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Corhiza pauciarmata

Corhiza pauciarmata

Ansin Agis, 2009

GBIF:167407441

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Descriptions(5)

Description Colonies upright, up to 9 cm high, with strongly fascicled stems, ca 4 mm thick basally, most probably arising from rhizoid stolons. Cladia numerous, up to 1.2 cm long, given off irregularly from component tubes of stem; transverse constriction short distance above origin; proximal part ahydrothecate, with few occasional transverse nodes or signs of breakage and subsequent regeneration, with row of frontal nematothecae, distally ending in oblique node; remainder of stem heteromerously segmented, with alternating thecate and ahydrothecate internodes, both short. Thecate internodes, up to 12 per cladium, barely accommodating a hydrotheca and its 3 associated nematothecae: a mesial one and pair of laterals; mesial nematotheca immovable, with rim of upper chamber lowered adaxially; lateral nematothecae borne on short apophyses, with globular upper chamber whose abaxial wall is deeply scooped, adopting marked sinusoid shape adaxially. Athecate internodes with two frontal nematothecae in row; upper chamber with rim distinctly emarginated on adaxial side, often sinusoid. Gonothecae absent. Cnidome composed of three types of heteronemes: 1) seed-shaped, (4.8 – 5.1) × (3.1 – 3.3) µm; 2) banana-shaped, (6.4 – 6.6) × (2.5 – 2.6) µm; 3) elongated-ovoid, (20.9 – 23.1) × (4.6 – 5.1) µm.
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
Figs 11 D, 14 E – J; Table 7
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 Although the ahydrothecate internodes of cladia are comparatively shorter, no other differences could be noted with the specimens described and illustrated by Ansín Agís et al. (2009).
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
Distribution Scattered records from off New Caledonia (Ansín Agís et al. 2009; present study).
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
Material examined PACIFIC OCEAN • 2 sterile colonies, 6 and 9 cm high, respectively, with only remains of hydrorhiza; off New Caledonia, stn DW 4741; 22 ° 52 ′ S, 167 ° 41 ′ E; 210 – 210 m; 23 Aug. 2016; KANACONO leg.; barcode identifier MT 655153; MNHN-IK- 2015 - 604.
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

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CLASSIFICATION

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AnimaliaCnidariaHydrozoaLeptothecataHalopterididaeCorhizaCorhiza pauciarmata

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Media Files(2)

Fig. 11. A. Antennella aff. varians (Billard, 1911), colony, MNHN-IK-2015-603. — B. Corhiza megatheca (Ansín Agís et al., 2009), colony, MNHN-IK-2015-600. — C. Corhiza patula Galea sp. nov., holotype colony, MNHN-IK-2015-602. — D. Corhiza pauciarmata Ansín Agís et al., 2009, colony, MNHN-IK-2015-604. Scale bars: 1 cm.

Imageimage/png© Galea, Horia R.;Maggioni, DavideGalea, Horia R.;Maggioni, Davide

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

Imageimage/png© Galea, Horia R.;Maggioni, DavideGalea, Horia R.;Maggioni, Davide

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Plumularioid hydroids (Cnidaria: Hydrozoa) from off New Caledonia collected during KANACONO and KANADEEP expeditions of the French Tropical Deep-Sea Benthos Program

checklist

This dataset contains the digitized treatments in Plazi based on the original journal article 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

Abstract. This study reports on 25 species of hydroids occurring in the collections gathered during KANACONO and KANADEEP expeditions carried out in the SE of New Caledonia in 2016, and off the western coast of the island in 2017, respectively. Of these, 19 have not been dealt with in earlier reports on these collections. Two new genera and four new species are described, viz, Actinopluma mirifica Galea gen. et sp. nov., provisionally assigned to the family Kirchenpaueriidae Stechow, 1921, Schizoplumularia helicoidalis sp. nov., belonging to the Plumulariidae McCrady, 1859, and Corhiza patula Galea sp. nov. and Thamnopteros uniserius Galea gen. et sp. nov., both placed in the family Halopterididae Millard, 1962. The gonotheca and the medusoid gonophore of Plumularia contraria Ansín Agís et al., 2014 are described for the first time, allowing a genus transfer to Dentitheca Stechow, 1919, as D. contraria comb. nov. Plumularia conjuncta Billard, 1913, known earlier from a minute portion of colony, is redescribed based on a complete, though infertile, specimen. Similarly, complete specimens corresponding to the hydroid previously referred to as Antennella megatheca Ansín Agís et al., 2009 are documented, allowing a provisional reallocation to Corhiza Millard, 1962 and a description of its so far unknown gonothecae. Fertile material assignable to the poorly-known Monostaechas fisheri Nutting, 1905 allows the recognition of this hydroid as a valid species, distinct from M. quadridens (McCrady, 1859). Most taxa are illustrated to validate the reliability of their identifications. Finally, phylogenetic reconstructions of the families Aglaopheniidae, Plumulariidae, and Halopterididae, based on the 16S rRNA, allowed a first genetic characterization of some of the species dealt with in this work.

Galea H R, Maggioni D, valdenar (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. Checklist dataset https://doi.org/10.5852/ejt.2020.708 accessed via GBIF.org on 2026-06-17.

CC0Published 8/26/2020View dataset
GBIF Usage Key
167407441
Dataset Key
0c523d70-0815-45f8-a69d-1698f78a0998
Origin
source
Backbone Key
6180858
Taxon ID
03D92045FFA9FFD6E61C21DDC4E8F81C.taxon
Last Crawled
6/10/2026
Last Interpreted
6/10/2026
View on GBIFSource Reference