Aporrhais serresiana (Michaud, 1828)
Iceland & Norway to Morocco, to central Mediterranean. Lives on sandy-muddy bottoms, from circalittoral to shelf and slope. Filter and detritus feeder.
Original taxon: Rostellaria serresiana.
30m deep, on mud, Málaga, Andalucia, S. Spain. 50-60mm.
Thinner and lighter that A. pespelecani, with longer and finer digitations, it has paler colours and lives in deeper waters.
An other specimen from Málaga, pictured by H. Zell for Wikimedia Commons (CC BY-SA).
« This shell, close to Rostellaria Pes Pelecani Lam., can be distinguished from it by its constantly smaller size, its thinner test, but above all by its four fingers, among which the one closer to the spire is almost parallel to it and longer, while it is smaller in Lamarck’s species, and obliquely directed. […] We dedicate this species to the professor Marcel de Serres, who is too famous to need eulogies. » – A. Michaud: “IX— Description de plusieurs espèces de coquilles vivantes de la Méditerranée…”, Bulletin d’histoire naturelle de la société linnéenne de Bordeaux vol. II, Bordeaux 1827.

Synonyms: macandreae, pescarboni, sarsii
In mud at 450m deep, Golfo di Cagliari, S. Sardinia. 35mm.
Rostellaria serresiana in Michaud.
Notice the interdigital growth lines.
200-300m deep, off Málaga. 53mm.
The species in W. Kobelt:
Iconographie der schalentragenden europäischen Meeresconchylien vol. IV, Wiesbaden 1908, plate CII.
30m deep on muddy bottom, Málaga. 57mm.
Pair trawled off Asturias, N. Spain. 32-34mm.
800m deep, El Garraf, Barcelona, Catalunya, NE. Spain. 44,5mm.

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