Lytocarpia cf. spiralis ( Totton, 1930 )

Galea, Horia R., 2020, Aglaopheniid hydroids (Cnidaria: Hydrozoa: Aglaopheniidae) from off New Caledonia collected during KANACONO and KANADEEP expeditions of the French Tropical Deep-Sea Benthos Program, European Journal of Taxonomy 615, pp. 1-47 : 33

Lytocarpia cf. spiralis ( Totton, 1930)

Figs 16A , 17 A–B

Thecocarpus spiralis Totton, 1930: 238 , fig. 69c–d.

Thecocarpus spiralis – Ralph 1961: 59, figs 8i–j, 10d. Lytocarpia spiralis – Vervoort & Watson 2003: 321, figs 77d–h, 78a–e.

Material examined

PACIFIC OCEAN • 1 colony, ca 46 cm high, bearing 11 plumose side branches, without gonothecae, hydrothecae with mostly damaged rims; off New Caledonia, stn DW5038 ; 19°55ʹ S, 158°35ʹ E; 340 m; 22 Sep. 2017; KANADEEP leg.; MNHN-IK-2015-546 .

Remarks

The present material agrees well with descriptions of Lytocarpia spiralis ( Totton, 1930) by Ralph (1961) and Vervoort & Watson (2003) but, since it is devoid of its gonosome and the condition of the hydrothecal rim could not be assessed properly, it is assigned with a query to it.

Distribution

Previously known from waters around New Zealand ( Vervoort & Watson 2003); New Caledonia (present study).

Figures

Fig. 16. A. Lytocarpia cf. spiralis (Totton, 1930), colony from sample MNHN-IK-2015-546. — B. Lytocarpia subtilis sp. nov., colony and corbula (insert) from sample MNHN-IK-2015-525 (holotype). — C–D. Macrorhynchia phoenicea (Busk, 1852) (C), from sample MNHN-IK-2015-512, compared to M. disjuncta (Pictet, 1893) (D), from sample MNHN-IK-2015-513. — E–G. Macrorhynchia spiralis sp. nov., colonies from samples MNHN-IK-2015-519 (E, holotype) and MNHN-IK-2015-520 (F, one paratype), and medusoid gonophore (G) from former sample. Scale bars: A = 3 cm; B–F = 1 cm; B (insert) = 1 mm; G = 100 µm.

Fig. 17. A–B. Lytocarpia cf. spiralis (Totton, 1930), portion of stem (A) and hydrotheca (B), from sample MNHN-IK-2015-546. — C–J. Lytocarpia subtilis sp. nov. C. Portion of stem. D–I. Lateral view of a hydrotheca (D), with details of its basal (E) and distal (F) parts; hydrotheca seen apically (G), and variation in the shape of its margin seen frontally (H) and laterally (I). J. Portion of corbula rachis with costa and gonotheca. From samples MNHN-IK-2015-525 (C, E–G) and MNHN-IK-2015-526 (D, H–J). Scale bars: A = 300 µm; B, D–F, J = 200 µm; C = 1 mm; G–I = 100 µm.