Protobranchia Pelseneer 1889
- Dataset
- The Mollusca of Galicia Bank (NE Atlantic Ocean)
- Rank
- SUBCLASS
Classification
- kingdom
- Animalia
- phylum
- Mollusca
- class
- Bivalvia
description
5. Shell plump, externally with fine radial microsculpture ..................................................................... ................................................................................ Nucula atacellana Schenck, 1939 (Fig. 31 C ‒ D) – Shell rather compressed, sculpture mostly commarginal ................................................................... ..................................................................................... Nucula tumidula Malm, 1861 (Fig. 31 A ‒ B) 6. Posterior end acute or more or less angular ...................................................................................... 7 – Posterior end rounded, even if somewhat tapering ........................................................................... 8 7. Posterior end acute, umbo anterior to vertical midline ....................................................................... ........................................................................... Ledella messanensis (Jeffreys, 1870) (Fig. 32 A ‒ B) – Posterior end bluntly angular, umbo posterior to vertical midline ..................................................... ...................................................................................... Ledella cf. orixa (Dall, 1927) (Fig. 32 C ‒ D) 8. Shell less than 2 mm, white, rounded in outline ................................................................................. .......................................................................... Pristigloma minima (Seguenza, 1877) (Fig. 31 J ‒ K) – Shell larger, definitely longer than high ............................................................................................ 9 9. Shell inflated, posteriorly tapering .................... Yoldiella semistriata (Jeffreys, 1879) (Fig. 32 G ‒ H) – Shell very compressed, posterior part broadly rounded ..................................................................... .......................................................... Yoldiella valorousae Killeen & J. A. Turner, 2009 (Fig. 32 I ‒ J)
discussion
See also Killeen & Turner (2009) for identification of many North Atlantic Yoldiella Verrill & Bush, 1897 and Ledella Verrill & Bush, 1897 species not found in the present material.
Name
- Homonyms
- Protobranchia Pelseneer 1889