Grandinenia jiangjilini Chen, Lin, Wu & Ouyang, 2024

Chen, Zhong-Guang, Jiang, Jiao, Lin, Ran-Xi, Xie, Guang-Long, Dai, Yu-Ting, Wu, Xiao-Ping & Ouyang, Shan, 2024, A new species of Grandinenia Minato & Chen, 1984 (Gastropoda, Stylommatophora, Clausiliidae, Garnieriinae) from Guangxi, China, Zoosystematics and Evolution 100 (3), pp. 913-922 : 913-922

publication ID	https://doi.org/ 10.3897/zse.100.126340
publication LSID	lsid:zoobank.org:pub:CA2E9204-BB04-4AF9-964C-910DCFAE7A8D
DOI	https://doi.org/10.5281/zenodo.12699139
persistent identifier	https://treatment.plazi.org/id/5BBDAEB5-9C10-527D-A6D6-DF7527ABCBCB
treatment provided by	Zoosystematics and Evolution by Pensoft
scientific name	Grandinenia jiangjilini Chen, Lin, Wu & Ouyang
status	sp. nov.

Treatment

Grandinenia jiangjilini Chen, Lin, Wu & Ouyang sp. nov.

Figs 2 A View Figure 2 , 3 View Figure 3 , 4 A, B View Figure 4

Type material.

Holotype. 23 _ NCU _ XPWU _ YG 01 , Yao Mountain [瑶山], Binyang County [宾阳县], Nanning City [南宁市], Guangxi Zhuang Autonomous Region [广西壮族自治区], China, 23 ° 26 ' 12 " N, 108 ° 51 ' 49 " E, leg. Zhong-Guang Chen, Ji-Lin Jiang & Guang-Long Xie, September 2023. GoogleMaps

Paratypes. 49 specimens, 23 _ NCU _ XPWU _ YG 02–50 , other information same as holotype GoogleMaps .

Different diagnosis.

Shell entire (vs. decollated in G. ardouiniana (Heude, 1885) , G. gabijakabi Grego & Szekeres, 2014 , G. gastrum (Nordsieck, 2005) , G. mirifica (Chen & Gao, 1982) , G. pallidissima Nordsieck, 2010 , G. pseudofuchsi (Nordsieck, 2005) , G. rex Nordsieck, 2007 , G. rutila Nordsieck, 2016 , G. schomburgi (Schmacker & Boettger, 1890) , G. takagii (Chang, 2004) , G. umbra (Chang, 2004 )) , hardly decollated, inflated-fusiform (vs. slender-fusiform in all other congeners, except G. mirifica ), light yellowish-brown, semitranslucent; teleoconch with broad, blunt and sparse wrinkles (ribs) (vs. without or with thin and dense ribs in all other congeners); peristome not reflected; inferior lamella lower in front than within; penial caecum present (vs. absent in G. fuchsi (Gredler, 1883) , G. pseudofuchsi , G. takagii and G. mirifica ).

Description.

Shell (Figs 2 A View Figure 2 , 3 A, B View Figure 3 , 4 A, B View Figure 4 ) (n = 50). Entire, with 8.75–9.5 whorls, hardly decollated, inflated-fusiform, thin, fragile, semi-translucent, light yellowish-brown, with distinct darkish-red ribbon beneath the suture (fades quickly after fixing); dark seam along principal plica and lunella, body whorl in front of lunella darker; apical part conical to strongly attenuated. Suture deep. Protoconch smooth with 2.0–2.5 whorls. Wrinkles (ribs) on the teleoconch broad and blunt, most of them extending across the whole whorl, rather evenly distributed and widely spaced; on the neck, riblets white, thinner, stronger, more widely spaced and undulate. Aperture vastly extended, oval. Peristome expanded, not reflected. Superior lamella continuous with spiral lamella without a curve. Inferior lamella visible in front view of the aperture, steeply ascending, moderately low to high within, it ends deeper than the end of spiral lamella. Subcolumellar lamella strong, bent, visible or not in front view of the aperture, ending less deeply than the end of inferior lamella. Lunella vertical, in oblique view, partly visible through the aperture. Principal plica short, initiates ventrolaterally and extending laterally, not reaching peristome. Clausilium plate in oblique view nearly fully invisible, semi-translucent; overall slender; stalk thin; plate relatively broad.

Genitalia (Fig. 3 C View Figure 3 ) (n = 10). Atrium short and relatively broad. Penis almost cylindrical and shortly narrower at transition to epiphallus. Penial caecum present. Epiphallus slender, shorter than penis and smaller diameter. Penial retractor relatively thick and short, inserted at the middle part of penis. Vas deferens relatively slender and short. Vagina thick, cylindrical, slightly longer than free oviduct. Basal part of diverticulum thick, rapid thinning to apical part and attached to spermoviduct. Spermoviduct thick and long. Pedunculus of bursa copulatrix slender and long. Bursa copulatrix large, oval.

Measurements.

Holotype: shell height 24.5 mm, width 8.3 mm; aperture height 7.0 mm, width 7.7 mm. Paratypes: shell height 21.9–28.5 mm, width 7.4–8.4 mm; aperture height 5.9–7.3 mm, width 6.9–8.0 mm (n = 49).

Etymology.

The species is named after Mr Ji-Lin Jiang who first discovered the new species and assisted in the field survey.

Vernacular name.

江氏斜管螺 (Pinyin: jiāng shì xié guǎn luó).

Distribution and ecology.

Grandinenia jiangjilini sp. nov. is found from the Yao Mountain only (Figs 5 View Figure 5 – 7 View Figure 7 ). No other localities were found during the detailed survey conducted in 2022–2023 of the surrounding hills. It inhabits the vertical limestone cliff together with Papilliphaedusa porphyrea (Möllendorff, 1882) (Fig. 4 A, B View Figure 4 ).