Microgobius urraca Tornabene, van Tassell & Robertson, 2012
Dark-finned sand goby
Microgobius urraca
photo by Van Tassell, J.

Family:  Gobiidae (Gobies), subfamily: Gobiinae
Max. size:  6.94 cm SL (male/unsexed); 6.22 cm SL (female)
Environment:  pelagic-neritic; depth range 12 - 20 m
Distribution:  Eastern Pacific, Panama.
Diagnosis:  Dorsal spines (total): 8-8; Dorsal soft rays (total): 14-14; Anal spines: 1-1; Anal soft rays: 14-14; Vertebrae: 27-27. This species is distinguished from Microgobius urraca in having the following characters: lateral scale rows 67-76; patch of ctenoid scales under the pectoral fin absent; unpigmented epaxial myosepta; first dorsal fin with a distinct oval-shaped dark blotch; three blue-white stripes on a dark caudal fin. It differs from the remaining eastern Pacific congeners in the number and type of scales (pectoral- and pelvic fin base without scales; pre-anal region with small embedded cycloid scales; small scales on anterior and ventral portions of trunk, partially imbedded, and in irregular rows, becoming larger and arranged in distinct rows dorsally and posteriorly; no small patch of ctenoid scales beneath pectoral fin); D1 VII, D2 I,14; A I,14; fleshy dorsal crest poorly developed and overall color pattern (Ref. 91780).
Biology:  Found over sand or sand and leaf litter bottoms; where collections are found in the latter, this species was collected with several specimens of Ptereleotris carinata and M. erectus. Presumed to be a burrowing species (Ref. 91780).
IUCN Red List Status: Not Evaluated (N.E.) Ref. (120744)
Threat to humans:  harmless
Country info:   

Entered by: Capuli, Estelita Emily - 07.03.13
Modified by: Capuli, Estelita Emily - 05.12.13

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