Bulimus fragilis Lamarck 1822
| Main Author: | Breure, Abraham S. H. |
|---|---|
| Format: | info publication-taxonomictreatment |
| Terbitan: |
, 2016
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5745055 |
Daftar Isi:
- Bulimus fragilis Lamarck, 1822 Figs 60-61 Bulimus fragilis Lamarck, 1822: 123. – Delessert, 1841: pl. 28 figs 2a-b. – Chenu, 1850 [1842-1854]: pl. 9 figs 2a-b. – Mermod, 1951: 729, fig. 79. Type locality: “l’Angleterre”, see remarks. Label: No locality, but taxon label in Lamarck’s handwriting. Dimensions: “Longueur, 1 pouce”; figured specimen herein H 28.3, D 13.1, W 6.5. Type material: MHNG-INVE-51164, five syntypes (Lamarck coll.). Remarks: Lamarck described this species as British, having it received from Leach with the name Helix fragilis Montagu, 1803 (= Lymnaea stagnalis L., 1758). Pilsbry (1901 [1901 -1902]: 171) was the first to realize that this taxon could be a Drymaeus species; he suggested “ Drymaeus stramineus, liliaceus, virginalis, or their allies”. Mermod (1951) confirmed the protoconch having the typical grating sculpture of Drymaeus. He compared the syntypes with specimens and figures in literature of the first two taxa mentioned by Pilsbry, and found them different from Lamarck’s specimens. He also compared the specimens with Pfeiffer’s description of Bulimus virginalis (Pfeiffer, 1856: 46), and suggested that these might be conspecific. However, comparing the specimens with the probable syntypes of Pfeiffer’s taxon (Breure & Ablett, 2014: 207, fig. 24C), I disagree as Bulimus virginalis is more elongate and more slender than B. fragilis. Since the locality is unclear, it is preferred to keep this taxon as a distinct species until future research sheds more light on the systematic position. Current systematic position: Bulimulidae, Drymaeus (Mesembrinus) fragilis (Lamarck, 1822).
- Published as part of Breure, Abraham S. H., 2016, Annotated type catalogue of the Orthalicoidea (Mollusca, Gastropoda, Stylommatophora) in the Muséum d'histoire naturelle, Geneva, pp. 57-103 in Revue suisse de Zoologie 123 (1) on pages 69-70, DOI: 10.5281/zenodo.46290