Late Viséan (Carboniferous) gastropods from the Gara El Itima (eastern Anti-Atlas, Morocco)

Abstract

Diverse and well‐preserved Late Viséan (Early Carboniferous) gastropod faunas from the eastern Anti‐Atlas of Morocco are described herein. The new genus Itimaspira n. gen. is described as well as the six new species Ananias weyeri n. sp., Itimaspira klugi n. sp., Nodospira krawczynskii n. sp., Baylea cordulae n. sp., Cinclidonema marocensis n. sp., and Schizostoma africanum n. sp., together with specimens of the genera Baylea, Orthonema, ?Knightella sp. and Macrochilina in open nomenclature. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Slit-bearing gastropods in the Jane Longstaff Collection at the Natural History Museum, London from the Visean (Carboniferous) of Dalry, Ayrshire, Scotland

“…The slit-bearing gastropod fauna of early Carboniferous (Visean) specimens from Dalry, Ayrshire is composed of the cosmopolitan Carboniferous genera: Biarmeaspira , Neilsonia , Tapinotomaria , Borestus , Stegocoelia ( Stegocoelia ), Stegocoelia ( Hypergonia ), Donaldospira , and Platyzona (e.g., Belgium: de Koninck, 1883; Poland: Gromczakiewicz-Łomnicka, 1973; Russia: Mazaev, 2001, 2002, 2011; Germany: Amler, 2006; Australia: Yoo, 1988, 1994; Morocco: Heidelberger et al, 2009; United States: Thein and Nitecki, 1974; Batten, 1995; Hoare et al, 1997; Kues and Batten, 2001; Karapunar et al, 2022; Japan: Kase, 1988). The studied fauna shares two common species with the contemporaneous (Visean) Hotwells Limestone of Somerset, England (Batten, 1966a, b): Stegocoelia ( Stegocoelia ) compacta (Donald, 1889) and Borestus similis .…”

“…However, there are no shared species between the studied fauna and slightly younger (Namurian) fauna from Cheshire, England, suggesting a high turnover rate through time and/or high endemism. It should also be noted that studies on Visean gastropods from regions other than the UK are scarce (e.g., Poland: Gromczakiewicz-Łomnicka, 1973; Japan: Kase, 1988; Morocco: Heidelberger et al, 2009) and the foundational work on the Carboniferous gastropods of Belgium by de Koninck (1842–1844, 1883) still needs modern taxonomic revision, which complicates understanding the relationship of the Dalry fauna to other Visean faunas.…”

“…The most recent work on British Carboniferous gastropods was done by Peel (2016), who described a slightly younger (Namurian) gastropod fauna from Cheshire (England) also yielding a substantial proportion of slit-bearing groups (10 of 27 species; Peel, 2016). Pleurotomariida and Goniasmatidae were also major groups in other Carboniferous gastropod faunas (e.g., Belgium: de Koninck, 1883; Russia: Mazaev, 2001, 2002, 2011; Germany: Amler, 2006; Australia: Yoo, 1988, 1994; Morocco: Heidelberger et al, 2009; United States: Thein and Nitecki, 1974; Batten, 1995; Hoare et al, 1997; Kues and Batten, 2001; Karapunar et al, 2022). Herein, we discuss the relationship of the studied slit-bearing gastropod fauna from Dalry to other lower Carboniferous faunas.…”

Revisión de Glabrocingulum Thomas (1940), (Gastropoda, Eotomariidae) del Paleozoico superior marino de Patagonia, Chubut, Argentina.

“…Por su parte Knight et al (1960Knight et al ( , p. 1206) reconocen a G. (Glabrocíngulum) y G. (Ananias), al igual que Hoare (1961), Waterhouse, (1963), Manceñido & Sabattini (1973), Sabattini (1978), Gordon & Yochelson (1983, Yi & Yochelson (1983), Kues & Batten (2001). G. (Ananias) Knight (1945) es considerado como género (Chronic, 1952;Newell et al, 1953;Batten, 1989;Pan & Erwin, 2002;Heidelberger et al, 2009). Ananias Knight (1945) claramente difiere de las formas troquiformes de Glabrocingulum por presentar conchilla gradada, espira moderada a alta, selenizona angosta y cóncava, motivo por el cual en esta contribución se acepta la diagnosis genérica inicial de Knight (1945, p. 573-574).…”

New insight on Carboniferous (Viséan) brachiopods from eastern Tafilalt (Morocco)

“…) were long‐time restricted to the faunal lists and brief descriptions in the pioneer studies of the regional geology of Clariond (, ) and Delépine (, ). Quite recently, this area has regained some attention, especially for its rich cephalopod and gastropod faunas (Korn et al , ; Klug et al , ; Heidelberger et al , ; Korn et al , ). Aretz et al () provided some preliminary data related to rugose corals and brachiopods from the strata located between the Jebel Begaa to the SW and the Gara El Itima to the NE (Fig.…”