Amplirhagada puescheli, Köhler, 2010

Köhler, Frank, 2010, Uncovering Local Endemism in the Kimberley, Western Australia: Description of New Species of the Genus Amplirhagada Iredale, 1933 (Pulmonata: Camaenidae), Records of the Australian Museum 62 (2), pp. 217-284 : 238-240

Amplirhagada puescheli n.sp.

Type locality ( Fig. 1 ). Western Australia, Kimberley, Bonaparte Archipelago, Montague Sound , unnamed island near Prudhoe Island , 14°25'19"S 125°14'23"E; KC-075 (leg. V. Kessner & A. Longbottom, 21 July 1988) .

Type material. Holotype WAM S34608 (Pl. 1.14) . Paratypes AMS C463750 (8 preserved specimens), FMNH 219290 (18 preserved specimens), WAM S41486 (10 preserved specimens) .

Etymology. Named in honour of Martin Püschel, acknowledging his indispensable help with producing most illustrations used in this publication.

Shell ( Fig. 32A–C , Pl. 1.14). Broadly conical with low to medium spire; thin to solid (translucent). Periphery slightly angulate; upper and basal sectors of whorls rounded. Umbilicus forming a chink or narrowly winding opening, 30–90 percent concealed by columellar reflection. Background colour horn to yellowish brown; with diffuse to well marked, brown sub-sutural and mid-whorl bands being most conspicuous on last whorls; ventral colour horn; outer lip colour same as shell; inner lip translucent, whitish. Protoconch c. 2.5 mm in diameter, comprising 1.5 whorls, smooth. Teleoconch smooth except of faint axial growth lines.Angle of aperture 30°; outer lip rounded, sharp, slightly expanded, slightly reflected; basal node of lip absent weak; palatal node absent. Parietal wall of inner lip inconspicuous.

Pallial morphology. Pallial cavity moderately deep, extending 3 ⁄ 4 whorl. Mantle pigmentation consist of black spots. Kidney extending half of pallial cavity or more.

Genital morphology ( Figs. 30–31 ). Penis curved or sharply bent, of more or less of same length as anterior part of oviduct. Vas deferens coils before entering penis. Penial retractor muscle shorter than penis. Penial verge tiny (barely visible), slender to spatulate with pointed tip. Penial wall pustules small, elongated, arranged in rows over entire length of inner penial wall. Main stimulatory pilaster absent. Vas deferens entering penial sheath in upper third. Vagina moderately wide, posteriorly inflated; inner vaginal wall with undulating longitudinal pilasters. Spermatheca long, clearly extending over base of spermoviduct. Spermathecal duct internally with undulating longitudinal pilasters. Spermathecal head globular to elongately inflated, connected with oviduct by connective tissue, internally smooth with delicate to thin wall. Free oviduct shorter than half of anterior part of oviduct, more or less straight. Spermoviduct of same length as anterior part of oviduct. Talon embedded in albumen gland close to anterior end of albumen gland.

Radular morphology ( Fig. 32E–G ). Rectangular. Tooth formula C+12–15+2–3+19–20. In Average with 156±10 rows of teeth, 32.5±0.4 rows per mm (n = 2). Central teeth with sharply pointed, triangular mesocones, shorter than base of tooth; ectocones absent. Lateral teeth with bluntly pointed, triangular mesocones, length equal to base of tooth; ectocones and endocones vestigial. Marginal teeth with triangular to rounded mesocones; ectocones shorter and narrower than mesocones, simple, pointed; endocones greatly reduced.

Comparative remarks. The present material has been labelled as “ Amplirhagada sp. 70” by Solem. Shell is rather generic and similar to a number of species especially from islands in the Admiralty Gulf. It differs by its sharply bent penis with strongly developed pustulation of inner whorl and absence of well-differentiated main pilaster and a rather tiny verge.

Figures

Figure 1. Distribution of Amplirhagada species in the Kimberley region, northwestern Australia. (1) A. euroa n.sp., Adolphus Island. (2) A. solemiana n.sp., Middle Osborn Island. (3) A. indistincta n.sp., Southwest Osborn Island, Kidney Island. (4) A. combeana, Cassini Island. (5) A. mckenziei n.sp., Oliver Island. (6) A. ponderi n.sp., Kingsmill Island. (7) A. montesquieuana n.sp., Fenelon Island. (8) A. descartesana n.sp., Descartes Island. (9) A. katerana, Katers Island. (10) A. puescheli n.sp., unnamed island near Prudhoe Island. (11) A. decora n.sp., A. kessneri n.sp., Bigge Island. (12) A. berthierana n.sp., Berthier Island. (13) A. lamarckiana n.sp., Lamarck Island.(14) A. anderdonensis n.sp., unnamed island, Anderdon Islands. (15) A. tricenaria n.sp., Prince Frederick Harbour, north of Hunter River mouth. (16) A. regia n.sp., A. boongareensis n.sp., A. gibsoni n.sp., and Amplirhagada sp., Boongaree Island. (17) A. yorkensis n.sp., Coronation Island. (18) A. buffonensis n.sp., Buffon Island. (19) A. uwinsensis n.sp., Uwins Island. (20) A. sphaeroidea n.sp., St. Andrews Island. (21) A. basilica n.sp., and A. camdenensis n.sp., Augustus Island. (22) A. kimberleyana n.sp., NW of Wilson Point. (23) A. gemina n.sp., 1.5 km SE of Hall Point. (24) A. dubitabile n.sp., Steep Island. (25) A. napierana, north Napier ranges. (26) A. percita, Napier ranges. (27) A. castra, A. mitchelliana, and A. varia, Mitchell Plateau.

Figure 30. Genitalia of Amplirhagada puescheli n.sp., paratype AMS C463750 (21 July, scale 10 mm). Compare with Fig. 3 for labelling of structures.

Figure 31. Interior of penial chamber of Amplirhagada puescheli n.sp., paratypeAMS C463750 (21 July,scale 5 mm).Compare with Fig. 4 for labelling of structures.

Figure 32. SEM photographs of Amplirhagada puescheli, paratype AMS C463750. (A–C) Shell: (A) apical whorl viewed from above (scale 200 µm); (B) sculpture on first three whorls viewed from above (scale 200 µm); (C) sculpture on last whorl (scale 200 µm). (D) Jaw, broken (scale 100 µm). (E–G) Radula: (E) central and inner lateral teeth (scale 10 µm); (F) close-up of lateral teeth (scale 10 µm); (G) outer lateral and inner marginal teeth (scale 20 µm).