Descriptions of two new species
of shrimpgobies (Gobiidae:
Cryptocentrus and Tomiyamichthys) from
Papua New Guinea
Gerald R. Allen
Two new species of alpheid-shrimp-associated
gobies are described from Milne Bay Province, Papua
New Guinea. Cryptocentrus epakros n. sp. is
described from a single female specimen, 34.2 mm SL.
Diagnostic features include 47 longitudinal scales
(most species in the genus with more than 70), scales
entirely cycloid, and the seventh and eighth anal-fin
rays prolonged to form a distinctly pointed posterior
anal-fin profile. It also possesses a unique color
pattern featuring six brown bars with yellowish interspaces,
vertical orange markings on the dorsal fins, a dusky
brown anal fin except the last few rays bright yellow,
a yellowish caudal fin with blue streaks, and narrow,
oblique orange bands on the cheek and opercle of males.
Tomiyamichthys zonatus n. sp. is described
on the basis of three specimens, 24.1–30.6 mm SL.
Diagnostic features include 11 dorsal and anal-fin
soft rays; 52–54 longitudinal scales; cycloid scales
anteriorly, becoming ctenoid posteriorly; preopercular
sensory canal and pores absent; first four dorsal-fin
spines with short, filamentous tips; distinct sexual
dichromatism with the male characterized by five brown
saddles on the back, seven orange-brown bars on the
ventral half of the body, a prominent black bar across
the outer two thirds of last two anal-fin rays, and
pale yellow pelvic fins with bright yellow spots.
Both sexes possess a mid-lateral row of alternating
large and small rectangular blotches enclosed within
a pair of thin stripes from the pectoral fin to the
caudal-fin base. Females have darker brown markings,
lack ventral body bars, and possess more ornate fins,
consisting of variable dark stripes or blotches on
the dorsal, anal, and pelvic fins.
Allen, G.R. (2015) Descriptions
of two new species of shrimpgobies (Gobiidae: Cryptocentrus
and Tomiyamichthys) from Papua New Guinea.
Journal of the Ocean Science Foundation, 16,
publication date: 18 August