Waldo Nicol, 1966

Valentich-Scott, Paul, O Foighil, Diarmaid & Li, Jingchun, 2013, Where's Waldo? A new commensal species, Waldo arthuri (Mollusca, Bivalvia, Galeommatidae), from the Northeastern Pacific Ocean, ZooKeys 316, pp. 67-80 : 69-70

Waldo Nicol, 1966

Waldo Nicol 1966. Type species (original designation) Lepton parasiticus Dall, 1876. Recent, Antarctica.

Description.

Shell small (length less than 5 mm), ovate to trapezoidal, extremely thin, fragile, translucent to opaque, gaping ventrally and on anterior and posterior ends; sculpture of commarginal striae, weak radial ribs in some; periostracum thin to thick, translucent to white; hinge plate narrow, adults edentate; ligament internal; mantle papillate, reflected, covering most of outer shell surface; long, slender mantle tentacles extend well past shell margin; foot elongate, thin, triangular to cylindrical, heel strong to absent; with one demibranch on each side.

Discussion.

Zelaya and Ituarte (2002) revived the use and understanding of this genus, with the redescription of the type species, Waldo parasiticus , and the description of a new species: Waldo trapezialis . They described, for the first time, the gross anatomy of members of the genus and suggested a possible position within the Galeommatoidea . All species are likely to be obligate commensals with echinoid echinoderms. Two additional species were described from the southwestern Atlantic Ocean ( Zelaya and Ituarte 2013).