Vitrinula glutinosa (Metcalfe, 1851)
“A bright shell, resembling a thin film of glue, with a keel of a darker shade; slightly indented above and below the keel, the indentation elegantly crossed with slight striae, the effect of which, as well as the darker line, is partially visible throughout the sutures.” (Metcalfe, 1851)
“Mr. Everett collected a fine set of this species, which has a very conspicuous canaliculate groove above the keel of the shell, and this on the upper whorls produces a raised beading at the suture. In the same locality he obtained a beautiful dark madder-brown variety, similar in coloration to X. decrespignyi, which retains exactly the form of the typical shell, and is not separable by any other character, I would designate this as var. rubra.” (Godwin-Austen, 1891)
“Einzelne sehr schwache Spiralstreifen sind stellenweise zu sehen, bei anderen Exemplaren aber mit einer gewöhnhchen Lupe nicht zu erkennen , daher ich sie aus der Diagnose weggelassen habe.” (Martens, 1867)
“With this species I identify with some doubt a broken shell, wanting part of the columellar margin and adjacent part of the peristome; it is very thin and pellucid, light greenish yellow, the keel but slightly indicated; if belonging to this species, it is an albino.” (Schepman, 1896)
Metcalfe (1851) original descriptions on Helix glutinosa – “H. testâ orbiculato-convexâ, angustè perforatâ, tenui, nitidissimâ, diaphanâ, pallidè brunnea, carinatâ; supra carinam fuscâ, infraque lineâ angustâ flavescente, ornatâ; spira conoideâ, obtusâ; anfractibus 5 parum convexis; ad carinam supra infraque lineâ impressâ circulari, striisque numerosissimis transversis notatâ; peristomate simplici, acuto, margine columellari vix reflexo.”
Martens (1867) descriptions on Nanina glutinosa – “Testa perforata, conoideo-lenticularis, carinata, tenuis, lubrice-nitida, oblique striatula, fulva, carina castanea; spira breviter conoidea, anfr. 5-6, plani, ultimus supra et infra subaequaliter convexus, carina grossa cinguliformi, antice haud descendens; aperture vix obliqua, subrhombea; peristoma acutum, rectum, margine basali valde arcuato, columellari ad insertionem brevissime reflexiusculo.”
Tryon (1886) descriptions on Nanina (Xesta) glutinosa – “Perforate, thin, with very minute spiral lines, shining; light chestnut-color above, becoming yellowish brown below the carina, which carries a dark chestnut band, more or less distinctly margined below with yellow; wrhorls 6, the last with compressed peripheral carina.”
“Shell-lobes as in Macrochlamys; the right dorsal lobe large; the left differs from above and is divided in two parts, of which the anterior is narrow and long, the posterior being very rudimentary. Situated between, there is a very well-defined long tongue-like shell-lobe. The living shell must be very prettily mottled, as the hlack-spotted integuments of the respiratory sac would show through the glassy thin shell. Mucous gland with an overhanging lobe, the aperture does not extend down to the sole of the foot. Odontophore has plain, unicuspid, triangular-shaped centrals; about eighty of the outer laterals are bicuspid, and those on the side of the radula are very minute: (110 . 14 . 1 . 14 . 110) and (124 . 1 . 124.)” (Godwin-Austen, 1891)
“Jaw slightly curved on the cutting-edge, with only the slightest indication of a central projection. The generative organs approach nearest to Macrochlamys of the Indian Region, but variation presents itself in the male organ. It is bent upon itself, the kale-sac is short and knob-like, and where the retractor muscle is given off there is a simple bend, with no projection, and doubling together of the tube and the formation of a coil as in so many of the Indian genera and species. The drawings given by Professor Semper of the reproductive organs of Xesta, which include X. citrina and X. mindanaensis, particularly of the latter, agree with X. glutinosa. As regards the odontophore, it is similar to that of X. citrina in the simple centrals, which I consider to be the type of the genus; it is also the type of X. mindanaensis. It may be noted that the odontophores of the Indian species X. belangeri, tranquebarica, and maderaspatana differ considerably in their tricuspid form, and will, I think, prove different in other characters.” (Godwin-Austen, 1891)
Helix glutinosa – “Long. 1 1/10; lat. 1; alt. 6/10 unc.” (Metcalfe, 1851); Nanina glutinosa – “Diam. maj. 21-27, min. 18-23, alt. 13-15; apert. long. 12-14, lat. 10-12 Mill.” (Martens, 1867); Nanina (Xesta) glutinosa – “Diam. 28, alt. 14.5 mill.” (Tryon, 1886)
Type locality – “Borneo” leg. W. J. Hamilton/Nov. 1850 (Metcalfe, 1851)
Other localities – “Territorio di Sarawak” leg. Doria e Beccari (Issel, 1874); “Niah Hills” leg. A. Everett (Godwin-Austen, 1891); “Mount Liang Koeboeng” leg. Büttikofer (Schepman, 1896)
Type locality – “Borneo” leg. W. J. Hamilton/Nov. 1850 (Metcalfe, 1851)
Other localities – “Territorio di Sarawak” leg. Doria e Beccari (Issel, 1874); “Niah Hills” leg. A. Everett (Godwin-Austen, 1891); “Mount Liang Koeboeng” leg. Büttikofer (Schepman, 1896)
Niah, Sarawak, MALAYSIA