aqua International Journal 26(2)
Volume 26, Issue 2 – 27 September 2020
Volume 26, Issue 2 – 27 September 2020
Gerald R. Allen and Helen K. Larson: Pseudogobiopsis rubrimaculosus, a new species of freshwater goby (Gobioidei: Gobiidae: Gobionellinae) from northwestern Papua New Guinea, pp. 33-40
Pseudogobiopsis rubrimaculosus n. sp. is described from a freshwater stream in Sandaun Province, Papua New Guinea, on the basis of eight specimens, 16.6-24.2 mm SL. Diagnostic features include: second dorsal-fin elements I,7; anal-fin elements I,5-7 (modally 6); pectoral-fin rays 14-15 (modally 15), longitudinal scales 23-25 (modally 23); transverse scales (TRB) 7-8 (modally 7); predorsal scales 7-9 (modally 7), reaching to behind eyes;jaws enlarged in adult males; dorsal head pores and preopercular pores present; fourth dorsal spine longest, none elongate; pterygiophore formula 3-21210; generally tan with narrow brown scale outlines on upper body and double series of brownish to red-brown markings laterally on sides; dorsal and caudal fins with reddish spots, anal fin reddish, and pelvic fins blackish.
Gerald R. Allen, Mark V. Erdmann and William M. Brooks: Egglestonichthys rubidus, a new species of marine goby (Pisces: Gobiidae) from Milne Bay Province, Papua New Guinea, pp. 41-48
Egglestonichthys rubidus n. sp. is described from two male specimens, 15.5-21.2 mm SL, collected from mud-bottom habitat in 18 m depth at Milne Bay Province, Papua New Guinea. Diagnostic features include: segmented dorsal and anal rays 7; pectoral rays 17-18; lateral scales 27-28; transverse scales 7; predorsal scales 13-18, extending to middleof interorbital; head and body scales entirely ctenoid, including breast, belly, prepelvic area, pectoral-fin base, predorsal, cheek, and opercle; cheek and opercle scales extend ventrally to lower margin; head pores absent; transverse papillae pattern on head, some rows raised, forming ridges; head, body, and fins generally red to reddish brown, outer edge of dorsal and anal fins with frost-like, white speckling. The new species differs from its four congenerics incounts for segmented dorsal and anal rays, pectoral rays, lateral scales, transverse scales, predorsal scales, arrangement of cephalic sensory papillae, and scale composition.
Jayasimhan Praveenraj, Tejas Thackeray and Shankar Balasubramanian: Schistura hiranyakeshi a new loach (Cypriniformes: Nemacheilidae) from Maharashtra, Northern Western Ghats, India, pp. 49-56
Schistura hiranyakeshi, a new species of loach is described from Hiranyakeshi River, Amboli, Sindhudurg district, Maharashtra. It is unique among congeners from peninsular, northeastern, and central India, and Sri Lanka in having an incomplete lateral line with 6-7 pores and ending at a point vertical at half the length of the adpressed pectoralfin; dorsal fin and caudal fin devoid of spots or blotches; body with 9-10 bars that are wider or almost equal in width to the interspaces; dorsal fin, anal fin and sub-dorsal bars with a unique crimson color in adult males; lower lip with a black mark on each side of the median interruption in live and preserved specimens; and no suborbital flap or axillary pelvic lobe.
Gerald R. Allen, Mark V. Erdmann and William M. Brooks: Acanthoplesiops jessicae, a new species of spiny basslet (Acanthoclininae: Plesiopidae) from Papua New Guinea, pp 57-65
A new species of plesiopid fish, Acanthoplesiops jessicae, is described from Milne Bay Province, eastern Papua New Guinea on the basis of four specimens, 13.2-14.8 mm SL, collected from reef slopes at depths between 27 and 65 m. It is the only member of the genus having scales restricted to the rear half of the body and fused pelvic fins with branched inner rays. Other diagnostic features include dorsal-fin rays XIX,5; anal-fin rays VII,5; caudal-fin broadly connected by membrane to last dorsal and anal rays; cephalic sensory pores on dentary 3; colour in life generally brown with numerous small white spots on cheek, opercle, body and dorsal and anal fins; white to orange median dorsal stripe from tip of lower jaw to first dorsal spine; posterior edge of dorsal, anal and caudal fins with broad, orange submarginal zone and narrow white outer margin.
|Dimensions||26.6 × 23.2 × 0.5 cm|