Two extraordinary alycaeid species from Northeastern India (Gastropoda: Caenogastropoda: Cyclophoroidea)

  • Neelavar Ananthram Aravind SM Sehgal Foundation Center for Biodiversity and Conservation, Ashoka Trust for Research in Ecology and the Environment (ATREE), Bangalore 560064, India
  • Barna Páll-Gergely Plant Protection Institute, HUN-REN Centre for Agricultural Research, H-1022 Budapest, Herman Ottó út 15, Hungary
Keywords: new species, biogeography, taxonomy, shell, Himalaya

Abstract

Cycloryx pemaledai Gittenberger & Sherub, 2022, which was described from northwestern Bhutan, is reported for the first time in Sikkim, India. That species differs from all its congeners by the short R3 (the region between the constriction and the peristome). The differences between the Bhutanese and Indian shells are minimal, therefore the Indian shells are identified as Cycloryx cf. pemaledai. Furthermore, Alycaeus himalayae n. sp. is described from Arunachal Pradesh. This is so far the only Alycaeus species inhabiting the Himalayas, and thus, its discovery is a real surprise.

References

Aravind, N. A. & Páll-Gergely, B. (2018): Dicharax (?) bawai n. sp from southern India (Gastropoda: Cyclophoroidea: Alycaeidae). – Archiv für Molluskenkunde 147(1): 55–62. https://doi.org/10.1127/arch.moll/147/055-062

Benson, W. H. (1851): Geographical notices, and characters of fourteen new species of Cyc­lostoma, from the East Indies. – The Annals and Magazine of Natural History, Series 2 8(45): 184–195. https://doi.org/10.1080/03745486109496203

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

Benson, W. H. (1859): A sectional distribution of the genus Alycæus, Gray, with characters of six new species and of other Cyclostomidæ collected at Darjiling by W. T. Blanford, Esq., Geol. Survey. – The Annals and Magazine of Natural History, Series 3 3: 176–184. https://www.biodiversitylibrary.org/page/2317897

Blanford, W. T. (1864): On the classification of the Cyclostomacea of Eastern Asia. – The Annals and Magazine of Natural History, Series 3 13: 441–465. https://doi.org/10.1080/00222936408681635

Bollinger, G. (1918): Land-Mollusken von Celebes. Ausbeute der in den Jahren 1902 und 1903 ausgeführten zweiten Celebes-Reise der Herren Dr. P. und Dr. F. Sarasin. – Revue Suisse de Zoologie 26: 309–340. https://doi.org/10.5962/bhl.part.82528

Bouchet, P. & Rocroi, J.-P. (2005): Classification and nomenclator of gastropod families. – Malacologia 47(1–2): 1–397. https://www.biodiversitylibrary.org/page/25127200

Bouchet, P., Rocroi, J.-P., Hausdorf, B., Kaim, A., Kano, Y., Nützel, A., Parkhaev, P., Schrödl, M. & Strong, E. E. (2017): Revised classification, nomenclator and typification of gastropod and monoplacophoran families. – Malacologia 61(1–2): 1–526. https://doi.org/10.4002/040.061.0201

Egorov, R. V. (2013): Treasure of Russian shells. Supplement 3. A review of the genera of the terrestrial pectinibranch molluscs (synopsis mainly based on published data). Part III. Littoriniformes: Liareidae, Pupinidae, Diplommatinidae, Alycaeidae, Cochlostomidae. – R. Egorov, Moscow, 61 pp.

Eydoux, J. F. T. (1838): Mollusques du voyage de la Favorite. – Magazine de Zoologie 1838: 114–119. [12 pls] https://biodiversitylibrary.org/page/37129027

Gittenberger, E., Gyeltshen, C., Togbay, K. & Sherub, Sh. (2022): The genera Dioryx and Cycloryx (Gastropoda, Caenogastropoda, Alycaeidae) in Bhutan, with a description of four new species. – Basteria 86(2): 72–82.

Godwin-Austen, H. H. (1871): Descriptions of the species of Alycæinæ known to inhabit the Khasi Hill ranges. – Journal of the Asiatic Society of Bengal 40: 87–93. https://www.biodiversitylibrary.org/page/35630903

Godwin-Austen, H. H. (1874): Descriptions of nine species of Alycæinæ from Assam and the Naga Hills. – Journal of the Asiatic Society of Bengal 43(2): 145–150. https://www.biodiversitylibrary.org/page/35549500

Godwin-Austen, H. H. (1875): Descriptions of new operculated land shells belonging to the genera Craspedotropis, Alycæus, and Diplommatina, from the Nágá Hills and Assam. – Journal of the Asiatic Society of Bengal 44: 7–10. https://www.biodiversitylibrary.org/page/37191980

Godwin-Austen, H. H. (1876): On the Cyclostomacea of the Dafla Hills, Assam. – Journal of the Asiatic Society of Bengal 4(2): 171–184. https://doi.org/10.1111/j.1096-3642.1874.tb02450.x

Godwin-Austen, H. H. (1882–1920): Land and freshwater Mollusca of India, including South Arabia, Baluchistan, Afghanistan, Kashmir, Nepal, Burma, Pegu, Tenasserim, Malaya Peninsula, Ceylon and other islands of the Indian Ocean; Supplementary to Masers Theobald and Hanley’s Conchologica Indica. – Taylor and Francis, London, Vol. 1(1): [i–iv] 1–18, pls 1–4 [February 1882]; 1(2): 19–66, pls 5–12 [July 1882]; 1(3): 67–94, pls 13–21 [January 1883]; 1(4): pls 22–42 [September 1883], 95–164 [October 1883]; 1(5): pls 43–51 [June 1884], 165–206 [May 1886]; 1(6): pls 52–62 [September 1887], 207–257 [April 1888]. Volume 2(7): 1–46, pls 63–69 [October 1897]; 2(8): 47–86, pls 70–82 [January 1898]; 2(9): 87–146, pls 83–100 [November 1899]; 2(10): 147–238, pls 101–117 [April 1907]; 2(11): 239–310, pls 118–132 [March 1910]; 2(12): 311–442, pls 133–158 [December 1914]. Volume 3: 1–65, pls 159–165. https://www.biodiversitylibrary.org/page/13069144

Godwin-Austen, H. H. (1888): On some land-mollusks from Burmah, with descriptions of some new species. – Proceedings of the Zoological Society of London 1888: 240–245. https://doi.org/10.1111/j.1469-7998.1888.tb06701.x

Gray, J. E. (1847): A list of the genera of recent Mollusca, their synonyma and types. – Proceedings of the Zoological Society of London 15: 129–219. http://biodiversitylibrary.org/page/12862913

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

Kerney, M. P. & Cameron, R. A. D. (1979): A field guide to the land snails of Britain and North-west Europe. – Collins, London, 288 pp.

Kobelt, W. & Möllendorff, O. von (1897): Catalog der gegenvärtig lebend bekannten Pneumonopomen. – Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft 29: 73–88, 105–120, 137–152. https://www.biodiversitylibrary.org/page/28228303

Kobelt, W. & Möllendorff, O. von (1900): Zur Systematik der Pneumonomen. – Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft 32: 186. https://www.biodiversitylibrary.org/page/15598533

Möllendorff, O. von (1897a): Diagnosen neuer und kritischer Landdeckelschnec­ken. – Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft 29: 31–45. https://biodiversitylibrary.org/page/28228223

Möllendorff, O. von (1897b): Neue Landschnecken von Java. – Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft 29: 89–97. https://biodiversitylibrary.org/page/28228249

Páll-Gergely, B. (2017): A new species of Alycaeidae, Pincerna yanseni n. sp. from Sumat­ra, with the resurrection of the genus Pincerna Preston, 1907 (Gastropoda: Cyclophoroidea). – Raffles Bulletin of Zoology 65: 213–219.

Páll-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

Páll-Gergely, B., Naggs, F. & Asami, T. (2016): Novel shell device for gas exchange in an operculated land snail. – Biology Letters 12: 20160151. https://doi.org/10.1098/rsbl.2016.0151

Páll-Gergely, B., Hunyadi, A., Sang, D. D., Naggs, F. & Asami, T. (2017): Revision of the Alycaeidae of China, Laos and Vietnam (Gastropoda: Cyclophoroidea) I: The genera Dicharax and Metalycaeus. – Zootaxa 4331(1): 1–124. https://doi.org/10.11646/zootaxa.4331.1.1

Páll-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

Páll-Gergely, B., Hunyadi, A., Grego, J., Reischütz, 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

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.

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

Preston, H. B. (1907): Description of a new subgenus and species of Alycæus from Ke-Lan-Tan. – Proceedings of the Malacological Society of London 7: 206. https://doi.org/10.1093/oxfordjournals.mollus.a066171

Preston, H. B. (1914): Characters of new land and freshwater shells from the Naga Hills, Assam. – Proceedings of the Malacological Society of London 11: 19–24. https://www.biodiversitylibrary.org/page/15715517

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

Sarasin, P. & Sarasin, F. (1899): Materialien zur Naturgeschichte der Insel Celebes. Die Land-Mollusken von Celebes. – Kreidel’s Verlag, Wiesbaden, [VIII +] 248 pp. [pls 1–31] https://doi.org/10.5962/bhl.title.53476

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.a064766

Published
2023-10-30
How to Cite
AravindN. A., & Páll-GergelyB. (2023). Two extraordinary alycaeid species from Northeastern India (Gastropoda: Caenogastropoda: Cyclophoroidea). Acta Zoologica Academiae Scientiarum Hungaricae, 69(4), 353-363. https://doi.org/10.17109/AZH.69.4.353.2023