Amplirhagada discoidea, Köhler, 2011

Köhler, Frank, 2011, Descriptions of New Species of the Diverse and Endemic Land Snail Amplirhagada Iredale, 1933 from Rainforest Patches across the Kimberley, Western Australia (Pulmonata: Camaenidae), Records of the Australian Museum 63 (2), pp. 167-202 : 181

publication ID

https://doi.org/ 10.3853/j.0067-1975.63.2011.1581

publication LSID

lsid:zoobank.org:pub:1BCD4085-D2B9-400D-B504-8C85C30303D6

persistent identifier

https://treatment.plazi.org/id/19B6CE05-8E1C-41D7-A3EA-067068A85067

taxon LSID

lsid:zoobank.org:act:19B6CE05-8E1C-41D7-A3EA-067068A85067

treatment provided by

Felipe

scientific name

Amplirhagada discoidea
status

sp. nov.

Amplirhagada discoidea View in CoL n.sp.

Type locality. Western Australia, NW Kimberley mainland, Scott Strait, 8.3 km E of Savage Hill on Bigge Island ; 14°37'15"S 125°15'15"E ( RFS 05-2 ; coll. V. Kessner, 5 Jun 1987) ( Fig. 1 View Figure 1 ) GoogleMaps .

Type material. Holotype WAM S34722 View Materials (preserved specimen) (Pl. 1.7; Table 1) . Paratypes AM C.472927 (3 preserved specimens), WAM S34723 View Materials (5 preserved specimens) , FMNH 220064 About FMNH (8 preserved specimens) , AM C.472928 (6 dried shells), WAM S34724 View Materials (12 dried shells) , FMNH 220063 About FMNH (20 dried shells) .

Etymology. In reference to discoidal shape of shell.

Description

Shell (Pl. 1.7; Fig. 21A–D View Figure 21 ). Broadly conical with low spire, discoid. Rather thin but solid, slightly translucent. Periphery angulate; upper and basal sectors slightly flattened. Umbilicus 10–20% concealed by columellar reflection. Background colour light yellowish brown; peripheral band conspicuous, well developed, moderately broad, clearly visible on last whorl only; sub-sutural band broad, well developed, brown, visible on last whorl only; both bands may blend into each other covering shell with a dark brown tone; outer and inner lip colour white, conspicuously contrasting shell colour. Protoconch 3.1 mm in diameter, comprising about one whorl, with inconspicuous radially elongated pustulations. Teleoconch almost smooth, with very faint, regular axial growth lines. Angle of aperture about 45 degrees; outer lip thin, well rounded, slightly expanded, not or slightly reflected; basal node. Parietal wall of inner lip thin. Average shell size 12.4±0.7 × 20.9± 0.9 mm ( Table 1).

Radular and jaw morphology ( Fig. 21 E–G View Figure 21 ). Tooth formula C + 13–15 + 4 + 16–22, with 120 rows of teeth (n = 2). Jaw with c. 10 plates.

Genital morphology ( Figs 20 View Figure 20 , 22 View Figure 22 ). Penis rather straight, tubular, about as long as anterior part of oviduct. Penial sheath very delicate, distally thicker. Length of penial retractor muscle equivalent to about 1/3 of length of penial complex. Penial verge elongately conical, with blunt tip, short, extending about ¼ of length of penial chamber. Inner penial wall entirely covered by densely arranged, very small pustules. Several more or less developed longitudinal

V

Royal British Columbia Museum - Herbarium

WAM

Western Australian Museum

AM

Australian Museum

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