Contributions to Zoology, 86 (1) – 2017Isabel T Hyman; Irantzu de la Iglesia Lamborena; Frank Köhler: Molecular phylogenetics and systematic revision of the south-eastern Australian Helicarionidae (Gastropoda, Stylommatophora)
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Brevisentis kaputarensis Shea and Griffiths, 2010

Figs 7D, 8D-F, 9C, 13

Brevisentis kaputarensis Shea and Griffiths, 2010 in Stanisic et al., 2010: 280-281.

 

Material examined. Holotype. QMMO32629 (Dawsons Spring, Mt Kaputar, NE NSW, 30°16’S, 150°10’E, fern gully/remnant rainforest, under logs, in litter, leg. Stanisic et al., 8/11/1983; Fig. 7D).

Paratypes. QMMO49155, QMMO78908.

Non-type material. See Table S1.

 

Diagnosis. Shell. Medium size, 4.6-5.2 whorls, pale amber, discoidal with a low spire; whorls rounded; protoconch with very fine spiral grooves, teleoconch with spiral rows of very fine pustules; umbilicus narrow (Table 3, Figs 7D, 8D-F).

Animal. Body dark grey; sole with a paler mid field; caudal horn moderately small. Mantle lobes moderately small, not fused; Shell lappets narrow, triangular, right lappet moderately long, left lappet moderately short (Fig. 9C).

Genitalia. Penis relatively short, thick, tubular; penis and sometimes part of epiphallus enclosed in penial tunica. Penis interior with anastomosing ridges, primarily longitudinal. Epiphallus relatively short, approximately twice penis length, entering penis apically through a verge of variable length (1/3 to nearly complete penis length). Epiphallic flagellum with small internal cryptae near epiphallus, tail of flagellum without visible cryptae. Spermatophore with smooth capsule; one complex branching spine on tail-pipe near capsule; opposite, fourteen increasingly smaller and simpler short branching spines spiraling around tail-pipe only (Fig. 13).

FIG2

Fig. 13. Reproductive anatomy of Brevisentis kaputarensis, QM MO78908. A. Genitalia. B. Penial complex. C-D. Penial interior. E. Spermatophore. Abbreviations: alb, albumen gland; bc, bursa copulatrix; cg, capsule gland; ep, epiphallus; fl, flagellum; her, hermaphroditic duct; ov, ovotestis; p, penis; pp, penial pilasters; pr, prostate; prm, penial retractor muscle; pt, penial tunica; pv, penial verge; ut, uterus; vd, vas deferens. Scale bars = 1 mm.

Remarks. Known only from Nandewar Range, northeastern NSW (Fig. 11), B. kaputarensis is the smallest species of this genus, found in dry woodland, in rock piles and leaf litter. This species has a larger penial verge than its congeners, and the penis interior has anastomosing ridges rather than pustules.