Bostrychus scalaris Larson, 2008
Ladder gudgeon
Bostrychus scalaris
photo by Larson, H.K.

 Family:  Eleotridae (Sleepers), subfamily: Butinae
 Max. size:  9.3 cm SL (male/unsexed)
 Environment:  benthopelagic
 Distribution:  Western Pacific: Malaysia.
 Diagnosis:  Dorsal spines (total): 7-7; Dorsal soft rays (total): 9-9; Anal spines: 1-1; Anal soft rays: 8-8; Vertebrae: 27-27. This species is distinguished by the following characters: D2 I,9; A I,8; pectoral rays 16; lateral line scales 135-142; mandibular sensory papilla row I arranged in clusters; head broad and depressed; body slender, compressed posteriorly; pectoral fins heavily pigmented; body with distinctive ladder-like dark bars and complex serpentine pattern (Ref. 83590).
 Biology:  The holotype was found under a small log in a very small muddy pool at low tide, in a partly cleared mangrove (dominated by Avicennia marina). The collection site is now 'reclaimed' land. The water was brackish (20 ppt) and only a few centimetres deep (Ref. 83590).
 IUCN Red List Status: Not Evaluated  (Ref. 96402)
 Threat to humans:  harmless
 Country info:   
 

 Entered by: Capuli, Estelita Emily - 12.04.11

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