Myersina adonis, a New Species of Shrimp-associated Goby (Pisces, Perciformes, Gobiidae) from the Andaman Sea

摘要

A new shrimp-associated goby, Myersina adonis, is described based on seven specimens (21.7-31.3 mm in standard length) collected from shallow seagrass beds on the Andaman coast of Thailand. Myersina adonis is distinguished from the congeners in having: Ⅵ-Ⅰ, 10 dorsal-fin rays; Ⅰ, 9 anal-fin rays; 53-61 longitudinal scales; 4-5+14-17=18-21 gill rakers; united gill membranes with a distinct free rear margin across the isthmus at least in males (but not pronounced in most females); five transverse rows of sensory papillae on cheek; dorsal half of the body mottled with charcoal gray, without distinct longitudinal stripes; three faint, dusky vertical bars on side of belly; and a wedge-shaped black spot on pectoral-fin base. When alive or fresh, there are minute bright blue spots scattered on the head and body; minute reddish spots on the jaws; three or four irregular rows of red spots on the second dorsal fin; and a series of alternating red and yellow spots on membrane between first and second spines of the first dorsal fin in males.