a tributary of the Siang River, Brahmaputra basin, Arunachal Pradesh, India. It differs from all congeners in having a unique combination of the following characters: head and body with milk-white and pale yellow patches, head depth 10.2-12.3% SL, body depth at dorsal origin 11.4-13.0% SL, predorsal length 30.4-33.5% SL, prepectoral length 16.8-20.5% SL, pectoral-fin length 23.5-25.8% SL, small anal fin (anal-fin length 11.8-13.4% SL, anal-fin base length 4.2-5.6% SL), adipose-fin base length 28.8-31.9% SL, and caudal-peduncle depth 6.1-6.9% SL. This is the second species of Creteuchiloglanis reported from the Brahmaputra River basin.
Creteuchiloglanis payjab n. sp., holotype, RGUMF 0249, 172.2 mm SL: (a) dorsal, (b) lateral and (c) ventral views. India: Arunachal Pradesh: Yomgo River at Mechuka. Photos by R. Dutta.
Gerald R. Allen, Teguh Peristiwady and Mark V. Erdmann: Vanderhorstia lepidobucca, a new specie of shrimpgoby from Sulawesi, Indonesia, pp. 81-86
A new species of gobiid fish, Vanderhorstia lepidobucca, is described from Lembeh Strait, North Sulawesi, Indonesia on the basis of eight specimens, 23.5-40.4 mm SL. The new taxon is the only member of the genus possessing scales on the preoperculum (cheek) and also three scales on the upper anterior corner of the operculum. Other diagnostic features include 13 dorsal soft rays, 14 anal soft rays, first dorsal fin relatively short with no elongate rays, 51-55 longitudinal scales, 17-18 predorsal scales, and a lanceolate caudal fin. The head and body are generally light brown with yellow vermiculated bands on the head, prominent yellow and blue-margined black spot on the middle of the operculum, and about 16-18 short brown bars along the middle of the body. The median fins are generally bluish with yellow spots, stripes, or streaks, except the anal fin is mainly yellow with blue on the distal third.
Underwater photograph of live Vanderhorstia lepidobucca, male paratype (WAM P.33940-001), 37.6 mm SL, Lembeh Strait, North Sulawesi, Indonesia. Photo by M. V. Erdmann.
Dalton Tavares Bressane Nielsen, Mayler Martins and Ricardo Britzke: Description of a new species of annual fish, Maratecoara gesmonei (Cyprinodontiformes: Rivulidae) from the rio Xingu system, Amazon basin, Brazil, pp. 87-96
Maratecoara gesmonei n. sp., found on a temporary pool at a fluvial island in the middle rio Xingu, Pará State, Brazil, is described herein. This is the first occurrence of this genus in the Rio Xingu drainage, Amazon basin. The new species differs from all congeners by its unique color pattern which lacks horizontal rows of small dark orange spots on the antero-dorsal portion of the flanks (vs. 2-3 on M. lacortei, 3 on M. formosa and M. splendida), or orange oblique bars on anteroventral portion of trunk (vs. 4-5 orange oblique bars on anteroventral portion of trunk in M. formosa, 3-4 in M. splendida or a broad blotch in M. lacortei). In addition, the new species can be diagnosed from congeners by its lower body depth (23.7-25.9% SL vs. 30.4-40.0% SL), lower caudal peduncle depth (13.0-15.5% SL vs. 17.1-21.6% SL), and lower number of vertebrae, 25-26 (vs. 27-28 in M. lacortei, 26-27 in M. formosa, and 27 in M. splendida).
Maratecoara gesmonei, ZUEC 7851, holotype, male, 23.4 mm SL. Photo by M. Martins.
Gerald R. Allen and Renny K. Hadiaty: Two new species of freshwater gudgeons (Eleotridae: Mogurnda) from the Arguni Bay Region of West Papua, Indonesia, pp. 97-110
Two new species of Mogurnda are described from the Arguni Bay region of West Papua, Indonesia. Mogurnda arguni, new species is described from 80 specimens, 17.5-92.1 mm SL, collected from a small tributary of the Togarni River in the northeastern reaches of the Arguni Bay drainage. It is most similar to M. magna from the Triton Lakes (lying about 80 km southeast) and M. mbuta, from the Etna Bay region (about 120 km southeast). The main differences consist of a smaller head, longer pelvic fins, longer caudal fin, fewer predorsal scales and a much smaller size in M. arguni in comparison with M. magna. Most of these differences are also shared with M. mbuta, which exhibits pronounced modal differences in number of pectoral-fin rays (78% with 16 rays vs. 48% in M. arguni) and slightly higher number of rakers on the lower limb of the first gill arch. Mogurnda kaimana, new species is described from 38 specimens, 11.5-110.2 mm SL, collected from Lake Furnusu, a small mountain lake 15 km northeast of Kaimana. It is most similar to M. pardalis from the Triton Lakes but differs in lateral and predorsal scale counts, body depth, head length, interorbital width, pelvic-fin length, and caudal-peduncle length. In addition, preserved specimens of M. kaimana are uniformly dark compared to the lighter mottled pattern of M. pardalis.
Head of Mogurnda arguni (paratype, 75.8 mm SL) with tracts of cephalic sensory pores shown by white lines. Photo by G. R. Allen.
Stefano Valdesalici and Wolfgang Eberl: Aphyosemion mengilai, a new killifish species from the northern Massif du Chaillu, central Gabon (Cyprinodontiformes: Nothobranchiidae), pp. 111-116
Aphyosemion mengilai, new species, is described from small streams belonging to the hydrographic system of the Ikoy River basin on the northern part of the Massif du Chaillu, central Gabon. It is similar to A. grelli and distinguished from all other congeners in having grey to black margins in the unpaired fins in males and females. It can be distinguished from A. grelli by having more dorsal and anal fin rays in males and females, by the more anterior insertion of dorsal fin relative to anal-fin origin, by having more scales on transverse series, more scales around caudal peduncle, and by the presence of light blue submarginal stripes in dorsal, anal, and caudal fin in females. Aphyosemion mengilai belongs to a clade, herein named A. grelli species group, which is diagnosed by the unique distinctive colour pattern of males and females consisting of grey to black margins on dorsal and anal fins.
Aphyosemion mengilai n. sp., male, about 35 mm SL, not preserved; Gabon: Province de la Ngounié, Ikoy River system. Photo by W. Grell.