Glessula gemma (Reeve, 1850)

Man, Nem Sian, Ablett, Jonathan D., Lwin, Ngwe, Sutcharit, Chirasak & Panha, Somsak, 2024, Contributions on a small collection of the former Subulinidae Fischer & Crosse, 1877 (Eupulmonata, Achatinoidea) with catalogue of the Glessula and Rishetia species recorded from Myanmar, ZooKeys 1208, pp. 173-239 : 173-239

publication ID

https://doi.org/ 10.3897/zookeys.1208.116083

publication LSID

lsid:zoobank.org:pub:0215503D-E8B4-4179-89F6-FB2CCC59F37E

DOI

https://doi.org/10.5281/zenodo.13138377

persistent identifier

https://treatment.plazi.org/id/564D9BB6-9C40-5DD7-A49E-44B00E351BD9

treatment provided by

ZooKeys by Pensoft

scientific name

Glessula gemma (Reeve, 1850)
status

 

11 Glessula gemma (Reeve, 1850)

Fig. 7 A – D View Figure 7 , Table 1 View Table 1

Achatina gemma Reeve, 1850: pl. 22, fig. 123 (Benson MSS). Type locality: Barrackpore, Bengal. Pfeiffer 1853: 496. Benson 1860: 464. View in CoL

Oleacina (Electra) gemma — Adams and Adams 1855: 105.

Achatina (Electra) gemma View in CoL — Pfeiffer 1856: 168. Hanley and Theobald 1870: 17, pl. 36, fig. 7.

Cionella (Glessula) gemma — von Martens 1860: 254.

Stenogyra (Glessula) gemma — Nevill 1878: 170.

Glessula gemma View in CoL — Pfeiffer and Clessin 1881: 331. Beddome 1906: 169. Pilsbry 1909: 97, pl. 13, figs 1, 3. Gude 1914: 428. Godwin-Austen 1920: 22. Raheem et al. 2014: 124, figs 78 b, 79 c, d. Preece et al. 2022: 235, 236.

Type specimen.

The type specimen could not be located in the UMZC nor in the NHMUK collections ( Raheem et al. 2014; Preece et al. 2022).

Other material.

NHMUK 1946.10. 16.45–53 (9 shells; Fig. 7 A, B View Figure 7 ) ex. Benson collection from Bengal. Montawa Cave, Taunggyi City, Taunggyi District, Shan State, Myanmar. (20 ° 45 ' 15.9 " N, 97 ° 1 ' 3.4 " E): CUMZ 13069 (5 shells; Fig. 7 C, D View Figure 7 ).

Description.

Shell elongate ovate, solid, purple-black or yellowish colour, and with 6 ½ – 7 whorls. Apex blunt; protoconch ~ 2 whorls with smooth surface; subsequent whorls with smooth and glossy to weakly radial ribs. Spire grows evenly, is high and obtuse; whorls flatly convex; suture wide and shallow; last two whorls almost equal and largest. Aperture obliquely ovate; peristome moderately thickened and white; columella short, concave, and truncated. Umbilicus closed.

Distribution.

Glessula gemma was originally described from India and then its range extended to Bangladesh ( Gude 1914; Godwin-Austen 1920; Raheem et al. 2014). In Myanmar, this species has been recorded from the Rakhine State and now in the Shan State.

Remarks.

The historical specimens NHMUK 1946.10. 16.45– 53 ex. Benson collection from Bengal is illustrated herein as an example.

Our specimens match well with the authenticated Reeve specimen of this species, although it is far from the type locality and previously reported region in the Rakhine State, Myanmar. Among all the Glessula species from Myanmar, G. gemma is superficially similar to G. latestriata from Shan State. In comparison, G. gemma has smooth shell surfaces, less turreted spire, and a shallow suture, while G. latestriata possesses well-developed grooves, a turreted and more attenuated spire, and a deeper suture.

NHMUK

Natural History Museum, London

CUMZ

Cameroon University, Museum of Zoology

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

SuperOrder

Eupulmonata

Order

Stylommatophora

SuperFamily

Achatinoidea

Family

Subulinidae

Genus

Glessula

Loc

Glessula gemma (Reeve, 1850)

Man, Nem Sian, Ablett, Jonathan D., Lwin, Ngwe, Sutcharit, Chirasak & Panha, Somsak 2024
2024
Loc

Glessula gemma

Preece RC & White TS & Raheem DC & Ketchum H & Ablett J & Taylor H & Naggs F 2022: 235
Raheem DC & Taylor H & Ablett J & Preece RC & Aravind NA & Naggs F 2014: 124
Godwin-Austen HH 1920: 22
Gude GK 1914: 428
Beddome CR 1906: 169
Pfeiffer L & Clessin S 1881: 331
1881
Loc

Stenogyra (Glessula) gemma

Nevill G 1878: 170
1878
Loc

Cionella (Glessula) gemma

von Martens E 1860: 254
1860
Loc

Achatina (Electra) gemma

Hanley SCT & Theobald W (1870 1870: 17
Pfeiffer L 1856: 168
1856
Loc

Oleacina (Electra) gemma

Adams H & Adams A 1855: 105
1855
Loc

Achatina gemma

Benson WH 1860: 464
Pfeiffer L 1853: 496
1853