Salinator tecta, Golding, Rosemary E., Ponder, Winston F. & Byrne, Maria, 2007

Golding, Rosemary E., Ponder, Winston F. & Byrne, Maria, 2007, Taxonomy and anatomy of Amphiboloidea (Gastropoda: Heterobranchia: Archaeopulmonata), Zootaxa 1476, pp. 1-50: 11-12

publication ID

http://doi.org/ 10.5281/zenodo.176773

publication LSID

lsid:zoobank.org:pub:7AFBBEF1-6BF6-400C-A723-B01ACEB61246

persistent identifier

http://treatment.plazi.org/id/03F887BA-990A-543E-118F-C091FEF7F818

treatment provided by

Plazi

scientific name

Salinator tecta
status

sp. nov.

Salinator tecta  sp. nov.

Holotype ( Fig. 2View FIGURE 2 E): Australia, New South Wales: South side of Narrabeen Lakes, near stormwater outlet, in shallow permanent pool with Zostera  , 27 Sep 2004, R.E. Golding (AMS C. 446774).

Paratypes: Same data as holotype (AMS C. 440301), 15 specimens.

Other material examined: Australia, Queensland: Moreton Bay, Serpentine Creek, 10 Aug 1972, saltmarsh zone, QLD Museum party (AMS C. 446512). Australia, New South Wales: Botany Bay, Banksmeadow, sandy tidal mudflat with small mangroves, Apr –Sep 2004, R.E. Golding and M. Hill (AMS C. 440302, C. 440303, C. 442217); Lake Illawarra, Kully Bay, creek near lake with sparse saltmarsh vegetation, 3 May 2004, R.E. Golding and P.M. Golding (AMS C. 440306); North side of Terrigal Lagoon, on mud amongst dense reeds at high tide level, 10 Mar 2004, R.E. Golding, W.F. Ponder and H. Fukuda (AMS C. 442216); South side of Narrabeen Lakes, near stormwater outlet, in shallow permanent pool with Zostera  , 4 Apr 2004, R.E. Golding and M. Hill (AMS C. 442220). Australia, Victoria: Lakes Entrance, Kalimna, saltmarsh, 11 Jan 1970, W.F. Ponder (AMS C. 446513). Australia, South Australia: Coorong, Robs Point, 22 Sep 1982, M. Geddes (AMS C. 446514). Australia, Tasmania: North of Bicheno, coastal saltmarsh lagoon, date unknown, B. Jenkins and V. Morrissey (AMS C. 446515).

Etymology: Tectum (Latin—hidden, sheltered, disguised) is a reference to the cryptic nature of this species’ identity.

Description: Shell ( Fig. 2View FIGURE 2 E): Globose, spire short, diameter to 11 mm, moderately thin, smaller shells semi-transparent when empty. Last whorl lacking shoulder; sinus flattened, indented. Exterior grey to fawn, with raised striae and dusty appearance in adults. Unbanded or with up to three spiral brown bands present at level of sinus.

Operculum: Entirely corneous, pale yellow, elliptical, with eccentric nucleus and paucispiral striae. Inner surface of operculum lacking elaborations around nucleus.

External morphology ( Fig. 6View FIGURE 6 A): As for S. fragilis  , with following differences: Head cream or pale yellow in fresh and formalin-preserved specimens, with distinctive triangular patch of lateral pigmented stripes on anterior central snout and mottled black pigment covering head and foot. Mantle either solid black or with spots of black pigment.

Mantle organs: Mantle cavity roof with few blood vessels; opposed ciliary tracts run entire length of roof and floor of mantle cavity. Hypobranchial gland at right anterior roof of mantle cavity pale yellow in fresh and formalin-preserved specimens, flat, oval.

Digestive system ( Figs. 8View FIGURE 8 A, B): As for A. crenata  , but proportionally smaller.

Radula ( Figs. 9View FIGURE 9 C, D): Each row with central tooth, pair of inner and outer lateral teeth and, on each side, approximately 25 marginal teeth. Central tooth with 13 cusps, mesocone enlarged, adjacent cusps reduced, other cusps reducing in length towards outer edges of tooth; inner lateral teeth narrow, bicuspid; outer lateral teeth with five cusps, second innermost cusp slightly reduced; marginal teeth unicuspid, narrow, elongate, slightly curved.

Central nervous system: As for S. fragilis  , but presence of parapedal and subcerebral commissures not confirmed.

Reproductive system ( Figs. 13View FIGURE 13 B, 14 B, 17 C, D): Proximal reproductive system as for S. fragilis  , distal reproductive structures differ as follows: Spermovipositor short, aperture with ‘lily shaped’ plate, flared and pointed towards genital aperture, edge of spermovipositor aperture microsculpture of small, conical projections. Spermovipositor sheath large, thick, highly folded, orange in fresh specimens, pocket beneath central part of base of spermovipositor and two eversible pockets with highly folded interiors proximally on either side of spermovipositor and adjacent to junction with prostatic gland. Some black pigmentation on lateral surfaces of spermovipositor sheath. Possible spermatophore observed in some specimens, white, globular, contains sperm and prostatic fluid. Egg mass deposited on substrate as a semi-circulate string, circular in crosssection.

Distribution and habitat ( Fig. 1View FIGURE 1): Eastern and southern Australian coast, from Adelaide to Brisbane, also northern Tasmania. Found in mangroves and on mudflats, usually associated with permanent pools of water, often found where fresh water mixes with estuarine ( Woolacott 1945, as S. fragilis  ).

Remarks: Salinator tecta  sp. nov. is separated from S. fragilis  primarily by the distinctive mottled pigmentation on the head and the structure of the spermovipositor, which lacks the prominent projection found in S. fragilis  .