Microdesmus dorsipunctatus Dawson, 1968 .

Spotback Wormfish, Backspotted Wormgoby; Gobiogusano de Dorso Manchado, Pez Lombriz de Lomo Punteado.

Distribution: Global: Eastern Pacific Ocean; from Southern Baja California and the mouth of the Gulf of California, Mexico, to Panama; entering estuaries and littoral lagoons and ascending river courses; Costa Rica: Pi (Pacific), 0– 3 m.a.s.l., Per, Dia.

Occurrence and conservation status: Nat, DD.

References: Angulo et al. (2013: 1009; listed, including taxonomic information and distributional data) and Robertson & Allen (2015: 2122; detailed description, including illustrations, information on distribution, with a map, and ecology).