Edgbastonia (Barcaldinia) hufferensis, Zhang, 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 : 32-38

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 .

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 13. Shells of species of Edgbastonia (Barcaldonia) n. subgen. A. Edgbastonia (B.) hufferensis n. sp., holotype (C.479951). B. Edgbastonia (B.) cf. pallida (Ponder & Clark, 1990) (C. 479947). C, D. Edgbastonia (B.) routhensis n. sp., Routh Stn, C, holotype (C.479960). D. paratype (C.448850). E, Edgbastonia (B.) pagoda n. sp., holotype, Myross Stn (C.479948). F. Edgbastonia (B.) rugosa n. sp., holotype, Myross Stn (C.479949). G. Edgbastonia (B.) corrugata umbilicata n. sp., holotype, Myross Stn (C.479946). H. Edgbastonia? conjuboyensis, holotype, Conjuboy Stn (C.479956). I. Edgbastonia (B.) chillagoensis, holotype, Chillagoe Stn (C.479958). Scale bar 1 mm.

FIGURE 14. Opercula of species of Edgbastonia (Barcaldonia) n. subgen. A. Edgbastonia (B.) hufferensis n. sp., internal view (C.423238). B, C. Edgbastonia (B.) cf. pallida (Ponder & Clark, 1990). B. External view. C. Internal view (C. 457755). D, E. Edgbastonia (B.) routhensis n. sp. D. External view. E. Internal view (C438551). F, G. Edgbastonia (B.) pagoda n. sp. F. External view. G. Internal view (C.457756). H. Edgbastonia (B.) rugosa n. sp., internal view (C.457753). I, J. Edgbastonia (B.) corrugata umbilicata n. subsp. I. External view. J. Internal view (C.415845). K, L. Edgbastonia? conjuboyensis n. sp. K. External view. L. Internal view (C.445416). M, N. Edgbastonia (B.) chillagoensis n. sp. M. External view. N. Internal view (C.438557). Scale bar 200 µm.

FIGURE 15. Radulae of species of Edgbastonia (Barcaldonia) n. subgen. A, B. Edgbastonia hufferensis n. sp. A. Part of half row showing inner marginal, lateral and central teeth. B. Lateral teeth (C.423238). C, D. Edgbastonia (B.) cf. pallida (Ponder & Clark, 1990). C. Half row. D. Lateral and marginal teeth (C.457755). E, F. Edgbastonia (B.) routhensis n. sp. E. Part of half row. F. detail of central teeth (C.438551). G–I. Edgbastonia (B.) pagoda n. sp. G. Detail of central teeth, H. Half row. I. Lateral teeth (C.457756). Scale bar 10 µm.

FIGURE 16. Female reproductive system of species of Edgbastonia (Barcaldonia) n. subgen., shown from left side. A, B. Edgbastonia (B.) hufferensis n. sp. (C.423238). C, F. Edgbastonia (B.) cf. pallida (Ponder & Clark, 1990) (C.457755). D, E. Edgbastonia (B.) routhensis n. sp. (C.438551). G, H, Edgbastonia (B.) pagoda n. sp. (C.457756). I, L. Edgbastonia (B.) rugosa n. sp. (C.457753). J, K. Edgbastonia (B.) corrugata umbilicata n. subsp., (C.415845). M, N. Edgbastonia? conjuboyensis n. sp. (C.445416). O, P. Edgbastonia (B.) chillagoensis n. sp. (C.438557). Abbreviations: ag—albumen gland; bc—bursa copulatrix; cg—capsule gland; o—opening of oviduct; pw—posterior wall of mantle cavity; ro—renal oviduct; sr—seminal receptacle; vc—ventral channel. Scale bars 200 µm.

FIGURE 17. Prostate and vas deferens of species of Edgbastonia (Barcaldonia) n. subgen. A. Edgbastonia (B.) hufferensis n. sp. (C.423238). B. Edgbastonia (B.) cf. pallida (Ponder & Clark, 1990) (C.457755). C. Edgbastonia (B.) routhensis n. sp. (C.438551). D. Edgbastonia (B.) pagoda n. sp. (C.457756). E. Edgbastonia (B.) rugosa n. sp. (C.457753). F. Edgbastonia (B.) corrugata umbilicata n. subsp. (C.415845). G. Edgbastonia? conjuboyensis n. sp. (C. 445416). H. Edgbastonia (B.) chillagoensis n. sp. (C.438557). Abbreviations: avd—anterior vas deferens; pg—prostate gland; pvd—posterior vas deferens; pw—position of posterior wall of pallial cavity. Scale bars 200 µm.

FIGURE 18. Penis and vas deferens of species of Edgbastonia (Barcaldonia) n. subgen. A. Edgbastonia (B.) hufferensis n. sp. (C.423238). B, C. Edgbastonia (B.) cf. pallida (Ponder & Clark, 1990) (C.457755). D, Edgbastonia (B.) routhensis n. sp. (C.438551). E. Edgbastonia (B.) pagoda n. sp. (C.457756). F. Edgbastonia (B.) rugosa n. sp. (C.457753). G. Edgbastonia (B.) corrugata umbilicata n. subsp. H, I. Edgbastonia? conjuboyensis n. sp. (C.445416). J, K. Edgbastonia (B.) chilagoensis n. sp. (C.438557). Abbreviations: avd—anterior vas deferens; ngl—non-glandular lobe; p—papilla; pd—penial duct. Scale bars 200 µm.

FIGURE 31. Phylogram of Australian tateid spring taxa and selected outgroups with Bayesian posterior probability values (shown above nodes) and RAxML bootstrap support values (shown below nodes). Posterior probability values below 0.85 and bootstrap support below 70% are not shown, and asterisks indicate optimal support. Two parallel diagonal lines on branches indicate those branches have been shortened. Bayesian tree is shown. The grey box indicates the clade encompassing all Queensland spring taxa, the monotypic Nundalia from New South Wales, and the coastal, riverine genus Jardinella from northern Queensland. All taxa included in this clade are illustrated to the right and where possible aligned with their respective placement in the phylogram. Abbreviations: C—Carnarvoncochlea; E. (B.)—Edgbastonia (Barcaldinia); E. (E.) -Edgbastonia (Edgbastonia); NQ—North Queensland (coastal); NSW—New South Wales; S—Springvalia. Names of imaged taxa are indicated, next to the illustrations, by the three first letters in their species (or subspecies) name, or, when identical, the four first letters. For details of superscript numbers 1–40, see Table 20.