Tag Archive for: Pleistocene

Some notes on the genus Schileykiella Manganelli, Sparacio & Fo. Giusti, 1989 (Gastropoda, Helicoidea: Canariellidae) from Tunisia and Libya

Authors: F. Liberto, A. Abusneina, A. Gregorini, M. Colomba
Basteria, 88 (1): 25-28

Abstract

Building on the recent re-allocation of Helix sordulenta to the genus Schileykiella, this paper provides further insights into the taxonomy, palaeontology, and distribution of Schileykiella in North Africa. Additionally, the taxon Helix mendicaria L. Pfeiffer, 1860, described from Tunisia, is here proposed as a junior synonym of Schileykiella sordulenta (Morelet, 1851), and the taxon Xerophila chadiana darnensis Hey, 1955, described from Derna (Cyrenaica, Libya), is identified as a possible congeneric fossil species.

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Download articleArtikel Some notes on the genus <em>Schileykiella</em> Manganelli, Sparacio & Fo. Giusti, 1989 (Gastropoda, Helicoidea: Canariellidae) from Tunisia and Libya

Liralithes, a new genus of Clavalithidae (Neogastropoda) from the Indo-West Pacific, with comments on the late evolution of apertural lirae

Authors: G.J. Vermeij, J.G.M. Raven, M. Harzhauser
Basteria, 88 (1): 38-42

Abstract

In the Clavilithidae Vermeij & M. A. Snyder, 2018, here raised from subfamily to family status in Neogastropoda, we name Liralithes gen. nov. (type species: Fusus tjidamarensis K. Martin, 1879) from the Early Miocene to Early Pleistocene of the Indo-Malayan region. It differs from other clavilithids by having lirae on the inner side of the outer lip and by having columellar folds. Lirae evolved very late in this family as well as in Muricidae, Fasciolariidae (Fusininae), Melongenidae, and Dolicholatiridae. In Dolicholatiridae, the genus Latirofusus Cossmann, 1889 (lirae absent) from the Paleocene and Eocene differs from the post-Eocene Dolicholatirus Bellardi, 1884 (lirae present).

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Download articleArtikel <em>Liralithes</em>, a new genus of Clavalithidae (Neogastropoda) from the Indo-West Pacific, with comments on the late evolution of apertural lirae

Distribution and ecology of Zootecus insularis (Ehrenberg, 1831) (Gastropoda, Pulmonata, Achatinidae, Subulininae) and its value as a palaeoenvironmental indicator species

Authors: A. Girod, D. Sassoon
Basteria, 86 (2): 120-152

Abstract

Zootecus insularis is a land snail usually confined to arid and semidesert environments. However, studies from the Arabian Peninsula and Pakistan have reported that this spe­cies have also lived in mesic habitats such as gardens, palm plantations, and other irrigated places. A likely reason for this contradiction is that Z. insularis is highly adaptable and therefore able to survive in semi-arid environments as well as more mesic microhabitats. Most of the mesic micro­habitats where Z. insularis has been found are of anthropic origin and, therefore, related to modern, often present-day ecology. We present an in-depth, comprehensive review of both ancient and modern occurrences of Z. insularis based on 19th and 20th century contributions of geographers, zoolo­gists, botanists, and archaeologists, and we investigate this species’ palaeoenvironment. Comparisons made between finds of Z. insularis, floral and faunal remains, and palaeoen­vironmental records show that this species had responded to periods of climatic variability in Asia and Africa during the Pleistocene and Holocene. Overall, our review contrib­utes to the understanding of the distribution of Z. insularis through space and time, and its use as a palaeoenvironmen­tal indicator.

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Download articleArtikel Distribution and ecology of <em>Zootecus insularis</em> (Ehrenberg, 1831) (Gastropoda, Pulmonata, Achatinidae, Subulininae) and its value as a palaeoenvironmental indicator species