Mysticarion hyalina ( Pfeiffer, 1855 )

Hyman, Isabel T. & Ponder, Winston F., 2010, A morphological phylogenetic analysis and generic revision of Australian Helicarionidae (Gastropoda: Pulmonata: Stylommatophora), and an assessment of the relationships of the family 2462, Zootaxa 2462 (1), pp. 1-148: 38-40

publication ID 10.11646/zootaxa.2462.1.1

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Mysticarion hyalina ( Pfeiffer, 1855 )


Mysticarion hyalina ( Pfeiffer, 1855)  

Figures 5C View FIGURE 5 , 7G View FIGURE 7 , 8G View FIGURE 8 , 9G View FIGURE 9 , 12D View FIGURE 12 , 13D View FIGURE 13 , 15G–I View FIGURE 15

Vitrina hyalina Pfeiffer, 1955: 296–297   ; Reeve, 1862: pl. 9, sp. 68; Cox, 1868: 85, pl. 14, figs 7, 7a; Pfeiffer, 1876: 24; Smith, 1992: 244 (in Incertae Sedis).

Vitrina hyalinus: Cox, 1909: 6   .

Helicarion hyalinus: Tryon, 1885: 172   , pl. 39, figs 75–76; Hedley, 1888: 50; Iredale, 1937c: 8.

Material examined. Queensland, Australia: Holotype: BMNH 1983075 (one shell measured, photographed). Moreton Bay .  

Other material: AM C128630 (one specimen dissected, radula examined), Cunningham’s Gap , N of Mt. Mitchell (28º3' S, 152º24' E), on Gap Creek, rainforest with palms, 16 Mar. 1981, W.F. Ponder & party GoogleMaps   .

Description. External morphology: Shell ( Figures 7G View FIGURE 7 , 8G View FIGURE 8 , 9G View FIGURE 9 ) reduced, 4 whorls, light amber, spire and apex slightly raised, shape and sculpture as for genus. Animal ( Figure 5C View FIGURE 5 ) cream. Mantle laps moderately short, wide at base, rapidly tapering, not fused, uniform in colour. Mantle lobes of medium size, left and median mantle lobes fused. Caudal horn medium; caudal foss diamond-shaped slit in tail.

Mantle cavity: As for genus. Mantle with very few visible minor blood vessels, pigmentation of white spots.

Digestive system: As for genus.

Genital system ( Figures 12D View FIGURE 12 , 13D View FIGURE 13 ): Free oviduct long, with one internal longitudinal pilaster (only present after capsular gland). Penis moderately long; epiphallus enters penis through short verge (about a quarter of penis length); penis internally flat, one longitudinal penis pilaster present. Epiphallus approximately equal to penis length, internally with longitudinal pilasters.

Radula   ( Figure 15G–I View FIGURE 15 ): As for genus. Central tooth mesocone similar in length to tooth base. Marginal teeth subdivided into three to four extra teeth. Radular formula ( × at least 116 rows.

Range and habitat. Mysticarion hyalina   has a small range, reaching from around Tenterfield and Casino in northern New South Wales to Cunningham’s Gap just north of the New South Wales-Queensland border. It is found in notophyll to microphyll vine thickets. No microhabitat data are available.

Remarks. This shell was originally described as depressedly globose, with type measurements of 7 mm (diameter) by 3.5 mm (height) ( Pfeiffer 1855). The shell figured by Reeve (1862) matched this description; however, subsequent authors figured a more reduced, more flattened shell ( Cox 1868; Tryon 1885), and Iredale (1937c) synonymised the species with Peloparion helenae   . Examination of the holotype (shell only; Figures 7G View FIGURE 7 , 8G View FIGURE 8 , 9G View FIGURE 9 ) indicated that this species belongs to the genus Mysticarion   .


Australian Museum














Mysticarion hyalina ( Pfeiffer, 1855 )

Hyman, Isabel T. & Ponder, Winston F. 2010

Vitrina hyalinus:

Cox, J. C. 1909: 6

Helicarion hyalinus:

Iredale, T. 1937: 8
Hedley, C. 1888: 50
Tryon, G. W. 1885: 172

Vitrina hyalina

Smith, B. J. 1992: 244
Pfeiffer, L. 1876: 24
Cox, J. C. 1868: 85