Revision of deep-water species in Granulina (Gastropoda: Granulinidae) from Mauritania and Western Sahara Author Elm, Laura-Marie Von 9FB99C0B-AA0A-4AA8-8465-1EAFCC65B366 Thüringerstrasse 3, 26180 Rastede, Germany. laura-marievonelm@kabelmail.de Author Hoffman, Leon E2B27F54-29C5-46AA-9437-ABA84D54DDF3 Senckenberg am Meer, Südstrand 40, 26382 Wilhelmshaven, Germany. leon.hoffman@senckenberg.de text European Journal of Taxonomy 2024 2024-03-18 925 268 291 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2467/10969 journal article 10.5852/ejt.2024.925.2467 2118-9773 10837829 B09375C0-6E28-4E2D-BB7C-26E1753171E2 Granulina nofronii Smriglio, Gubbioli & Mariottini, 2000 Figs 1 , 2F–G Granulina nofronii Smriglio, Gubbioli & Mariottini, 2000: 58 , figs 4, 17–20; type locality off Mauritania , 80– 100 m . Smriglio et al . (2000) reported 24 shells from off Mauritania ( 80–100 m ) and from Western Sahara ( 50 m ) without further details. The holotype was deposited in the Bologna Zoology Museum (MZB14032). Twenty-three paratypes were retained in private collections. Material examined (23 shells) MAURITANIA – Banc d’Arguin • 20 shells; outer shelf off Banc d’Arguin ; 20.0438° N , 17.457° W ; depth 52 m ; 25 Oct. 2010 ; MSM16–3 stn GeoB14714; SaM • 1 shell; central outer Banc d’Arguin ; 20.2832° N , 17.3335° W ; depth 30 m ; 2 Nov. 2010 ; MSM16–3 stn GeoB14788; box core in muddy silt; SaM . – off Nouakchott • 2 shells; 17.0967° N , 16.73° W ; depth 127 m ; 17 Feb. 1977 ; M44 stn 193– KG626; box core; SMF . Remarks Smriglio et al . (2000) indicated a holotype height of 2.4 mm ; our set indicates a maximum height of 2.5 mm . The species has an elliptical or weak coffin-shaped outline; it has strong labial denticles, and it lacks rostration. A similar species is Granulina choffati La Perna, Landau & da Silva, 2003 from the Atlantic Pliocene in Portugal . It is differentiated from G. nofronii by a finer labial denticulation. The species is known from empty shells in the latitudinal range 17.0– 20.3° N . It was found at depths of 30–1252 m in silty sand or mud. We could not confirm the species occurring off Western Sahara .