Exiligada qualis, IREDALE, 1939

Criscione, Francesco, Law, Margot Louisa & Köhler, Frank, 2012, Land snail diversity in the monsoon tropics of Northern Australia: revision of the genus Exiligada Iredale, 1939 (Mollusca: Pulmonata: Camaenidae), with description of 13 new species, Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 166 (4), pp. 689-722: 710-711

publication ID

http://doi.org/ 10.1111/j.1096-3642.2012.00863.x

persistent identifier

http://treatment.plazi.org/id/03E9878D-FFCF-FF84-72A0-A6805A61FEB9

treatment provided by

Marcus

scientific name

Exiligada qualis
status

 

EXILIGADA QUALIS IREDALE, 1939  

( FIGS 4E View Figure 4 , 6E View Figure 6 , 23A–C View Figure 23 , 24 View Figure 24 )

Exiligada qualis Iredale, 1939: 69   , plate V, figure 2. Exiligada negriensis   – Solem, 1984: 673–677,

figure 174 (d–f) (in part).

Material examined: AUSTRALIA, NT, VRD, holotype   from 25 miles north of Ord River Station , Negri outstation (coll. R. Helms, 1896), dry ( AM C.64866), 43 paratypes (same data as for holotype) ( AM C.64915); 35 km north of Nicholson H /S, Duncan Rd, limestone cliffs, 500 m west of road, under rocks at dripline of cave overhang, 17°42 ′ 45 ′′ S, 128°50 ′ 10 ′′ E (coll. R. Crookshanks, 28.i.2005), three dry, one wet ( AMS C.443304) GoogleMaps   .

Duncan Rd , old Ord River homestead, Forrest Ck, 70 km north of Nicholson homestead, under limestone rocks and concrete of old structures, 17°23 ′ 56 ′′ S, 128°52 ′ 01 ′′ E (coll. R. Crookshanks, 29.i.2005), one wet ( AM C.475758) GoogleMaps   .

Description: Shell ( Figs 4E View Figure 4 , 6E View Figure 6 , 23A–C View Figure 23 ). Moderately large, moderately elevated, moderately thin; teleoconch with short regularly alternate microdepressions. Shell background colour yellowish horn fading to whitish towards shell base, with few conspicuous to moderately faint continuous brown-reddish spiral bands; maculations absent.

Genitalia ( Fig. 24 View Figure 24 ). Epiphallus as long as penis. Vas deferens entering penial sheath from halfway up. Penis six times longer than wide, not coiled inside sheath, with inner wall supporting a large apical stimulatory pilaster and (several) basal pilasters. Vagina two thirds of penis and free oviduct, bursa copulatrix with no well-differentiated end.

Remarks: The type locality is identical to that of E. negriensis   and as such also restricted to an area close to the Negri River between the point where the Negri River flows into the Ord River in WA (17°04 ′ 11 ′′ S, 128°53 ′ 10 ′′ E) and the Duncan Highway bridge over the Negri River near the WA / NT border relative to width (pl/pw) and epiphallus length relative to penis (el/pl) average. Inner penial wall sculpture similar to those of E. brabyi   , to be distinguished by posterior pilaster being continuous. Vagina length relative to penis (vl/pl) average and vagina length relative to free oviduct (vl/ol) half the average.

AM

Australian Museum

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Stylommatophora

Family

Camaenidae

Genus

Exiligada

Loc

Exiligada qualis

Criscione, Francesco, Law, Margot Louisa & Köhler, Frank 2012
2012
Loc

Exiligada qualis

Solem A 1984: 673
Iredale T 1939: 69
1939