Land snail diversity in central China: revision of Laeocathaica Moellendorff, 1899 (Gastropoda, Camaenidae), with descriptions of seven new species Author Wu, Min https://orcid.org/0000-0002-5434-5544 School of Life Sciences, Nanjing University, Nanjing 210023, China minwu1969@aliyun.com Author Shen, Wang School of Life Sciences, Nanjing University, Nanjing 210023, China Author Chen, Zhong-Guang https://orcid.org/0000-0003-2689-3321 Jiangxi Province Key Laboratory of Watershed Ecosystem Change and Biodiversity, Center for Watershed Ecology, Institute of Life Science and School of Life Sciences, Nanchang University, Nanchang 330031, China text ZooKeys 2023 2023-03-20 1154 49 147 http://dx.doi.org/10.3897/zookeys.1154.86237 journal article http://dx.doi.org/10.3897/zookeys.1154.86237 1313-2970-1154-49 4E410C2ACC03438F8AC7C5370819DE6C E4F41DD1A11059DAB4A979F00E85D50F Laeocathaica odophora Moellendorff , 1899 Figs 2A , 3 , 19B , 19C , 20 , 42E , 47A , 47B , 51 Laeocathaica odophora Moellendorff , 1899: 97, pl. 6, fig. 6; - Yen 1939 : 149, pl. 15, fig. 39; - Chen and Zhang 2004 : 328, fig. 318; - Pall-Gergely et al. 2022 : 63, fig. 18B. Laeocathaica (Laeocathaica) odophora - Zilch 1968 : 174; - Richardson 1983 : 78. Laeocathaica (Laeocathaica) odontophora - Richardson 1983 : 78. Museum material. SMF 8954, holotype , juv; Dshie-dshou [阶州= Wudu], S-Gansu. Slg. O. v. Moellendorff . New material. HBUMM00566a, 5 juvs; Luotuoxiang [骆驼巷], Bikou [碧口], Wenxian , Gansu Province , 32.827686°N , 105.064656°E ; 1998-IV-25 , coll. Chen, D.-N. and Zhang, G.-Q. HBUMM04612, 1 fma and 1 juv ; 650 m away from Bikou Bridge, Wenxian, Gansu Province ; 1998-VI-24 , coll. Zhang , Xue-Zhong [张学忠]. HBUMM08158, 3 juvs; slope near river, Wenxian, Gansu Province , 807 m , 32.847111°N , 104.88775°E ; grass and a few shrubs, on branches and rock cliff; 2017-VIII-6 , coll. Sheng, X.-F. , etc.; DNA voucher HBUMM08158a. HBUMM08430, 1 fma, 1fms, 1 juv ; 1 fma dissected; near Fengjiaba [冯家坝], national road 212, Wenxian, Gansu Province , near point ( 33.08672°N , 104.826572°E ), on slope, 2019-X-12 , coll. Li, Q.-M. ; DNA voucher HBUMM08430a . Figure 20. Genital anatomy of Laeocathaica odophora Moellendorff , 1899, HBUMM08430-spec.1 A general view B ventral view of dart sac apparatus C left view of dart sac apparatus D cross-section of dart sac at the position arrowed in ( A ). Abbreviations: AS - accessory sac; At - atrium; BC - bursa copulatrix; BCD - bursa copulatrix duct; DS - dart sac; DtC - a chamber containing love dart; Ep - epiphallus; FO - free oviduct; MG - mucous glands; P - penis; PAS - proximal accessory sac; PO - opening of proximal accessory sac leading to dart chamber; PR - penial retractor muscle; PS - penial sheath; Va - vagina; VD - vas deferens. Distribution. Gansu: Wudu (type locality), Wenxian. Additional information of shell. The protoconch is smooth except some fine threads at the beginning and the end of the whorls. Spiral grooves are absent. On teleoconch between two adjacent ribs there are several indistinct fine threads. General anatomy. Eversible head wart present but not prominent. Jaw arcuate, with seven projecting ribs. Anatomy of genital organs. Penial sheath short, covering ~ 1/6 of penis. Penis tubular and equally thick. Inside penis, ~ 5 low pilasters present proximally, two high pilasters fusing into one Y-shaped fork at proximal 1/4. Fine pilasters on distal end of penis not merging into thick folds. Vas deferens narrow throughout. Vagina between atrium and dart sac not elongated. Vagina between dart sac and insertion of bursa copulatrix duct ~ 1/2 length of dart sac. Dart sac ~ 1/2 length of penis. Love dart ~ 4.5 mm long, apically 2-bladed. Accessory sac small but externally distinguishable, internally solid, inserting into dart sac at distal 1/3, opening to dart chamber. Mucous glands 5 (HBUMM08430-spec.1), each singly tubular or simply branched. Proximal accessory sacs two, asymmetrical with the right one distinctly larger, apically separated and ventrally touching, each centrally with an opening (rounded, diameter ~ 0.2 mm) leading to proximal dart chamber. Bursa copulatrix duct of even diameter. Bursa copulatrix ovate, small. Remarks. This species has a pair of asymmetrical and ventrally touching proximal accessory sacs that is rarely observed in the genus. In comparison, its conchologically similar species Laeocathaica zhengpingliui Wu, sp. nov. has a pair of symmetrical proximal accessory sacs that are ventrally separated from each other. For more comments, see Laeocathaica zhengpingliui Wu, sp. nov.