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Halopteris peculiaris

Billard, 1913

GBIF:167407433

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Figs 14 N – P, 15 D – E

Galea, Horia R., Maggioni, Davide (2020): Plumularioid hydroids (Cnidaria: Hydrozoa) from off New Caledonia collected during KANACONO and KANADEEP expeditions of the French Tropical Deep-Sea Benthos Program. European Journal of Taxonomy 708: 1-58, DOI: 10.5852/ejt.2020.708

Remarks For synonymy and a description, refer to Schuchert (1997). In the present material, the lateral nematothecae associated to the cauline hydrothecae on the side opposite to the cladial apophyses are often absent (Fig. 14 O); in only rare instances, a pair is formed (Fig. 14 P). The cladia display a regular structure: they begin with a short, quadrangular, athecate segment, followed by an ahydrothecate internode bearing a superior nematotheca and ending distally in an oblique node; afterwards, the segmentation is heteromerous, with up to 8 hydrothecate internode alternating with ahydrothecate counterparts (Fig. 14 N); the latter are short, delimited proximally by a transverse node and distally by an oblique node, and bear a frontal nematotheca; the hydrothecate internodes are slightly longer, are delimited proximally by an oblique node and distally by a transverse one, and bear distally a hydrotheca and its 4 associated nematothecae: a mesial, a pair of laterals, and a scale-shaped axillar one. There is an important sexual dimorphism of the gonothecae: the female, given off from below the cauline hydrothecae, are large, ovoid and bear proximally 3 nematothecae (Fig. 15 D); the male gonothecae, borne on cladia, are comparatively minute, and bear a single basal gonotheca (Fig. 15 E).

Distribution North Ubian Island, Philippines (Billard 1913), Lizard Island, Australia (Schuchert 1997), South Africa [Millard 1975, as Halopteris glutinosa (Lamouroux, 1816)].

Material examined PACIFIC OCEAN • 1 colony composed of a few fertile stems, up to 6 cm high; off New Caledonia, stn DW 4774; 23 ° 01 ′ S, 168 ° 19 ′ E; 100 – 90 m; 28 Aug. 2016; KANACONO leg.; MNHN-IK- 2015 - 609.

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Taxonomic Classification Tree

AnimaliaCnidariaHydrozoaLeptothecataHalopterididaeHalopterisHalopteris peculiaris

Halopteris peculiaris

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Fig. 15. A–B. Halopteris campanula (Busk, 1852), female (A) and male (B) gonothecae from samples MNHN-IK-2015-598 and MNHN-IK-2015-597, respectively. — C. Halopteris infundibulum Vervoort, 1966, possible female gonotheca, from sample MNHN-IK-2015-608. — D–E. Halopteris peculiaris Billard, 1913, female (D) and male (E) gonothecae, both from sample MNHN-IK-2015-609. Scale bar: 300 µm.

Fig. 14 (opposite page). A–D. Corhiza patula Galea sp. nov., from holotype MNHN-IK-2015-602, proximal portion of cladium (A); nematothecae: mesial (B), lateral (C), and from ahydrothecate internode (D). — E–J. Corhiza pauciarmata Ansín Agís et al., 2009, from sample MNHN-IK-2015-604, portion of cladium (E); nematothecae: mesial (F), lateral (G) and from ahydrothecate internode in lateral (H) and adaxial (I) aspects; cnidome (J). — K. Halopteris campanula (Busk, 1852), portion of cladium from sample MNHN-IK-2015-597. — L–M. Halopteris infundibulum Vervoort, 1966, cladial hydrotheca in lateral (L) and frontal (M) aspects, both from sample MNHN-IK-2015-608. — N–P. Halopteris peculiaris Billard, 1913, proximal portion of cladium seen laterally (N); single (O) or paired (P) lateral nematothecae associated to cauline hydrothecae; all from sample MNHN-IK-2015-609. Scale bars: A, E = 500 µm; B–D, F–I, O–P = 100 µm; J = 10 µm; K–N = 300 µm

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Descriptions(4)

Taxonomic Classification Tree

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