Protobranchia Pelseneer 1889
Key to genera and species of Protobranchia found on GB 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. 1. Hinge plate narrowing but not interrupted under...
| Main Authors: | , , , , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2021
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| Subjects: | |
| Online Access: | https://doi.org/10.5281/zenodo.5837816 http://treatment.plazi.org/id/D63CF03CC33CFFA88E8DFD220B64F844 |
| Summary: | Key to genera and species of Protobranchia found on GB 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. 1. Hinge plate narrowing but not interrupted under the umbo, with teeth forming a continuous series. 2 – Hinge plate interrupted beneath the umbo by a ligamental pit. 3 2. Outline regularly oval, longer than high. Tindaria sericea (Jeffreys, 1876) (Fig. 31G‒I) – Outline rounded anteriorly and tapering posteriorly. Pseudoneilonella latior (Jeffreys, 1876) [not found on GB] 3. Outline triangular with rounded ends; inside of shell nacreous. 4 – Outline rounded, oval, or with anterior end rounded and posterior end tapering; inside of shell not nacreous. 6 4. Ventral margin smooth. Ennucula corbuloide s (Seguenza, 1877) (Fig. 31E‒F) ‒ Ventral margin crenulated by the termination of internal rods. 5 5. Shell plump, externally with fine radial microsculpture. Nucula atacellana Schenck, 1939 (Fig. 31C‒D) – Shell rather compressed, sculpture mostly commarginal. . Nucula tumidula Malm, 1861 (Fig. 31A‒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. 32A‒B) – Posterior end bluntly angular, umbo posterior to vertical midline. Ledella cf. orixa (Dall, 1927) (Fig. 32C‒D) 8. Shell less than 2 mm, white, rounded in outline. Pristigloma minima (Seguenza, 1877) (Fig. 31J‒K) – Shell larger, definitely longer than high. 9 9. Shell inflated, posteriorly tapering. Yoldiella semistriata (Jeffreys, 1879) (Fig. 32G‒H) – Shell very compressed, posterior part broadly rounded. Yoldiella valorousae Killeen & J. A. Turner, 2009 (Fig. 32I‒J) Published as part of Gofas, Serge, Luque, Ángel A., Oliver, Joan Daniel, Templado, José & Serrano, Alberto, 2021, The Mollusca of Galicia Bank (NE Atlantic Ocean), pp. 1-114 in European Journal ... |
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