Alycaeus Gray 1850
Description
Type species: Cyclostoma gibbum Eydoux, 1838 [= Alycaeus eydouxi Venmans, 1956]).
Remarks: Among the genera distributed in the Himalayas, it cannot be included in Dicharax Kobelt & Möllendorff, 1900 (type species: Alycaeus hebes Benson, 1857) because Dicharax species are mostly depressed (not conical) and nearly all species lack spiral striation (but there are exceptions, see e.g. PÁLL-GERGELY et al. 2021). Cycloryx species are much smaller, with dominant radial sculpture and a very short R2. Metalycaeus Pilsbry, 1900 (type species: Alycaeus melanopoma Pilsbry, 1900 = Alycaeus nipponensis Reinhardt, 1877) species are characterized by a spirally striated protoconch. The only possible candidate would be Chamalycaeus Möllendorff, 1897b (type species: Alycaeus fruhstorferi Möllendorff, 1897 b), which also lack spiral striation on the protoconch, but Chamalycaeus species are usually not conical, are mostly whitish, and possess stronger radial sculpture.
Based on the general shell and aperture shape and the long R2, this new species fits perfectly in the genus Alycaeus. Nevertheless, Alycaeus species are only known from southern Thailand, Peninsular Malaysia, northern and central Laos and northern and central Vietnam (PÁLL-GERGELY et al. 2020, PÁLL-GERGELY 2023). Pincerna mouhoti (L. Pfeiffer, 1862) and Pincerna vanbuensis (Bavay et Dautzenberg, 1900), inhabiting northern Laos and northern Vietnam (see Fig. 4), may belong to Alycaeus, but has been included in the genus Pincerna in the latest revision. Therefore, A. himalayae sp. n. is so far the westernmost distribution of the genus.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Alycaeidae
- Genus
- Alycaeus
- Kingdom
- Animalia
- Order
- Architaenioglossa
- Phylum
- Mollusca
- Scientific name authorship
- Gray
- Taxon rank
- genus
- Taxonomic concept label
- Alycaeus Gray, 1850 sec. Aravind & Páll-Gergely, 2023
References
- GRAY, J. E. (1850): Descriptions of taxa. In: BAIRD, W. & GRAY, J. E. (eds): Nomenclature of molluscous animals and shells in the collection of the British Museum. Part I. Cyclophoridae. - British Museum, London, 69 pp. https: // www. biodiversitylibrary. org / page / 39306790
- EYDOUX, J. F. T. (1838): Mollusques du voyage de la Favorite. - Magazine de Zoologie 1838: 114 - 119. [12 pls] https: // biodiversitylibrary. org / page / 37129027
- VENMANS, L. A. W. C. (1956): Notes on Alycaeus. - Proceedings of the Malacological Society of London 32: 81 - 87. https: // doi. org / 10.1093 / oxfordjournals. mollus. a 064766
- KOBELT, W. & MOLLENDORFF, O. von (1900): Zur Systematik der Pneumonomen. - Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft 32: 186. https: // www. biodiversitylibrary. org / page / 15598533
- BENSON, W. H. (1857): Characters of Streptaulus a new genus and several species of the Cyclostomacea from Sikkim, the Khasi Hills Ava and Pegu. - The Annals and Magazine of Natural History, Series 2 19: 201 - 211. https: // doi. org / 10.1080 / 00222935708681840
- PALL-GERGELY, B., HUNYADI, A., GREGO, J., REISCHUTZ, A. & AUFFENBERG, K. (2021): Nineteen new species of Alycaeidae from Myanmar and Thailand (Gastropoda: Caenogastropoda: Cyclophoroidea). - Zootaxa 4973 (1): 1 - 61. https: // doi. org / 10.11646 / zootaxa. 4973.1.1
- PILSBRY, H. A. (1900): Notices of new Japanese land shells. - Proceedings of the Academy of Natural Sciences of Philadelphia 52: 381 - 384. https: // www. biodiversitylibrary. org / page / 24694261
- REINHARDT, O. (1877): Herr Reinhardt legte eine Anzahl japanischer ..., pp. 67 - 70. In: Peters (Director): Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin 1877: 23 - 84. https: // www. biodiversitylibrary. org / page / 8796787
- MOLLENDORFF, O. von (1897 b): Neue Landschnecken von Java. - Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft 29: 89 - 97. https: // biodiversitylibrary. org / page / 28228249
- PALL-GERGELY, B., SAJAN, S., TRIPATHY, B., MENG, K., ASAMI, T. & ABLETT, J. D. (2020): Genus-level revision of the Alycaeidae (Gastropoda: Cyclophoroidea), with an annotated species catalogue. - ZooKeys 981: 1 - 220. https: // doi. org / 10.3897 / zookeys. 981.53583
- PALL-GERGELY, B. (2023): Revision of the Alycaeidae of China, Laos and Vietnam (Gastropoda: Cyclophoroidea) II: The genera Alycaeus and Pincerna. - Zootaxa 5249 (2): 253 - 276. https: // doi. org / 10.11646 / zootaxa. 5249.2.4
- PFEIFFER, L. (1862): Descriptions of thirty-six new land shells, from the collection of H. Cuming. - Proceedings of the Zoological Society of London 1860: 268 - 278.