Springvalia n. gen., 2019

Zhang, - H., 2019, New taxa of Tateidae (Caenogastropoda, Truncatelloidea) from springs associated with the Great Artesian Basin and Einasleigh Uplands, Queensland, with the description of two related taxa from eastern coastal drainages, Zootaxa 4583 (1), pp. 1-67 : 22

Springvalia n. gen.

Type species: Jardinella isolata Ponder & Clark, 1990

Description. Shell small to moderate in size, elongate-conic, whorls convex, aperture subpyriform, peristome thin to slightly thickened, inner lip narrowly to widely separated from parietal wall; narrowly to moderately umbilicate. Sculpture of growth lines only. Protoconch of 1.3–1.5 whorls, finely punctate. Operculum yellowish, subpyriform, flat to slightly concave, paucispiral with last whorl large, nucleus acentric; inner surface with white smear, without thickening or protuberances. Central teeth of radula with median cusp wider and longer than adjacent cusps; lateral margins medium to narrow; innermost basal cusps short to moderate, outer pair very small to absent (as in Fig. 11A ). Rectum with or without an arch. Male with prostate gland tapering anteriorly and posteriorly, about half in mantle roof. Pallial vas deferens straight or slightly undulating. Penis broadly expanded and flattened distally, rapidly tapering to point or short papilla, glands absent. Female with coiled oviduct forming approximately vertical loop; bursa copulatrix lies beneath albumen gland. Ventral channel with terminal to subterminal opening, vestibule simple to moderately expanded. No cowl or gutter associated with opening.

Distribution. Discharge springs in the Springvale Supergroup in Queensland in the north-western part of the GAB ( Fig. 1 ).

Contained species. Springvalia isolata .

Etymology. Named for the town of Springvale, Queensland. Gender Feminine.

Remarks. The new genus contains only one described species, S. isolata . It differs from Jardinella in having a yellowish operculum, not reddish, and in its elongate-conic shell with the aperture separated from the parietal wall. It also differs in having the penis expanded in the distal part, the ventral channel extending just beyond the capsule gland rather than terminated behind the anterior end as in Jardinella, and in the bursa copulatrix being smaller. Eulodrobia differs from Springvalia in having a tight U-shaped renal oviduct arch that lies in front of the bursa, which is usually larger and more globular in Eulodrobia .

Springvalia isolata is recorded from a new locality below.

Figures

FIGURE 1. Map of the spring supergroups associated with the Great Artesian Basin (GAB) in Queensland, showing the main non-town locations mentioned in the text (squares) and some of the towns in the area (ovals). The pale grey shading is the discharge part of the GAB, the dark grey the recharge part. The inset map of Australia shows the area illustrated. The approximate location of Conondale is indicated by a triangle and Nundle by a star. The spring supergroups are outlined with dotted lines and are as follows: A, Mulligan River; B, Springvale; C, Flinders River; D, Hughenden; E, Barcaldine (see inset at upper right for details); F, Springsure; G, Eulo.

FIGURE 11. Radula of Springvalia isolata (Ponder & Clark, 1990), Warra Station (C.438556). A. Half row of radula. B. detail of lateral and inner marginal teeth. C. detail of outer marginal teeth. Scale bars 10 µm.