Stiphodon palawanensis Maeda & Palla, 2015

Family:  Gobiidae (Gobies), subfamily: Sicydiinae
Max. size:  6.39 cm SL (male/unsexed); 6.36 cm SL (female)
Environment:  demersal; freshwater; depth range - 3 m
Distribution:  Asia: Palawan, Philippines.
Diagnosis:  Dorsal spines (total): 6-7; Dorsal soft rays (total): 9-9; Anal spines: 1-1; Anal soft rays: 10-10. Stiphodon palawanensis is distinguished by the following characters: first dorsal fin pointed in male; second dorsal fin usually with one spine and nine segmented rays, pectoral fin usually with 15 segmented rays; relatively large caudal fin (26-34% of SL) in male; premaxilla with 45-71 tricuspid teeth, dentary with 2-6 (male) or 1-4 (female) symphyseal teeth and 45-79 unicuspid horizontal teeth; nape and posterior part of occipital region covered by cycloid scales; 9-11 dusky transverse bars laterally on trunk and tail; first dorsal fin gray or dusky after preservation (orange or reddish brown in life) without any distinct markings, having a line of black blotches (male) or a black band (female) on distal part of second dorsal fin; pectoral fin without clear markings (Ref. 104909).
Biology:  Occurs in pools with a substrate composed of a mixture of boulders, gravel, and pebbles with exposed bedrock in some places. Also found in rapids. Two cyprinid species, Barbodes palavanensis (Boulenger) and Rasbora everetti Boulenger co-exist very abundantly with Stiphodon palawanensis. Syntopic with other common fishes such as two gobioids, Glossogobius illimis Hoese & Allen and Redigobius sp., and a halfbeak Dermogenys palawanensis Meisner (Ref. 104909).
IUCN Red List Status: Least Concern (LC); Date assessed: 09 August 2020 Ref. (130435)
Threat to humans:  harmless
Country info:  Occurs in central Palawan where it inhabits streams flowing into the Sulu Sea. One of the dominant fishes in the middle reaches of Balsahan Stream (Puerto Princesa City) and Barake Stream (Aborlan) in May 2015 (Ref. 104909).


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