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Styraconyx kristenseni Renaud-Mornant 1981

Comprehensive Description

provided by Smithsonian Contributions to Zoology
Styraconyx kristenseni Renaud-Mornant, 1981

Styraconyx kristenseni Renaud-Mornant, 1981b:804–807, fig. 2, table 1 [type-locality: Moorea, Polynesia].—Kristensen and Renaud-Mornant, 1983:338.

Styraconyx kristenseni kristenseni Renaud-Mornant, 1981b:804–807, fig. 2, table 1 [type-locality: Moorea, Polynesia].

Styraconyx kristenseni neocaledoniensis Renaud-Mornant, 1981b:807, 808 [type-locality: Baie Saint-Vincent, New Caledonia].

Styraconyx sargassi.—Renaud-Mornant, 1967:111, fig. 3 [Baie Saint Vincent, New Caledonia]; 1971:960; 1976:291.—Pollock, 1976:15 [illustrated key]; 1979a:153. [Not S. sargassi Thulin, 1942.]

Styraconyx sargassi(?).—Renaud-Mornant, 1982a:156, 169, fig. 7c [Reao and Moorea, Polynesia].

Bathyechiniscus tetronyx.—Pollock, 1983:111 [in part].

MATERIAL EXAMINED.—Type Material: Holotype, female (MNHN, Paris, AH595), paratypes, 2 females (MNHN, Paris, AH590a, AH610), I juvenile (MNHN, Paris, AH597), sediment collected by B. Salvat, coralline sand, 1–2 m, Moorea, Polynesia; specimens extracted and determined by J. Renaud-Mornant; specimens seen but not studied intensively by senior author.

Other Material: 4 females, 1 male, 1 juvenile (R.M. Kristensen HU 082881.3–5), col. H. Ramløv, 28 Aug 1981, 0.5 m depth, from coralline sand, Ahiaa, Al-Ghardaqa, Egypt.

One female (R.M. Kristensen AU 103079.1), col. N. Svennevig, 30 Oct 1979, from coralline sand, 2 m depth, Lagoon, One Tree Island, Australia.

One female (R.M.K., AU 042579.1), col. N. Svennevig, 25 Apr 1979, from coralline sand, ∼2 m depth, Main Island, Willis Group, Coral Sea.

One juvenile (R.M.K., AU 042679.1), col. N. Svennevig, 26 Apr 1979, from coralline sand, approximately 2 m depth, North Cay, Magdelaine Reef, Coral Sea.

Two females, 6 adults of undetermined sex, 1 two-clawed larva (R.M.K., AU 051279.1–9), col. N. Svennevig, 12 May 1979, from coralline sand, 2 m depth, Cay Sea, Marion Reef, Coral Sea.

One female (R.M.K., AU 050879.1), col. N. Svennevig, 8 May 1979, from intertidal coralline residue, Bennett Island, Chesterfield Reefs, Coral Sea.

Two females (R.M.K., AU 051079.1, 2), col. N. Svennevig, 10 May 1979, from coralline sand-gravel, 2 m depth, Cay North, Long Island, Chesterfield Reefs, Coral Sea.

One juvenile (R.M.K., NZ 011980.1), col. N. Svennevig, 19 Jan 1980, from coralline residue, Leigh, New Zealand.

EMENDED DIAGNOSIS.—Styraconyx with nearly terminal mouth opening. Pigmented “eyespots” present in some. Primary clavae short, asymmetrical, inserted together with lateral cirri on pedestals (Figure 47A). Cephalic cirri with scapus and flagellum. Outer contour of secondary clavae not visible. Peduncles (Figure 47D) present only on external digits (Figure 47B). Internal digits with distinct proximal pads. Seminal receptacles with nearly straight ducts. Large folds of cuticle near legs, dorsal cuticle with irregular ridges. Three-pointed claws (Figure 47E) crescent-shaped with posterior point of claw curving outward. Claw sheath covering claw hooks.
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bibliographic citation
Kristensen, R. M. and Higgins, Robert P. 1984. "Revision of Styraconyx (Tardigrada: Halechiniscidae) with descriptions of two new species from Disko Bay, West Greenland." Smithsonian Contributions to Zoology. 1-40. https://doi.org/10.5479/si.00810282.391