Glyptothorax Radiolus (Glyptothorax radiolus), first described by Ng & Lalramliana, 2013 is a small fish in the family Sisoridae (order Siluriformes). Adults typically reach 11.90 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus.
Dorsal spines (total): 1; Dorsal soft rays (total): 6; Anal soft rays: 13; Vertebrae: 36. Can be distinguished from other species of Glyptothorax in the Indian subcontinent except from G. ater, G. brevipinnis, G. churamanii, G. jayarami, G. pantherinus, G. pectinopterus and G. striatus in having (vs. lacking) a prominently plicate ventral surface of the pectoral-fin spine and the first pelvic-fin ray. Can be separated from G. ater, G. brevipinnis, G. churamanii, G. jayarami, G. nelsoni, G. pantherinus, G. pectinopterus, G. saisii and G. striatus in having a more slender body (depth at anus 11.2-11.4% SL vs. 11.7-16.4) and the following combination of characters: eye diameter 6.6-7.4% HL interorbital distance 28.3-28.7% HL, head length 23.7-24.3% SL, wedge-shaped central depression in thoracic adhesive apparatus devoid of skin ridges, unculiferous ridges of thoracic adhesive apparatus not extending anteriorly onto gular region, pectoral-fin length 21.4-22.8% SL, dorsal-fin spine length 11.6-13.9% SL, dorsal-to-adipose distance 26.6-26.8% SL, pelvic-fin length 16.5-18.3% SL, adipose-fin base length 13.1-14.3% SL, anal-fin base length 13.4-14.0% SL, caudal-peduncle length 20.9% SL, caudal-peduncle depth 7.7% SL (1.4-1.5 times in body depth at anus), absence of distinct pale midlateral stripe on body, and 36 total vertebrae .: elongated.
Behavioural data for Glyptothorax Radiolus is currently being reviewed.
Freshwater; demersal. Tropical West Bengal, India.
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