Fastosarion sarina, Hyman & Köhler, 2019

Hyman, Isabel T. & Köhler, Frank, 2019, Phylogeny and systematic revision of the helicarionid semislugs of eastern Queensland (Stylommatophora, Helicarionidae), Contributions to Zoology 88 (4), pp. 351-451 : 437

Fastosarion sarina sp. nov.

Figs. 18 , 19N , 31C–E

Etymology

For Sarina, the type locality; noun in apposition.

Material examined

Types: Holotype: QM MO85840 ( Sarina, SW at Blue Mts , c. 0.6 km SE, 21° 36'S, 148° 58' E, coll. 23 Mar 2000, G. Monteith).

Paratypes: QM MO77305 (same data as holotype) .

Non-type material: See table 1 .

Diagnosis

External morphology: Shell (fig. 19N) medium-sized (17.7 mm), amber, 3.2 whorls, flattened, last whorl very large. Body 28–30 mm long, colour (in ethanol) light grey-brown, sole orange-brown, keel cream, right mantle lobe moderately large, left and median lobes used to form a large cephalic shield, shell lappets moderately large, dark brown, paler at tips, with black markings, left lappet with three rows of warts, right lappet smooth. Tail strongly keeled, slime network moderately strong.

Genital anatomy: Genitalia (fig.31C–E) with medium length vagina; bursa copulatrix long, duct broad, bursa elongate. Penis moderately long, base narrow, increasing in diameter, inner penial wall sculptured with transverse ridges, penis interior with three transversely ridged longitudinal pilasters; 85% of penis contained in penial tunica. Epiphallus equal in length to penis, entering penis through a simple pore; epiphallus 2 longer than epiphallus 1; epiphallic caecum long; flagellum long, slender. Spermatophore with simple tail-pipe.

Remarks

This species (identified above as ‘ Helicarionidae sp. Sarina’) is known only from a single location, in rainforest above 800 m altitude at Blue Mountain southwest of Sarina (fig. 18). Fastosarion alyssa and F. aquavitae are found nearby at Sarina. The former can easily be distinguished by its smaller size and the latter by its more globose shell; however, neither are recorded from Blue Mountain.

Figures

FIGURE 18 Distribution of Clade B species. █ = F.alyssa, ▼ = F.deensis, × = F.ephelis, ♢ = F.hannianus, ▲ = F. insularis, ◻ = F.katatonos, ∆ = F.longimentula, ● = F.mcdonaldi, ♠ = F.minerva, ◆ = F.papillosus, ♣ = F.pustulosus, ♥ = F.rowani, Ǫ = F.sarina, ▽ = F.tuljun.

FIGURE 19 Shells of Clade B species. A. Fastosarion alyssa (type locality of D.peterbrocki), NMV F230748. B. Fastosarion deensis, MO85834 (holotype). C. Fastosarion ephelis, MO85835 (holotype). D. Fastosarion hannianus, MO56684.E. Fastosarion insularis sp. nov., MO76354. F. Fastosarion katatonos, MO85837 (holotype). G.Fastosarion longimentula, MO65313.H. Fastosarion mcdonaldi, MO50434.I. Fastosarion minerva, MO78358. J.Fastosarion papillosus, MO78896 (Mt Superbus).K.Fastosarion papillosus, MO62397 (Kroombit Tops). L.Fastosarion pustulosus, MO78894 (Kalpowar SF).M. Fastosarion rowani, MO85839 (holotype). N. Fastosarion sarina, MO85840 (holotype).O. Fastosarion tujun (Denham Range), MO76081 (holotype). Scale bar 5 mm.

FIGURE 31 Genitalia.A–B. F.rowani, MO85839,Gladstone. C–E.F.sarina, MO85840, Sarina.A, C. Reproductive system.Arrows show the junction of the penis and epiphallus.B, D.Penis interior. E. spermatophore. Scale bars 1 mm (C–E), 2 mm (A–B).