Conoidea Fleming 1822

• 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; Pyramidellidae; Hallan; The Gib; Serga; Northeast Atlantic; Cris
• Online Access: https://dx.doi.org/10.5281/zenodo.5837739; https://zenodo.org/record/5837739

Superfamily Conoidea Fleming, 1822 This species-rich superfamily is represented on Galicia Bank by members of the families Cochlespiridae Powell, 1942 ( Aforia Dall, 1889), Borsoniidae Bellardi, 1875 ( Drilliola Locard, 1897, Retidrillia J.H. McLean, 2000), Mangeliidae P.Fischer, 1883 ( Kurtziella Dall, 1918),and mostly Raphitomidae Bellardi, 1875 ( Pleurotomella Verrill, 1872, Gymnobela Verrill, 1884, Austrobela Criscione, Hallan, Puillandre & Fedosov, 2020, Teretia Norman, 1888, Neopleurotomoides Shuto, 1971). The separation of Pleurotomella species is very difficult, Bouchet & Warén (1980) should be consulted for identification in this genus. Key to the species of Conoidea found in the GB 1. Sculpture formed by clearly predominant spiral cords or keels....................................................... 2 – Sculpture of axial ribs and spiral cords............................................................................................. 6 2. Shell up to 35 mm high, with two keels and finer spiral threads................................................................................................................... Aforia serranoi Gofas, Kantor & Luque, 2014 (Fig. 26A–C) – Shell usually less than 10 mm, not keeled or with only one subsutural keel................................... 3 3. Last whorl hardly more than half of total height, protoconch ribbed............................................................................................................................ Drilliola loprestiana (Calcara, 1841) (Fig. 26F–G) – Last whorl nearly two-thirds of total height, protoconch not ribbed............................................... 4 4. Subsutural keel present; sometimes a very faint ribbing............................................................................................................. Gymnobela subaraneosa (Dautzenberg & H. Fischer, 1896) (Fig. 27I–J) – No subsutural keel............................................................................................................................ 5 5. Spiral cords coarse, protoconch small <0.5 mm................... Teretia teres (Reeve, 1844) (Fig. 26N) – Spiral cords fine, protoconch large> 0.7 mm............................................................................................................................... Teretia megalembryon (Dautzenberg & H. Fischer, 1896) (Fig. 26L–M) 6. Spiral sculpture comprising spiral cords, and finer spiral threads in the interspaces of the main cords............................................................................... Kurtziella serga (Dall, 1881) (Fig. 27A–B) – Spiral cords or threads maybe unequal, but not as above................................................................. 7 7. Protoconch whitish, with a marked peripheral keel and axial riblets............................................................................ Neopleurotomoides callembryon (Dautzenberg & H. Fischer, 1896) (Fig. 27E–F) – Protoconch generally brownish, with a cris-cross microsculpture of oblique riblets....................... 8 8. Protoconch globose with a blunt apex.............................................................................................. 9 – Protoconch conical with a pointed apex......................................................................................... 10 9. Whorls with a sharp keel bearing fine knobs......... Retidrillia pruina (Watson, 1881) (Fig. 26D–E) – Whorls bluntly angular, with definite flexuose ribs..................................................................................................................................................... Pleurotomella packardii Verrill, 1872 (Fig. 27C–D) 10. Shell robust, distinctly shouldered, with fine spiral cordlets and broader axial folds.....................11 – Shell thin, not distinctly shouldered, with spiral cords and axial ribs............................................ 12 11. Shell stout (diameter more than half the height), ribs few ........................................................................................................................................... Gymnobela abyssorum (Locard, 1897) (Fig. 26H–I) – Shell slender (diameter less than half the height), ribs numerous .......................................................................................... Austrobela pyrrhogramma (Dautzenberg & H. Fischer, 1896) (Fig. 26J–K) 12. Shell rather solid, brownish with faint spiral banding........................................................................ .......................................................... Pleurotomella gibbera Bouchet & Warén, 1980 (Fig. 27G–H) – Shell white or vitreous except for brown protoconch..................................................................... 13 13. Ribs thin and flexuous, much narrower than interspaces; spiral cords delicate and also widely spaced....................... Pleurotomella coelorhaphe (Dautzenberg & H. Fischer, 1896) (Fig. 27K–L) – Ribs rather robust, may be oblique but not definitely flexuous...................................................... 14 14. Ribs and cords forming a definite lattice, with interspaces about twice as broad as those; ribs ca 12 on last whorl............ Pleurotomella eurybrocha (Dautzenberg & H. Fischer, 1896) (Fig. 27M–N) – Ribs and cords with interspaces only slightly broader than them, ribs ca, 20 on last whorl........................................................ Pleurotomella demosia (Dautzenberg & H. Fischer, 1896) (Fig. 27O–P) Subclass Heterobranchia Family Pyramidellidae Gray, 1840 Members of the family Pyramidellidae, all of which are ectoparasites on other invertebrates (mostly annelids and molluscs), are unusually rare on GB, totalizing only 3 specimens and 8 shells. Family Pyramidellidae Gray, 1840 Members of the family Pyramidellidae, all of which are ectoparasites on other invertebrates (mostly annelids and molluscs), are unusually rare on GB, totalizing only 3 specimens and 8 shells. : 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 64-66, DOI: 10.5852/ejt.2021.785.1605, http://zenodo.org/record/5798418 : {"references": ["Locard A. 1897 - 1898. Expeditions scientifiques du Travailleur et du Talisman pendant les annees 1880, 1881, 1882 et 1883. Mollusques testaces. Masson, Paris. https: // doi. org / 10.5962 / bhl. title. 98313", "Verrill A. E. 1872. Results of recent dredging expeditions on the coast of New England. American Journal of Science and Arts (3) 5: 1 - 16.", "Bouchet P. & Waren A. 1980. Revision of the Northeast Atlantic bathyal and abyssal Turridae (Mollusca, Gastropoda). Journal of Molluscan Studies Supplement 8: 1 - 119. https: // doi. org / 10.1093 / mollus / 46. Supplement _ 8.1", "Gofas S., Kantor Y. & Luque A. A. 2014 a. A new Aforia (Gastropoda: Conoidea: Cochlespiridae) from Galicia Bank (NW Iberian Peninsula). Iberus 32 (1): 45 - 51. https: // doi. org / 10.5281 / zenodo. 4583436"]}