Dicharax Kobelt & Mollendorff 1900
Authors/Creators
Description
Dicharax (?) tangmaiensis (Chen & Zhang, 2001)
Chamalycaeus tangmaiensis Chen & Zhang, 2001: 184 –185, 188–189, figs 1–4.
Type locality. "TONGmaI TOwN, (30°01'N, 95°E), BOmI COUNTy, TIbET AUTONOmOUs REGION, CHINa ".
Original description. " SHELL smaLL, THICk, sUbdEprEssEd, sEmITraNparENT. WHOrLs 3½, mOdEraTELy CONvEx, spIrE LOw, CONOId, aNd THE prOTOCONCH aNd sECONd wITH LUsTrE, GENEraLLy smOOTH. SHELLs yELLOwIsH brOwN IN COLOUr, sUrfaCE wITH vEry fINELy aNd sOmEwHaT rEGULarLy rIb-sTrIaE, sUTUrE dEEp, aNd wITH a 0.56 mm prOjECTION as wOrmfOrmEd aT THE sUTUrE Of THE bOdy wHOrLs. UmbILICUs wIdE, rEGULarLy wIdENING, sHOwING THE EarLIEr wHOrLs INsIdE. ApErTUrE CIrCULar, THICk, wITH wavE-fOrmEd LOps, aNd a NECk. OpErCULUm CIrCULar, sINk, INNEr sUrfaCE Has a papULEfOrmEd prOjECTION."
Remarks. THIs spECIEs Is prOvIsIONaLLy pLaCEd IN THE GENUs Dicharax bECaUsE THE prOTOCONCH Is LOw, aNd THE rIbs ON R2 arE sEEmINGLy NOT sHarp.
IN THE OrIGINaL dEsCrIpTION Chamalycaeus tangmaiensis was COmparEd ONLy wITH Chamalycaeus diminutus, wHICH Is vEry dIffErENT by bEING mUCH smaLLEr, HavING a rOUNdEd pErIsTOmE aNd LaCkING a sHarp swELLING ON R3. FUrTHErmOrE, IT was OrIGINaLLy dEsCrIbEd aT LEasT 1300 km frOm THE TypE LOCaLITy Of Chamalycaeus tangmaiensis. WE wErE NOT abLE TO ExamINE Chamalycaeus tangmaiensis, bUT THE ILLUsTraTIONs IN THE OrIGINaL dEsCrIpTION prOvIdE ENOUGH EvIdENCE THaT IT dIffErs frOm aLL OTHEr CHINEsE ALyCaEIdaE. ON THE OTHEr HaNd, THErE arE a NUmbEr Of NOrTH- EasTErN INdIaN aNd BUrmEsE spECIEs, wHICH aGrEE wITH D. tangmaiensis IN THE fLaT sHELL, THE sTrONGLy CrENULaTEd pErIsTOmE aNd THE swELLING ON R3 sITUaTEd vEry CLOsE TO THE pErIsTOmE: Alycaeus crenatus GOdwIN-AUsTEN, 1871 (TypE LOCaLITy: "ON BUrraIL RaNGE, N. CaCHar, aT abOUT 5000 fEET"); Alycaeus cucullatus THEObaLd, 1870 (TypE LOCaLITy: " SHaN STaTEs"); Alycaeus daflaensis GOdwIN-AUsTEN, 1876 (TypE LOCaLITy: "TOrúpúTú PEak, 7000 fEET"); Alycaeus digitatus BLaNfOrd, 1871 (TypE LOCaLITy: "apUd DarjEELING IN vaLLO RUNGNO fLUmINIs HImaLayae SIkkImENsIs"); Alycaeus ochraceus GOdwIN-AUsTEN, 1893 (TypE LOCaLITy: "RUby MINEs DIsTrICT, UppEr BUrmaH"); Alycaeus plectocheilus BENsON, 1859 (TypE LOCaLITy: "IN vaLLE RUNGUN"). FUTUrE INvEsTIGaTION sHOULd fOCUs ON THE dIsTINCTNEss Of Chamalycaeus tangmaiensis frOm THE abOvE-mENTIONEd spECIEs.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Scientific name authorship
- Kobelt & Mollendorff
- Kingdom
- Animalia
- Phylum
- Mollusca
- Order
- Architaenioglossa
- Family
- Alycaeidae
- Genus
- Dicharax
- Taxon rank
- genus
- Type status
- holotype
- Taxonomic concept label
- Dicharax Kobelt, 1900 sec. Asami, 2017
References
- Chen, D. - N. & Zhang, G. - Q. (2001) Five new species of land shells from the Tibet Autonomous Region, China. Acta Zootaxonomica Sinica, 26 (1), 184 - 190.
- Godwin-Austen, H. H. (1871) Descriptions of the species of Alycaeinae known to inhabit the Khasi Hill ranges. Journal of the Asiatic Society of Bengal, 40, 87 - 93. Avaliable from: http: // www. biodiversitylibrary. org / item / 110241 # page / 111 / mode / 1 up (Accessed 10 Oct. 2017)
- Blanford, H. F. (1871) On some undescribed species of Camptoceras and other land shells. Journal of the Asiatic Society of Bengal, 1871, 39 - 45. Avaliable from: http: // www. biodiversitylibrary. org / item / 110241 # page / 57 / mode / 1 up (Accessed 10 Oct. 2017)
- Benson, W. H. (1859) A Sectional Distribution of the genus Alycaeus, Gray, with Characters of six new species and of other Cyclostomidae collected at Darjiling by W. T. Blanford, Esq., Geol. Survey. The Annals and Magazine of Natural History, 3 (3), 176 - 184.