Edgbastonia (Barcaldinia) hufferensis Zhang 2019, n. sp.
Creators: name: Zhang, - H.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Littorinimorpha
Tateidae
Edgbastonia
Edgbastonia hufferensis

description: Edgbastonia (Barcaldinia) hufferensis n. sp.
Material examined. Holotype: Queensland, Lake Huffer Station, near base of main spring, approx. 0.3 km from spring head, 22° 15' 32" S, 145° 20' 21" E, sandy substrate, W.F. Ponder & A. Davis, 4 Oct 2002, C.479951. Paratypes: Same data. C.423238, 20+; QM MO85766, 5.
Shell (Fig. 13A). Elongately-ovate, spire outline slightly convex, translucent to opaque. Length 1.7–2.2 mm (mean 2.0 mm), width 1.0– 1.4 mm (mean 1.2 mm). Protoconch about 1.3 whorls, minutely punctate/pustulate. Teleoconch whorls convex, evenly rounded, total number 3.3–4.3 (mean 3.5). Umbilicus represented by chink only. Aperture ovate, inner lip narrow, thin or medium, slightly separated along whole length of parietal wall, outer lip thin or medium. Periostracum moderately developed, white or yellow-brown or brown.
Operculum (Fig. 14A). Transparent, colourless, flat. Inner side lacking white smear or protuberances, simple.
Head-foot and external body. Snout black, tentacles with black pigment around eyes and extending onto tentacles, neck, dorsal and lateral foot and opercular lobes with black pigment spots, mantle roof densely pigmented with black, visceral coil black dorsally.
Mantle cavity. Ctenidium well-developed, filaments 15–20, broadly triangular, apex near right edge. Osphradium narrowly oval, from about middle of ctenidium to towards posterior end. Hypobranchial gland weakly developed. Rectum a simple curve, anus behind mantle collar. Kidney extends for about quarter of length into mantle cavity roof. Renal gland oblique. Pericardium extends for about third of length into mantle cavity roof, abutting posterior end of ctenidium.
Radula (Fig. 15A, B). Central teeth with upper edge heavily indented, cusp formula 4+1+4, basal cusps 2+2, outermost very weak; median cusp pointed, about twice as long as adjacent cusps. Lateral teeth with cusp formula 3–4+1+4–5; main cusp pointed, less than twice as long as adjacent cusps. Inner marginal teeth with 18–20 cusps. Outer marginal teeth with about 22–23 cusps.
Female reproductive system (Fig. 16A, B). Ovary weakly lobed. Renal oviduct forming tight U-shaped arch angled dorso-anteriorly. Seminal receptacle small, oval, at anterior end of bursa. Bursa copulatrix partly overlapping posterior end of albumen gland, oval, shorter than albumen gland, bursal duct enters bursa anteroventrally. Albumen gland behind mantle cavity. Capsule gland with two distinct glandular zones, medium thickness in cross section, markedly indented by rectum. Anterior vestibule not expanded, opening subterminal, on face of capsule gland, short, cowl and/or gutter associated with oviduct opening present.
Male reproductive system (Fig. 17A, 18A). Prostate gland about half in mantle roof, bean-shaped, medium in cross section. Posterior pallial vas deferens with one or two shallow bends near anterior end of prostate gland, anteriorly straight. Penis towards middle of head, well down neck, distal part lacking lobes, S-shaped, terminal papilla long, pointed. Distal part of median section (just behind papilla) black and few black spots proximally, especially on base. Penial duct simple.
Etymology. Named for Lake Huffer Station.
Distribution and habitat. Known only from the main spring, Lake Huffer Station (Fig. 1).
Remarks. This taxon is very similar in shell and radular characters to Ed. (B.) colmani and is also similar, but larger and darker coloured, to Ed. (B.) pallida. It differs from Ed. (B.) colmani and other members of this species group in the molecular results and in having an almost straight pallial vas deferens and penial duct. The apomorphic female system is similar to that of Ed. (B.) colmani. In the molecular analysis, Ed. (B.) hufferensis is well separated from Ed. colmani (see Fig. 31) suggesting that some morphological characters, including the shell size and shape which is similar to several other taxa, may be plesiomorphic.
A discriminant function analysis of shell characters separated this species from others in the Ed. colmanipallida group as detailed below in the remarks under Ed. cf. pallida.
The spring in which this species occurs is approximately seven km SSW of the type locality of Ed. (B.) colmani.
description: Published as part of 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, pp. 1-67 in Zootaxa 4583 (1) on pages 32-38, DOI: 10.11646/zootaxa.4583.1.1, http://zenodo.org/record/2637603