Mo91 Modiolus metacalfei (Yellowbanded horse mussel)

 

Phylum: Mollusca

Class: Bivalvia

Order: Mytilida

Family: Mytilidae

 Genus: Modiolus

 Species: Modiolus metcalfei

Accepted Name: Modiolus modulaides

 

Description:

            Shell rather inflated, roughly triangular, and elongate-ovate in outline. Anterior margin short, slightly protruding anteriorly beyond the umbones. Posterodorsal margin straightish, forming a rather sharp angle with the produced, roundly wedge-shaped posterior margin. Ventral margin long and nearly straight in the posterior 2/3, recurved anteriorly.

           Outer surface is smooth, with only fine concentric growth marks, frequently eroded towards the umbones. Periostracum hairs not branched, developed on posterior half of the of valves. Hinge line smooth, without teeth or crenulations. Anterior adductor scar present.

 

IUCN Status: Not evaluated.