Edgbastonia (Barcaldinia) routhensis, 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: 43-44

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Edgbastonia (Barcaldinia) routhensis

n. sp.

Edgbastonia (Barcaldinia) routhensis   n. sp.

Material examined. Holotype: Queensland, W. of Georgetown, Routh HS, Big Spring , 18° 20' 28" S, 143° 41' 01" E, on mud and vegetation in and around spring seepages, W.F. Ponder, J.B. Studdert, C. Slatyer & J.M. Ponder, 20 Aug 2004, C.479960 GoogleMaps   . Paratypes: Same data, C.438551, 50+; QM MO85769, 5. Other material examined: Queensland, E of Georgetown , Routh HS, Mud Spring , 18° 19' 34" S, 143° 40' 35" E, spring head, in mud and water, W.F. Ponder, J.B. Studdert, C. Slatyer & J.M. Ponder, 20 Aug 2004 GoogleMaps   , C.438552, 18; Mud Spring , 18° 19' 34" S, 143° 40' 35" E, small seepage down from spring head, in mud and water, Queensland, W.F. Ponder, J.B. Studdert, C. Slatyer & J.M. Ponder, 20 Aug 2004 GoogleMaps   , C.448850, 20+.

Shell ( Fig. 13C, D View FIGURE 13 ). Ovate-conic, spire outline moderately convex, normally coiled, translucent. Length 1.7– 2.3 mm (mean 2.0 mm), width 1.1–1.6 mm (mean 1.4 mm). Protoconch 1.3–1.5 whorls, minutely punctate and irregularly rugose in some specimens. Teleoconch whorls strongly convex, evenly rounded, total number 1.2–4.2 (mean 3.8). 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 very thin and inconspicuous, colourless or white or yellow-brown.

Operculum ( Fig. 14D, E View FIGURE 14 ). Transparent, pale yellow, flat. Inner side simple, lacking white smear or protuberance.

Head-foot and external body. Snout unpigmented, tentacles, neck and opercular lobes pigmented, dorsal and lateral foot unpigmented, mantle roof and visceral coil densely pigmented to black.

Mantle cavity. Ctenidium well-developed, filaments 16–23, broadly triangular, apex towards right. Osphradium narrowly oval, towards posterior end of ctenidium, length relative to gill 0.21–0.29. Hypobranchial gland thin (poorly developed). Rectum with U-shaped bend, faecal pellets longitudinally orientated, anus behind mantle collar. Kidney extends for about quarter of length into mantle cavity roof, or half or more in roof of mantle cavity. Renal gland longitudinal. Pericardium extends for about quarter of length into mantle cavity roof or half or more in roof of mantle cavity, overlapping posterior end of ctenidium or abutting posterior end of ctenidium.

Radula ( Fig. 15E, F View FIGURE 15 ). Central teeth with cusp formula 4–5+1+3–5, basal cusps 2+2; median cusp sharp to blunt, twice to more than twice as long as adjacent cusps. Lateral teeth with cusp formula 2–3+1+3–4; main cusp sharp to blunt, about twice as long as adjacent cusps. Inner marginal teeth with 15–19 cusps. Outer marginal teeth with 17–20 cusps.

Female reproductive system ( Fig. 16D, E View FIGURE 16 ). Ovary simple sac. Renal oviduct with vertical U-shaped arch. Seminal receptacle anterior to bursa or near anterior edge of bursa, oval, duct very short. Bursa copulatrix behind albumen gland, round or elongately-oval or vertically-oval, shorter than albumen gland, bursal duct enters bursa mid anteriorly, bursal duct joins coiled oviduct little behind posterior mantle cavity wall or well behind posterior mantle cavity wall. Albumen gland partly in mantle cavity. Capsule gland with two distinct glandular zones, thin in cross section or medium thickness in cross section, markedly indented by rectum. Anterior vestibule large, opening terminal, intermediate in size, cowl and/or gutter associated with oviduct opening absent.

Male reproductive system ( Fig. 17C View FIGURE 17 , 18D View FIGURE 18 ). Prostate gland mostly in mantle roof or less than half in mantle roof, bean-shaped, medium in cross section. Posterior pallial vas deferens coiled, anteriorly slightly undulating. Penis towards middle of head, well down neck, distal end broad, terminal papilla small.

Etymology. Named for Routh Station.

Distribution and habitat. This species is common in a few springs on Routh Station about 15 km ESE of Georgetown in the middle of the base of Cape York, Queensland and near the western boundary of the Einasleigh Uplands.

Remarks. This species is most similar to the species described below and is compared to it in the Remarks under that species.


Queensland Museum