Fastosarion mcdonaldi Stanisic, 1993

Figs. 18, 19H, 20G, 22G–H, 28

Eungarion mcdonaldi Stanisic, 1993: 28, figs. 1a–b, 2, 3a–f, 4a–c; Hyman & Ponder, 2010: 56, figs. 6L–M, 13K, 14E–F, 18C, 19C, 21C; Stanisic et al., 2010: 316–317, 333; Stanisic, 2018: fig. 4F.

Material examined

Types: Holotype: QM MO43309 ( Dalrymple Heights, Eungella National Park, 1000 m, ME QLD).

Paratypes: QM MO43310 .

Non-type material: See table 1.

Diagnosis

External morphology: Shell (fig. 19H) small (11.3–11.6), orange amber, 3.2–3.5 whorls, flattened, thin, base uncalcified, membraneous. Shell sculpture very faint on protoconch, obsolete on teleoconch. Body (fig. 20G) 28–32 mm, reddish brown. Shell lappets and mantle lobes large with pigmented pustules, lappets joined on both sides by a narrow collar.

Genital anatomy: Genitalia (figs. 22G–H, 28) with medium length vagina, very swollen; bursa copulatrix moderately short, duct distinct, bursa elongate oval. Penis long, swollen proximally, internally with 2–4 longitudinal pilasters, internal wall pustulose; 60% of penis contained in penial tunica. Epiphallus approx. equal length to penis, enters penis through small rounded verge; epiphallic caecum of moderate length; flagellum short, slender. Spermatophore simple.

Remarks

Fastosarion mcdonaldi is restricted to the Clarke Ranges in Mideastern Qld, usually found above 900 m altitude (fig. 18). Several other semislugs are found in this region, including F. aquavitae, F. comerfordae, F. ephelis and F. tuljun . Fastosarion mcdonaldi can be distinguished from F. aquavitae, F. comerfordae and F. ephelis by its more flattened, reduced shell and smaller size, and from F. tuljun by its larger size, pustulose shell lappets and more reduced shell with a membraneous base.