Pupina bilabiata Jirapatrasilp, 2022

Jirapatrasilp, Parin, Sutcharit, Chirasak & Panha, Somsak, 2022, Annotated checklist of the operculated land snails from Thailand (Mollusca, Gastropoda, Caenogastropoda): the family Pupinidae, with descriptions of several new species and subspecies, and notes on classification of Pupina Vignard, 1829 and Pupinella Gray, 1850 from mainland Southeast Asia, ZooKeys 1119, pp. 1-115 : 1

publication ID

https://dx.doi.org/10.3897/zookeys.1119.85400

publication LSID

lsid:zoobank.org:pub:A3BE91C6-B793-44E1-A886-A803BF104D8B

persistent identifier

https://treatment.plazi.org/id/E970A73C-E3EE-4DDA-B7C8-1B9D7960E3EF

taxon LSID

lsid:zoobank.org:act:E970A73C-E3EE-4DDA-B7C8-1B9D7960E3EF

treatment provided by

ZooKeys by Pensoft

scientific name

Pupina bilabiata Jirapatrasilp
status

sp. nov.

Pupina bilabiata Jirapatrasilp sp. nov.

Figs 28M-P View Figure 28 , 31D-F View Figure 31 , 32B-D View Figure 32 , 33A View Figure 33

Type material examined.

Holotype CUMZ 12073/1 (Figs 28M View Figure 28 , 31D View Figure 31 ), 31 July 2019, coll. C. Sutcharit, A. Pholyotha. Measurement: shell height 7.4 mm, shell width 5.0 mm and 5½ whorls. Paratypes CUMZ 12073/2-13 (12 specimens in ethanol; Fig. 32B View Figure 32 ) and NHMUK 20210334 (2 shells), same data as holotype.

Type locality.

Banpot Pisai Temple, Lang Suan District, Chumphon Province, Thailand, 9°56'05.0"N, 99°08'56.7"E, 20 m amsl.

Other material examined.

CUMZ 12074 (11 shells) from Bat Cave , Phu Pha Man District, Khon Kaen Province, 20 Oct. 2007 . CUMZ 12075 (9 shells and 7 specimens in ethanol) from Phraya Nakharaj Cave , Phu Pha Man District, Khon Kaen Province, 21 July 2020 . CUMZ 12076 (4 shells) from Tham Pha Pu Temple, Mueang Loei District , Loei Province, 28 Oct. 2018 . CUMZ 12077 (1 shell and 17 specimens in ethanol) from Tham Pha Pu Temple , Mueang Loei District, Loei Province, 1 Sept. 2020 . CUMZ 12078 (3 shells) from Phu Pha Lom, Mueang Loei District , Loei Province, 1 Sept. 2020 . CUMZ 12079 (2 shells; Figs 28N, 31E) from Tham Pha Ya Temple, Na Duang District , Loei Province, 28 Oct. 2018 . CUMZ 12080 (2 specimens in ethanol) from Hin Pha Ngam Park, Nong Hin District , Loei Province, 2 Sept. 2020 . CUMZ 12081 (13 shells; Figs 28O View Figure 28 , 31F View Figure 31 ) from Pha Jor Cave , Na Wang District, Nong Bua Lam Phu Province, 15 Oct. 2007 . CUMZ 12082 (15 shells and 9 specimens in ethanol; Fig. 32C View Figure 32 ) from Pha Jor Cave , Na Wang District, Nong Bua Lam Phu Province, 31 Aug. 2020 . CUMZ 12083 (2 shells) from Tham Suwannakhuha Temple, Suwannakhuha District , Nong Bua Lam Phu Province, 31 Aug. 2020 . CUMZ 12084 (8 shells) from Pa Pha Ya Temple, Suwannakhuha District , Nong Bua Lam Phu Province, 31 Aug. 2020 . CUMZ 12085 (2 specimens in ethanol) from Phu Thong Thep Nimit Temple, Nong Saeng District , Udon Thani Province, 30 Aug. 2020 . CUMZ 12086 (2 shells; Figs 28P View Figure 28 , 33A View Figure 33 ) from Na San Temple, Ban Na San District , Surat Thani Province, 3 July 2017 . CUMZ 12087 (2 specimens in ethanol; Fig. 32D View Figure 32 ) from Ban Yai , Phanom District, Surat Thani Province, 7 Aug. 2016 . CUMZ 12088 (2 shells) from Tham Nam Lod Thepnimit Bureau of Monks , Sawi District, Chumphon Province, 30 July 2019 . CUMZ 12089 (1 specimen in ethanol) from Tham Kanlayanamit Temple, Tham Phannara District , Nakhon Si Thammarat Province, 4 July 2017 .

Diagnosis.

Shell ovate-fusiform to fusiform; last whorl ca. three quarters of shell height. Apertural lip highly thickened, slightly expanded; with a furrow between inner and outer peristomes; inner peristome thickened, cord-like; apertural lip curved when observed from lateral view. Columellar tooth curved downward like an earlobe.

Differential diagnosis.

Pupina bilabiata sp. nov. is similar to P. peguensis in shell shape, but differs in having a furrow between inner and outer peristomes, with an inner peristome thickened and cord-like. This furrow also appears in P. godwinausteni sp. nov. and P. stoliczkai sp. nov., but P. godwinausteni sp. nov. is larger and more globose, and the apertural lip when observed from lateral view is more angled than that of P. bilabiata sp. nov., whereas P. stoliczkai sp. nov. belongs to the P. aureola species group.

Description.

Shell height 4.0-8.4 mm; shell width 4.4-5.7 mm. Shell ovate-fusiform to fusiform, solid, semi-transparent, whitish to pale brown, devoid of prominent sculpture on glazed smooth surface. Apex obtuse. Growth lines on shell surface inconspicuous. Whorls 5½ -6, last whorl large (ca. three quarters of shell height) and bulging slightly. Spire angle ca. 80°, somewhat extended. Sutures slightly impressed, but shallow. Aperture circular; lip thickened to highly thickened (ca. 0.5-0.6 mm wide and 0.3-0.6 mm thick) with paler colour, slightly expanded; apertural lip curved when observed from lateral view. Apertural lip with a furrow between inner and outer peristomes, with inner peristome thickened and cord-like. Parietal callus sharply defined and thickened with paler colour. Peristome interrupted by two canals; posterior canal ca. 0.8-0.9 mm long, 0.5 mm at its widest, curved outward and bulging at outer margin; anterior canal slit-like, as long as apertural lip width. Parietal tooth indistinct to thick; columellar tooth curved downward like an earlobe (ca. 1.5 mm long, 0.9 mm wide and 0.5 mm thick), covering anterior canal. Umbilicus closed. Operculum round, yellowish, transparent corneous with uneven edge.

Etymology.

The Latin specific epithet Pupina bilabiata means "with double lip" representing the separation of the inner and outer peristomes by a furrow.

Distribution.

Northeastern and southern Thailand.

Remarks.

This new species has a disjunct distribution and shows varying degrees of thickness of the inner peristome within specimens from the same collecting localities.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Architaenioglossa

Family

Pupinidae

Genus

Pupina