Akko dionaea Birdsong & Robins
drawing from Birdsong & Robins

Papillae Drawing   Myology   


Head Pores - Pore B' and G' very small and not always present.

Scales - Small, rounded, nonoverlapping and mostly embedded cycloid scales cover the body to the occipital line; head, pectoral-fin base and axil are naked; scale rows irregular about 76rows between the axil and the end of the body

Fins - D1-7; all median fins continuous, connected by membranes;D2-15(15); A-15(15); caudal 17 segmented rays; caudal shape lanceolate; pectoral fins relatively short, not reaching above the tip of the pelvic fins, 17 rays; pelvic fins united, all rays branched, frenum well developed, length of fin - less than 1/2 distance to anus;

Head - Eye very small, 2-3% of head length; lateral line canals and pores absent; mouth large and nearly vertical; no rostral frenum; posterior nostral - elongate opening just anterodorsal of the eye; anterior nostral directly in front of the eye at the snout rim, with a low raised rim.

Papillae - A general transverse pattern; row b elongate extending forward to past the anterior of the eye; row d continuous, no vertical rows extend below row d; see drawing above for details.

Osetology - PTY formula 3-221110; basihyal minute, tongue supported primarily by dorsal and ventral hypohyals; posterio extension of supraocciptal crest dorsoventrally flattened to a spatulate shape; hypurals 1-2 not fused to 3-4; scapula very smalland cartilaginous;

Color - Colorless except for the distal two-thirds of the principal caudal rays and the distal parts of the posterior anal rays which are dusky.

Distribution -

Habitat -

Notes -