Tanystylum duospinum Hilton, 1939

Sabroux, Romain, Hassanin, Alexandre & Corbari, Laure, 2022, Sea spiders (Arthropoda: Pycnogonida) collected during the Madibenthos Expedition from Martinique shallow waters, European Journal of Taxonomy 851 (1), pp. 1-141 : 28-29

Tanystylum duospinum Hilton, 1939

Tanystylum duospinum Hilton, 1939: 33 .

Tanystylum oculospinosum Hilton, 1942b: 70 .

Tanystylum tubirostre Stock, 1954a: 117–120 , figs 24–25.

Tanystylum mexicanum Child, 1979: 32–34 , fig. 11a–h.

Tanystylum oculospinum — Stock 1954a: 122; 1955: 248–249; 1966b: 390.

Tanystylum oculospinosum – Child & Hedgpeth 1971: 619 (list). — Child 1979: 34; 1992a: 2–3, 23–24; 1992b: 8 (keys), 35–37, tab. 3, fig. 16; 2009: 819 (list). — Stock 1994: 18, 38.

Tanystylum tubirostrum – Stock 1975a: 984.

Tanystylum tubirostrum – Stock 1986: tab. 1. — Child 1979: 34–35; 1982a: 363. — Müller 1990d: 67–68, figs 16–20.

Tanystylum duospinum – Russel & Hedgpeth 1990: 215–224, figs 1–2 (biology). — Sun 2009: 13, 22–27, 33 (key), 34, 36, 40–41, tabs 4, 8, 11, fig. 6, pic. 4. — Tirado-Sanchez 2014: 3. — Sabroux et al. 2019b: tab. 1, fig. 3. — Wang et al. 2020: tab. 1. — León-Espinosa et al. 2021: 168, tab. 1. — Ramírez-Tello et al. 2022: 154, tab. 1.

Type material

Tanystylum duospinum Hilton, 1939 . Holotype: USNM 81531 (not examined). Type locality: Baja California, Pacific Mexico.

Tanystylum oculospinum Hilton, 1942 . Holotype: USNM 81518 (not examined). Type locality: Todos Santos Bay, Baja California, Pacific Mexico.

Tanystylum tubirostre Stock, 1954 . Holotype: NL ZMA.PYC.P.1520 (not examined). Type locality: Punt Vierkant , Bonaire.

Tanystylum mexicanum Child, 1979 . USNM 170650 (not examined). Type locality: Gulf of California, Pacific Mexico.

Material examined

MARTINIQUE • 1 ♀ gr.; Le Robert ; 14°41.1ʹ N, 60°51.4ʹ W; depth 10 m; 19 Sep. 2016; st. AB195; MNHN-IU-2016-578/ MK411118 • 1 juv.; Le Robert ; 14°43.2ʹ N, 60°50.6ʹ W;depth 23 m; 25 Sep. 2016; st. AB405; MNHN-IU-2016-1049/ MK411036 • 1 ♀; E of Le Robert ; 14°40.1ʹ N, 60°51.1ʹ W; depth 0–16 m; 18 Sep. 2016; st. AS 255; MNHN-IU-2016-1177/ MK411071 .

Remarks

We follow the suggestion of Bamber et al. (2022) in considering T. oculospinosum , T. tubirostrum and T. mexicanum as junior synonyms of T. duospinum . This is the first record of this species in Martinique. All records in the present material are from Atlantic coast off Le Robert.

Distribution

Circumtropical, mostly recorded in America with records in the East Pacific (California, Mexico, Panama, Galápagos, Ecuador, Peru), and West Atlantic ( Bermuda, Gulf of Mexico, Caribbean). Other records from Kenya, Taiwan, Indonesia and Australia (Carpentaria Gulf). It is worth noting that the distribution range nominatively for T. duospinum is restricted to the East Pacific American coast, and that the widest distribution for the species has been recorded under the synonym T. oculospinosum (American Pacific coast from Mexico to Galápagos and Peru, and Australia). Tanystylum tubirostrum was nominatively recorded from Atlantic and Pacific American tropical waters, while T. mexicanum was nominatively recorded only from the Pacific Mexico.

Depth range

Intertidal to 54 m.