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Bostrychus scalaris Larson, 2008 Ladder gudgeon |
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photo by
Larson, H.K. |
| Family: | Butidae (Gudgeon gobies) | |||
| Max. size: | 9.3 cm SL (male/unsexed) | |||
| Environment: | benthopelagic; marine | |||
| 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: | Vulnerable (VU); Date assessed: 18 March 2024 (B2ab(iii)) Ref. (130435) | |||
| Threat to humans: | harmless | |||