Protobranchia Pelseneer 1889

• Main Authors: Gofas, Serge, Luque, Ángel A., Oliver, Joan Daniel, Templado, José, Serrano, Alberto
• Format: Text
• Language: unknown
• Published: Zenodo 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Bivalvia; Rockall Trough; Malm; Pelseneer; North Atlantic; Northeast Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.5837816; https://zenodo.org/record/5837816

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) Family Nuculanidae H. & A. Adams, 1858 : 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 of Taxonomy 785 (1) on pages 75-76, DOI: 10.5852/ejt.2021.785.1605, http://zenodo.org/record/5798418 : {"references": ["Killeen I. J. & Turner J. A. 2009. Yoldiella and Portlandia (Bivalvia) from the Faroe-Shetland Channel and Rockall Trough, northeast Atlantic. Journal of Conchology 39 (6): 733 - 778.", "Dall W. H. 1927. Small shells from dredgings off the southeast coast of the United States by the United States Fisheries Steamer Albatross, in 1885 and 1886. Proceedings of the United States National Museum 70 (2667): 1 - 134. https: // doi. org / 10.5479 / si. 00963801.70 - 2667.1"]}