CZ EN
SEARCH  

Taxon profile

species

Emarginula foveolata M.M. Schepman, 1908

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Lepetellida »  family Fissurellidae - Keyhole Limpets »  genus Emarginula

Images

Emarginula foveolata

Author: Schepman, M.

Taxon in country check-lists*

* List of countries might not be complete

Description

Shell oval, broader behind, conical, colour grey (probably not the natural colour), front slope strongly, side slopes slightly convex, posterior slope concave, apex curved, placed at about 2/3 of the total length, the apex being slightly worn, no whorl is visible. Sculpture consisting of numerous radiating ribs, about 22 at each side, with an intermediate one in the interstices at the sides, and a few at irregular intervals, they are crossed by weaker concentric ridges, which form small beads on the ribs, and leave deep pits in the interstices. Slit-fasciole rather large and deep, with conspicuous arched lamellae; slit long 2,5 mm, large nearly 1 mm at the base, its margin is thickened, a flat, broad, slightly grooved rib runs towards the apex, interior smooth, margin crenulated, with slightly raised sides. Long. 14,5 mm, lat. 11,5 mm., alt. 7,5 mm.
Schepman, 1908. The prosobranchia of the Siboga expedition. Part I: Rhipidoglossa and Docoglossa. (Original description)

Interchangeable taxa

The only specimen is slightly worn, and 1 think the grey colour must depend on its long abode in mud. It is allied to E. puncticulata Ads. (Proc. Zool. Soc. Lond. 1851) which is still larger and differs in sculpture, that species has according to the description, only 28 ribs, with 3 small riblets in the interstices and in the figures the shell is much less pitted.
Schepman, 1908. The prosobranchia of the Siboga expedition. Part I: Rhipidoglossa and Docoglossa. (Original description)
There has been a lot of confusion between "foveolata" and "fujitai". The fujitai from Habe, 1953 is at present, following WoRMS, in the genus Montfortula. Most fujitai figured in the literature are true Emarginula, so they are indeed synonyms of the older name foveolata which is from Schepman, 1909. Do not confuse with the Pacific Diodora foveolata (Garrett, 1873). This is the third largest Emarginula we know of in the Indo-Pacific. Only E. kashimaensis, which reaches 35.1 mm and E. poppeorum are known to grow much bigger: E. poppeorum grows up to 55 mm in length.
Poppe G.T. & Tagaro S.P. (2020). The Fissurellidae from the Philippines with the description of 26 new species.

Distribution

Philippines. Sulu Archipellago.
CONCH got 23 shells in the past: all Philippine specimens from the following islands: Aliguay Island, Balicasag Island, Bohol, Cebu - Sogod, Leyte, Siquijor, Mindanao - Samal & Zamboanga. The depth varies from 50 to 250 m. One specimen we collected ourselves at 4 to 8 m deep, diving. 19.7 to 30.8 mm.
Poppe G.T. & Tagaro S.P. (2020). The Fissurellidae from the Philippines with the description of 26 new species.
Author: Jan Delsing

Contributions to BioLib

Help us to expand this encyclopedia! If you are logged in, you can add new subtaxa, vernacular and scientific names, texts, images or intertaxon relationships for this taxon.

Comments