Salinator rosacea, 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: 14

publication ID 10.5281/zenodo.176773

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scientific name

Salinator rosacea

sp. nov.

Salinator rosacea  sp. nov.

Holotype ( Fig. 2View FIGURE 2 G): Australia, Northern Territory: Darwin, Elizabeth River, on mud between mangroves, 20 Mar 2005, H. Fukuda, W.F. Ponder and V. Kessner (AMS C. 446520).

Paratypes: Same data as holotype (AMS C. 446519), 22 specimens.

Other material examined: Australia, Northern Territory: Darwin, Rapid Creek, on mud in mangroves, 15 Jul 1988, W.F. Ponder (AMS C. 445408); Darwin, East Point, Ludmilla Creek, in mangroves, 14 Jun 1976, W.F. Ponder (AMS C. 445412). Australia, Western Australia: Wyndham, mangroves south of Wyndham jetty, 7 May 1978, J. Walker and D. Stoddart (AMS C. 445409, C. 445410); Derby, in mangroves around wharf, 9 Jul 1988, W.F. Ponder (AMS C. 445411).

Etymology: This species is named after its red foot and pink shell.

Description: Shell ( Fig. 2View FIGURE 2 G): Thin and delicate, with very short spire, diameter to 5 mm, Whorls with square shoulder. Exterior uniform pale pink to mauve.

Operculum ( Fig. 4View FIGURE 4 D): Entirely corneous, pale yellow, with eccentric, paucispiral nucleus. Inner surface of operculum with slightly raised bar across nucleus.

External morphology: Head and foot bright red in living and freshly killed specimens, colourless in formalin-preserved specimens.

Mantle organs: Mantle roof with few blood vessels; opposed ciliary tracts short, restricted to exhalant canal; hypobranchial gland flat, yellow in formalin-preserved specimens, circular, positioned at right anterior roof of mantle cavity.

Digestive system: As for A. crenata  , but proportionally smaller.

Radula ( Figs. 9View FIGURE 9 G, H): With central tooth present, lateral teeth absent, approximately 25 marginal teeth on each side of radula; central tooth bearing nine pointed cusps, cusps adjacent to mesocone reduced in length, other cusps narrow and elongate; marginal teeth unicuspid, narrow, elongate, curved.

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

Reproductive system ( Fig. 14View FIGURE 14 D): Proximal reproductive system as for S. fragilis  , with following differences in terminal genitalia: Spermovipositor with flared plate around aperture of spermoviduct bearing three stubby, rounded projections, two from distal portion and one from base of spermovipositor; small, coneshaped microsculpture around aperture of spermovipositor. Spermovipositor sheath highly folded and thickwalled, with a single small pocket distal to junction with spermovipositor base. Egg mass unknown.

Distribution and habitat ( Fig. 1View FIGURE 1): North Western Australia, from Derby (Western Australia) to Darwin (Northern Territory). Found in mangrove habitat.

Remarks: Salinator rosacea  sp. nov. is distinct from other Salinator  species in having red pigmentation of the head-foot, a pink shell with square shoulder, no lateral radular teeth, a spermovipositor bearing three projections and short opposed ciliary tracts in the mantle cavity. This species has been tentatively placed in the genus Salinator  , but may well, with further study, be found to merit recognition at the genus-group level.