Valiguna siamensis ( Martens, 1867 )

Mitchueachart, Bowornluk, Sutcharit, Chirasak, Tongkerd, Piyoros & Panha, Somsak, 2024, Morphological and molecular evidence uncovers hidden species diversity in the leatherleaf slug genus Valiguna (Systellommatophora, Veronicellidae) from Thailand, ZooKeys 1212, pp. 79-107 : 79-107

publication ID	https://doi.org/ 10.3897/zookeys.1212.126624
publication LSID	lsid:zoobank.org:pub:8A1608E5-7559-47CF-A942-8F569A35EB68
DOI	https://doi.org/10.5281/zenodo.13760741
persistent identifier	https://treatment.plazi.org/id/B7A03219-AE5E-5FC6-8DAD-F869D8D60BA1
treatment provided by	ZooKeys by Pensoft
scientific name	Valiguna siamensis ( Martens, 1867 )
status

Treatment

Valiguna siamensis ( Martens, 1867) View in CoL

Figs 2 View Figure 2 , 3 B View Figure 3 , 4 A View Figure 4 , 5 View Figure 5 , 6 View Figure 6 , 7 A View Figure 7

Vaginulus siamensis Martens, 1867: 68, pl. 5; fig. 3. Type locality: Petshaburi [Phetchaburi Province, Thailand]. View in CoL

Veronicella bocourti Rochebrune, 1882 b: 117 . Type locality: Bangkok [ Thailand].

Veronicella chaudoensis Rochebrune, 1882 a: 67 . Type locality: Montagnes de Chadou [Chau Doc City, An Giang Province, Vietnam].

Veronicella titanotona Rochebrune, 1882 a: 68 . Type locality: Spiglumi-Britton [ Cochinchina].

Vaginulus reticulatus Westerlund, 1883: 49. Type locality: Galle [ Sri Lanka]. Thomé 1984: 29–32, figs 1–7. View in CoL

Semperula bocourti : Grimpe and Hoffmann 1925 b: 44. Hoffmann 1925: 181.

Semperula chaudoensis : Grimpe and Hoffmann 1925 b: 44. Hoffmann 1925: 181.

Semperula titanotoma [sic]: Grimpe and Hoffmann 1925 b: 44 [misspelling]. Hoffmann 1925: 181.

Semperula siamensis View in CoL : Grimpe and Hoffmann 1925 a: 388, 390–392. Grimpe and Hoffmann 1925 b: 17 –19, 44–47, fig. 8. Hoffmann 1925: 179–181, 256, 257, pl. 3, fig. 29, pl. 6, fig. 45 k 3, pl. 8, figs 58, 60, 61 a, 62, pl. 9, fig. 64, pl. 10, fig. 71, pl. 11, figs 78–80. Solem, 1966: 21. Hemmen and Hemmen 2001: 40.

Valiguna siamensis View in CoL : Gomes and Thomé 2004: 595, 596. Gomes et al. 2008: 164, 169, figs 13–18. Inkhavilay et al. 2019: 48 View Cited Treatment , figs 19 b, 55 b. Sutcharit et al. 2020 a: 16, 17, fig. 3 d.

Material examined.

Laos: • Wat Oudom , Khamkeut, Bolikhamsai; 18 ° 10 ' 56.6 " N, 104 ° 59 ' 04.6 " E; CUMZ 16001 View Materials GoogleMaps . Myanmar: • Winner hotel , Kalaw, Shan; 20 ° 37 ' 40.4 " N, 96 ° 33 ' 28.1 " E; CUMZ 16002 View Materials GoogleMaps . Thailand: Chiang Rai: • Wat Tham Pha Mee , Mae Sai; 20 ° 32 ' 01.7 " N, 99 ° 52 ' 34.5 " E; CUMZ 16003 View Materials GoogleMaps ; • Wat Tham Pha Chom , Mae Sai; 20 ° 26 ' 31.9 " N, 99 ° 52 ' 23.5 " E; CUMZ 16004 View Materials GoogleMaps ; • Wat Pa Pha Mi , Mae Sai; 20 ° 24 ' 18.3 " N, 99 ° 51 ' 09.9 " E; CUMZ 16005 View Materials GoogleMaps ; • Wat Tham Pum , Mae Sai; 20 ° 20 ' 54.1 " N, 99 ° 51 ' 37.9 " E; CUMZ 16006 View Materials GoogleMaps ; • Wat Tham Pla Witthayakhom School , Mae Sai; 20 ° 19 ' 58.3 " N, 99 ° 51 ' 52.9 " E; CUMZ 16007 View Materials GoogleMaps ; • Wat Tham Phra ( Buddha Cave ), Mueang Chiang Rai; 19 ° 55 ' 06.3 " N, 99 ° 47 ' 19.5 " E; CUMZ 16008 View Materials GoogleMaps ; • Wat Tham Phra Pha Kok , Wiang Chai; 19 ° 52 ' 21.4 " N, 100 ° 02 ' 41.9 " E; CUMZ 16009 View Materials GoogleMaps ; • Mae Lao Wildlife Breeding Center , Mae Lao; 19 ° 45 ' 57.6 " N, 99 ° 38 ' 12.6 " E; CUMZ 16010 View Materials GoogleMaps ; • Wat Tham Phajarui , Pa Daet; 19 ° 34 ' 19.1 " N, 99 ° 59 ' 17.3 " E; CUMZ 16011 View Materials GoogleMaps ; Chiang Mai: • Wat Tham Pha Phueng , Chai Prakan; 19 ° 44 ' 19.1 " N, 99 ° 05 ' 16.2 " E; CUMZ 16012 View Materials GoogleMaps ; • Khun Mai Baan Suan Resort, Mae Ai; 20 ° 03 ' 46.7 " N, 99 ° 21 ' 31.6 " E; CUMZ 16013 View Materials GoogleMaps ; • Wat Tham Tap Tao , Chai Prakan; 19 ° 39 ' 46.3 " N, 99 ° 07 ' 03.4 " E; CUMZ 16014 View Materials GoogleMaps ; • Wat Tham Klaeb , Chiang Dao; 19 ° 33 ' 33.4 " N, 99 ° 03 ' 46.9 " E; CUMZ 16015 View Materials GoogleMaps ; • Tham Chiang Dao , Chiang Dao; 19 ° 23 ' 38.3 " N, 98 ° 55 ' 43.2 " E; CUMZ 16016 View Materials GoogleMaps ; • Homdoi Guesthouse , Samoeng; 18 ° 51 ' 04.5 " N, 98 ° 43 ' 37.4 " E; CUMZ 16017 View Materials GoogleMaps ; • B-tel Chom Thong Resort, Chom Thong; 18 ° 26 ' 19.4 " N, 98 ° 40 ' 20.9 " E; CUMZ 16018 View Materials GoogleMaps ; Lampang: • Tham Pha Thai , Ngao; 18 ° 36 ' 19.7 " N, 99 ° 53 ' 51.9 " E; CUMZ 16019 View Materials GoogleMaps ; • Chao Por Pratu Pha Shrine, Mae Mo; 18 ° 30 ' 49.9 " N, 99 ° 49 ' 09.9 " E; CUMZ 16020 View Materials GoogleMaps ; Lamphun: • Wat Pa Phai , Li; 17 ° 52 ' 22.6 " N, 98 ° 55 ' 26.8 " E; CUMZ 16021 View Materials GoogleMaps ; • Wat Doi Daen , Ban Hong; 18 ° 21 ' 52.5 " N, 98 ° 45 ' 42.3 " E; CUMZ 16083 View Materials GoogleMaps ; Phrae: • Huai Rong Waterfall, Rong Kwang; 18 ° 26 ' 31.6 " N, 100 ° 27 ' 00.9 " E; CUMZ 16022 View Materials GoogleMaps ; Bueng Kan: • Wat Tham Pha Khao , Si Wilai; 18 ° 11 ' 27.3 " N, 103 ° 49 ' 59.9 " E; CUMZ 16023 View Materials GoogleMaps ; • Wat Tham Phra Phu Wuua , Seka; 18 ° 08 ' 12.9 " N, 103 ° 59 ' 34.8 " E; CUMZ 16024 View Materials GoogleMaps ; Loei: • Wat Tham Pha Baen , Chiang Khan; 17 ° 54 ' 24.6 " N, 101 ° 43 ' 28.5 " E; CUMZ 16025 View Materials GoogleMaps ; • Wat Tham Pha Pu , Mueang Loei; 17 ° 34 ' 44.6 " N, 101 ° 42 ' 40.0 " E; CUMZ 16026 View Materials GoogleMaps ; • Wat Thepnimitr , Phu Ruea; 17 ° 28 ' 03.3 " N, 101 ° 16 ' 32.7 " E; CUMZ 16027 View Materials GoogleMaps ; • Wat Tham Erawan , Erawan; 17 ° 20 ' 43.5 " N, 102 ° 01 ' 07.3 " E; CUMZ 16028 View Materials GoogleMaps ; • Wat Tham Pha Bing , Wang Saphung; 17 ° 14 ' 03.8 " N, 101 ° 44 ' 14.6 " E; CUMZ 16029 View Materials GoogleMaps ; • Wat Tham Maholan , Nong Hin; 17 ° 06 ' 26.2 " N, 101 ° 52 ' 43.7 " E; CUMZ 16030 View Materials GoogleMaps ; Nong Bua Lam Phu: • Wat Tham Suwannakhuha , Suwannakhuha; 17 ° 36 ' 29.2 " N, 102 ° 16 ' 57.1 " E; CUMZ 16031 View Materials GoogleMaps ; • Wat Tham Pha Chor , Na Wang; 17 ° 18 ' 50.6 " N, 102 ° 07 ' 05.0 " E; CUMZ 16032 View Materials GoogleMaps ; Sakon Nakhon: • Kham Hom Waterfall, Mueang Sakon Nakhon; 17 ° 07 ' 25.2 " N, 104 ° 01 ' 07.3 " E; CUMZ 16033 View Materials GoogleMaps ; • Wat Tham Phu Pha Yon , Phu Phan; 16 ° 56 ' 28.4 " N, 104 ° 04 ' 27.5 " E; CUMZ 16034 View Materials GoogleMaps ; Tak: • Taksin Maharat, Mueang Tak; 16 ° 46 ' 44.3 " N, 98 ° 55 ' 42.7 " E; CUMZ 16035 View Materials GoogleMaps ; Phitsanulok: • Wat Ampharin Khuha (Tham Muang), Noen Maprang; 16 ° 30 ' 13.8 " N, 100 ° 41 ' 20.9 " E; CUMZ 16036 View Materials GoogleMaps ; Nakhon Sawan: • Wat Thep Sathaporn , Banphot Phisai; 15 ° 54 ' 49.5 " N, 99 ° 53 ' 03.9 " E; CUMZ 16037 View Materials GoogleMaps ; Khon Kaen: • Tham Phu Loop, Chum Phae; 16 ° 49 ' 48.6 " N, 101 ° 59 ' 07.8 " E; CUMZ 16038 View Materials GoogleMaps ; • Khon Kaen University , Mueang Khon Kaen; 16 ° 28 ' 27.4 " N, 102 ° 49 ' 18.9 " E; CUMZ 16039 View Materials GoogleMaps ; • Sawathi, Mueang Khon Kaen; CUMZ 16040 View Materials ; Buriram: • Socool Grand Hotel , Nang Rong; 14 ° 38 ' 12.5 " N, 102 ° 47 ' 27.4 " E; CUMZ 16041 View Materials GoogleMaps ; • Wat Khao Phra Ang Khan , Chaloem Phra Kiat; 14 ° 32 ' 04.6 " N, 102 ° 50 ' 04.3 " E; CUMZ 16042 View Materials GoogleMaps ; Chaiyaphum: • Tham Wua Daeng, Phakdi Chumphon; 16 ° 04 ' 35.2 " N, 101 ° 26 ' 23.9 " E; CUMZ 16043 View Materials GoogleMaps ; Nakhon Ratchasima: • Wat Pa Mongkol Tham , Pak Thong Chai; 14 ° 42 ' 07.5 " N, 101 ° 47 ' 12.7 " E; CUMZ 16044 View Materials GoogleMaps ; • Wat Tham Thep Nimit , Pak Chong; 14 ° 36 ' 14.4 " N, 101 ° 33 ' 59.1 " E; CUMZ 16045 View Materials GoogleMaps ; • Soken Villa Khaoyai, Pak Chong; 14 ° 32 ' 06.7 " N, 101 ° 23 ' 37.4 " E; CUMZ 16046 View Materials GoogleMaps ; Sa Kaeo: • Tham Khao Maka, Mueang Sa Kaeo; 13 ° 47 ' 16.5 " N, 101 ° 56 ' 53.8 " E; CUMZ 16047 View Materials GoogleMaps ; • Wat Tham Thep Plub Plueng Thong , Wang Sombun; 13 ° 26 ' 56.9 " N, 102 ° 13 ' 02.9 " E; CUMZ 16048 View Materials GoogleMaps ; • Tham Phet Pho Thong, Khlong Hat; 13 ° 24 ' 50.1 " N, 102 ° 19 ' 31.3 " E; CUMZ 16049 View Materials GoogleMaps ; Chon Buri: • Wat Tham Khao Cha Ang On , Bo Thong; 13 ° 12 ' 33.5 " N, 101 ° 39 ' 05.6 " E; CUM 16050 GoogleMaps ; • Wat Khao Cha Ang , Bo Thong; 13 ° 12 ' 00.9 " N, 101 ° 34 ' 54.6 " E; CUMZ 16051 View Materials GoogleMaps ; Chanthaburi: • Khao Soi Dao Wildlife Sanctuary , Soi Dao; 13 ° 06 ' 15.0 " N, 102 ° 11 ' 39.5 " E; CUMZ 16052 View Materials GoogleMaps ; • Palm plantation near Quan Yin shrine , Makham; 12 ° 43 ' 37.9 " N, 102 ° 08 ' 12.7 " E; CUMZ 16053 View Materials GoogleMaps ; • Wat Laem Sadet , Tha Mai; 12 ° 34 ' 18.9 " N, 101 ° 53 ' 26.3 " E; CUMZ 16054 View Materials GoogleMaps ; • Trok Nong Waterfall, Khlung; 12 ° 32 ' 39.6 " N, 102 ° 14 ' 13.6 " E; CUMZ 16055 View Materials GoogleMaps ; Trat: • Trat 101 Hotel , Mueang Trat; 12 ° 14 ' 31.4 " N, 102 ° 30 ' 40.4 " E; CUMZ 16056 View Materials GoogleMaps ; • Koh Chang , Koh Chang; 12 ° 03 ' 38.8 " N, 102 ° 19 ' 37.1 " E; CUMZ 16057 View Materials GoogleMaps ; • Suanya Koh Kood resort & spa, Koh Kood; 11 ° 39 ' 58.9 " N, 102 ° 32 ' 05.6 " E; CUMZ 16058 View Materials GoogleMaps ; Nakhon Nayok: • Ka Ang Waterfall, Ban Na; 14 ° 20 ' 35.0 " N, 101 ° 07 ' 53.0 " E; CUMZ 16059 View Materials GoogleMaps ; Bangkok: • Chulalongkorn University, Pathum Wan; 13 ° 44 ' 15.5 " N, 100 ° 31 ' 48.9 " E; CUMZ 16060 View Materials GoogleMaps ; Kanchanaburi: • Tham Khao Noi Bureau of Monks , Thong Pha Phum; 14 ° 41 ' 54.1 " N, 98 ° 31 ' 31.4 " E; CUMZ 16061 View Materials GoogleMaps ; • Pilok , Thong Pha Phum; 14 ° 40 ' 16.3 " N, 98 ° 23 ' 04.1 " E; CUMZ 16086 View Materials GoogleMaps ; • Tham Than Lot , Si Sawat; 14 ° 40 ' 17.3 " N, 99 ° 17 ' 19.1 " E; CUMZ 16062 View Materials GoogleMaps ; • Wat Pa Tham Pha Dang , Thong Pha Phum; 14 ° 38 ' 43.6 " N, 98 ° 39 ' 31.8 " E; CUMZ 16063 View Materials GoogleMaps ; • Srinakarin Dam , Si Sawat; 14 ° 24 ' 26.2 " N, 99 ° 07 ' 33.7 " E; CUMZ 16064 View Materials GoogleMaps ; • Hellfire Pass , Sai Yok; 14 ° 22 ' 49.3 " N, 98 ° 55 ' 50.2 " E; CUMZ 16065 View Materials GoogleMaps ; • Wat Pu Ta Khian , Sai Yok; 14 ° 17 ' 22.2 " N, 99 ° 00 ' 28.9 " E; CUMZ 16066 View Materials GoogleMaps ; • Tham Krasae, Sai Yok; 14 ° 06 ' 18.8 " N, 99 ° 09 ' 59.6 " E; CUMZ 16067 View Materials GoogleMaps ; Phetchaburi: • Wat Khao Bandai , Nong Ya Plong; 13 ° 14 ' 09.5 " N, 99 ° 41 ' 21.3 " E; CUMZ 16068 View Materials GoogleMaps ; • Ban Aob Fha Resort, Kaeng Krachan; 12 ° 53 ' 55.4 " N, 99 ° 38 ' 54.8 " E; CUMZ 16069 View Materials GoogleMaps ; Prachuap Khiri Khan: • Wat Tham Khao Mai Ruak , Thap Sakae; 11 ° 25 ' 43.0 " N, 99 ° 36 ' 18.5 " E; CUMZ 16070 View Materials GoogleMaps ; Chumphon: • Tham Pisadan Monastery , Pathio; 10 ° 45 ' 35.6 " N, 99 ° 13 ' 47.5 " E; CUMZ 16071 View Materials , 16072 View Materials GoogleMaps ; • Tham Rub Ror, Tha Sae; 10 ° 37 ' 26.1 " N, 99 ° 06 ' 47.2 " E; CUMZ 16073 View Materials GoogleMaps ; Ranong: • Tham Phra Khayang, Kra Buri; 10 ° 19 ' 36.6 " N, 98 ° 45 ' 53.1 " E; CUMZ 16074 View Materials GoogleMaps ; • Baan Cueng Kao, Mueang Ranong; 9 ° 56 ' 36.4 " N, 98 ° 38 ' 01.7 " E; CUMZ 16084 View Materials GoogleMaps ; Surat Thani: • Khao Sok Evergreen House , Phanom; 8 ° 54 ' 53.8 " N, 98 ° 32 ' 43.0 " E; CUMZ 16075 View Materials GoogleMaps ; • Khao Sok River Home Resort, Phanom; 8 ° 51 ' 02.3 " N, 98 ° 42 ' 21.3 " E; CUMZ 16076 View Materials GoogleMaps ; • Pa Dang, Chai Buri; 8 ° 29 ' 32.3 " N, 98 ° 58 ' 39.0 " E; CUMZ 16077 View Materials GoogleMaps ; Krabi: • Wat Tham Prasat Nalakiring , Plai Phraya; 8 ° 33 ' 30.5 " N, 98 ° 51 ' 44.1 " E; CUMZ 16078 View Materials GoogleMaps ; • Tham Khlang, Ao Luek; 8 ° 20 ' 17.8 " N, 98 ° 44 ' 43.9 " E; CUMZ 16079 View Materials GoogleMaps ; Trang: • Wat Khao Lak Jan , Mueang Trang; 7 ° 42 ' 14.2 " N, 99 ° 43 ' 46.3 " E; CUMZ 16080 View Materials GoogleMaps ; Satun: • Khao Toh Payawang, Mueang Satun; 6 ° 37 ' 39.4 " N, 100 ° 03 ' 43.1 " E; CUMZ 16085 View Materials GoogleMaps ; Pattani: • Chabang Tiko , Mueang Pattani; 6 ° 51 ' 27.3 " N, 101 ° 15 ' 12.2 " E; CUMZ 16081 View Materials , 16082 View Materials GoogleMaps .

Diagnosis.

Notum pale to dark brown with random tiny blackish spots and median dorsal line visible. Hyponotum and foot paler in colour, and with scattered pale blackish spots. Penis clavated with honeycomb-like glans; vas deferens opens at peak. Penial tubules consist of 19–29 long tubules and two short tubules.

External characteristics.

Preserved specimen. Notum pale to dark brown colour with scattered tiny blackish spots. Body elongated ovate, 24–77 mm (mean 48.9 ± 10.0 mm) long and 9–28 mm (mean 14.8 ± 3.8 mm) wide. Some specimens with larger blackish spots scattered along left and right sides of notum. Median dorsal line thin and narrow, and a paler colour than notum. Hyponotum varies from pale yellow to beige or pale brown and with scattered tiny pale blackish spots. Foot pale yellow to beige, and narrower (width 2.0–7.0 mm, mean 3.4 ± 1.0 mm) than right hyponotum width. Male genital pore located closed to base of right lower-tentacle. Female genital pore located approximately midway of body on right hyponotum (Figs 5 A View Figure 5 , 6 A, D View Figure 6 ).

Live specimen. Notum pale to dark brown and with scattered tiny blackish spots. Median dorsal line thin and pale colour. Hyponotum varies from beige to pale brown colour, and with scattered pale blackish spots. Foot beige (Fig. 4 A View Figure 4 ).

Genital organs. Penis acropleurocaulis type; penis base (pb) cylindrical and relatively long. Penis glans (gn) starts from distal extremity of penis base, short cylindrical shaped, honeycomb formation at distal extremity, and bending forming pointed peak. Vas deferens (vd) opens at tip of peak. Peak (pk) cylindrical shaped and located at lateral side of penis glans (Figs 5 B View Figure 5 , 6 B View Figure 6 ). Young specimens with smooth cylindrical penis (without honeycomb formation; Fig. 6 E View Figure 6 ). Penial gland with conical papilla (pa). Penial tubules: 19–29 long tubules (lt) and two short tubules (st). Two long tubules appear distally bifurcated in some specimens (Figs 5 C View Figure 5 , 6 C View Figure 6 ).

Bursa copulatrix duct (db) pyriform shaped, expanded in middle region, and then tapering to narrow tube on both ends. Bursa copulatrix (bc) almost circular shaped and connected to bursa copulatrix duct. Oviduct (ov) and albumen gland (ag) extremely enlarged, soft lobulated, and tufted; oviduct opened at female genital pore (fg). Distal (dd) and proximal (pd) posterior deferens inserted into somewhat oval-shaped prostate gland (pr). Middle deferens (md) penetrates into thick muscular right hyponotum then emerges near male genital pore (mg) before inserting into penis. Canalis junctor (cj) penetrated almost at middle of bursa copulatrix duct. Fertilisation complex (fc) short and small tube; seminal vesicle (sv) thin and curly, and attached to albumen gland with thin connective tissue. Spermioduct (sd) thin, unconvoluted, and contracts into numerous small globular hermaphroditic gland subunits. Hermaphroditic gland (hg) consists of many small subunits (Figs 3 B View Figure 3 , 5 D, E View Figure 5 ).

Radula. Teeth arranged in nearly straight rows, each row containing ~ 100 teeth with half row formula 1–49. Central teeth very small and unicuspid. Lateral and marginal teeth not differentiated, monocuspid, large triangular shaped, and with slightly pointed cusp. From inner to outer, lateromarginal teeth gradually narrower, smaller, and rather pointed cusp, and outermost teeth relatively small (Fig. 7 A View Figure 7 ).

Distribution.

Valiguna siamensis occurs throughout Thailand and some have been reported from Cambodia, Laos, Myanmar, southern China, and Sri Lanka ( Rochebrune 1882 a, b; Gomes et al. 2008; Inkhavilay et al. 2019; Sutcharit et al. 2020 a; GBIF 2023).

Comparative diagnosis.

Valiguna siamensis can be differentiated from V. flava in having a cylindrical penis with honeycomb-like glans, and with 21–31 unequal length (two short, 19–29 long) and two bifurcation penial tubules. In comparison, V. flava has a penis that is initially cylindrical, then tapers and bends with dentate and serrate glans. In addition, V. flava possesses only 15 short penial tubules (Table 4 View Table 4 ; Gomes et al. 2008).

In addition, Valiguna siamensis also differs from V. semicerina sp. nov. and V. crispa sp. nov. in having their hermaphroditic glands composed of small-sized acini. In comparison, V. semicerina sp. nov. possesses hermaphroditic gland formed by medium-sized acini whereas V. crispa sp. nov. possesses hermaphroditic gland made up of large-sized acini (Figs 3 B, C, D View Figure 3 , 5 D View Figure 5 , 8 D View Figure 8 , 9 D View Figure 9 ).

Remarks.

Originally, this species was nominated based on specimens from Phetchaburi Province, Thailand, with a brief description and illustrations. After examining the syntypes, Hoffmann (1925) relocated it to the Semperula and provisionally synonymised three poorly described species Veronicella bocourti Rochebrune, 1882 , Veronicella chaudoensis Rochebrune, 1882 , and Veronicella titanotona Rochebrune, 1882 with this species. Later, Thomé (1984) examined the lectotype of Vaginulus reticulatus Westerlund, 1883 and recognised it as a synonym of Semperula siamensis . Recently Gomes and Thomé (2004) transferred this species to the Valiguna , and Gomes et al. (2008) reported the genitalia based on specimens from Yunnan and Guangxi, China.

It is the predominant leatherleaf slug found in Thailand, occurring in diverse environments, including natural habitats as well as human-modified settings, such as residential areas, gardens, plantations, and greenhouses.