Roa uejoi Matsunuma & Motomura, 2022
Guam barred butterflyfish
Roa uejoi
photo by Matsunuma, M.

Family:  Chaetodontidae (Butterflyfishes)
Max. size:  10.13 cm SL (male/unsexed)
Environment:  reef-associated; marine; depth range - 172 m
Distribution:  Western Pacific: Mariana Is., Guam.
Diagnosis:  Dorsal spines (total): 11-11; Dorsal soft rays (total): 21-22; Anal spines: 3-3; Anal soft rays: 16-17; Vertebrae: 24-24. This species is distinguished from its congeners by the following set of characters: pored lateral-line scales 36-43; distal portion of the outer branch of first pelvic-fin soft ray a long filament, extending considerably from posterior contour of fin, first soft ray length 119%-123% of second ray; no black blotch on membranes associated with the first and second dorsal-fin spines; upper jaw naked, scaleless; pelvic-fin spine and first soft ray broadly whitish, and the remaining portions of fin black (in preserved specimens); the second black body band crossing pectoral-fin base, with no pale narrow interrupting lines; ocellated spot on dorsal-fin soft-rayed portion is more circular than oval, ratio of long axis/short axis of blotch 1.2-1.3 (Ref. 126057).
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless


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