Hedgpethia bicornis (Turpaeva, in Losina-Losinsky & Turpaeva, 1958 )

Sabroux, Romain, 2025, The genus Hedgpethia Turpaeva, 1973 (Pycnogonida: Colossendeidae): a review and a new species, European Journal of Taxonomy 1026, pp. 147-170 : 151

Hedgpethia bicornis (Turpaeva, in Losina-Losinsky & Turpaeva, 1958)

Fig. 2, Table 1

Colossendeis bicornis Turpaeva in Losina-Losinsky & Turpaeva, 1958: 27–29, 32 [key], 33 [text], fig. 3, tabs 3–5.

Colossendeis bicornis – Losina-Losinsky 1961: 109–110.

Rhopalorhynchus bicornis – Stock 1970: 9 [key].

Hedgpethia californica – Turpaeva 1973 [partim]: 185 [key], 186–189, tab. 2.

Hedgpethia californica bicornis – Turpaeva 1973: 187–189 [text], tab. 3; 2002: 1451 [text], 1451, 1452. — Dudnik & Kremenetskaia (2025): fig. 6d, tab. 1.

Hedgpethia bicornis – Stock 1991a: 166 [text]. — Turpaeva 1993: 22 [text].

Type material (not examined)

Holotype

SEA OF OKHOTSK • sex unknown; northeastern Sea of Okhotsk ; depth 1100 m; 3 Oct. 1952; R/V Vityaz cruise 12 stn 1780; IORAS, INV0002674 .

Paratypes

SEA OF OKHOTSK • 2 specs; same data as for holotype; hosting institution unknown • 1 spec.; southern Sea of Okhotsk ; 10 Aug 1949; R/V Vityaz; hosting institution unknown • 1 spec.; 1932; R/V Gagara stn 217; hosting institution unknown • 19 specs; 1932; R/V Gagara stn 247; hosting institution unknown • 1 spec.; 1932; R/V Gagara stn 250; hosting institution unknown • 1 spec.; 1932; R/V Gagara stn 261; hosting institution unknown • 2 specs; 1952; R/V Guidrolog; hosting institution unknown .

NORTHWESTERN PACIFIC • 2 specs; south of Southern Kuril Islands ; 1949; R/V Toporok; hosting institution unknown .

Distribution and depth range

Sea of Okhotsk ( type locality) and east to Kuril Islands. Minimal known depth range 303–1100 m.

Remarks

Stock (1991a) suggested this species to be a possible junior synonym to Hedgpethia californica ( Hedgpeth, 1939) , without explicit justification. However, the mediodorsal ornamentation of H. bicornis as well as the low tubercle on the anterior margin of its cephalon distinguish it from H. californica .