Aglaophenia howensis Briggs, 1918

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: 2-3

publication ID

https://doi.org/10.5852/ejt.2020.615

publication LSID

lsid:zoobank.org:pub:637FC87F-13B5-4B32-BC52-11A9B30ECF1D

DOI

http://doi.org/10.5281/zenodo.3718323

persistent identifier

http://treatment.plazi.org/id/03B52048-1A5B-FFA1-9555-74F258A18527

treatment provided by

Plazi

scientific name

Aglaophenia howensis Briggs, 1918
status

 

Aglaophenia howensis Briggs, 1918 

Figs 1View Fig A–B, 2

Halicornaria  sp. nov. Whitelegge, 1899a: 41.

Aglaophenia howensis Briggs, 1918: 27  , pl. 5 figs 1–2, pl. 6 fig. 1.

Lytocarpia howensis  – Vervoort & Watson 2003: 311, fig. 75a–d.

Material examined

PACIFIC OCEAN • 3 plumes without hydrorhizae, 5 cm, 10 cm and 10 cm, respectively, the latter bearing gonothecae; off New Caledonia, stn CP4786 ; 22°46ʹ S, 167°42ʹ E; 350–469 m; 29 Aug. 2016; KANACONO leg.; MNHN-IK-2015-544GoogleMaps  .

Remarks

For a thorough description of this species, refer to Briggs (1918). Vervoort & Watson (2003) removed it from Aglaophenia Lamouroux, 1816  and placed it in Lytocarpia Kirchenpauer, 1872  , on the account of peculiarities of its hydrothecae, not taking into account the morphology of its gonosome, otherwise well documented in the original account. The species was then transferred back to Aglaophenia  after the examination of the present material with corbulae, whose structure does not include hydrothecae at the base of the costae ( Fig. 1BView Fig).

As noted by Briggs (1918), a reversal of the orientation of cladia, whose hydrothecae face either the frontal (F) or dorsal (D) aspect of the cormoid, could be noted. In the fertile plume available, this change occurs 12 times, as follows (from proximal to distal end): 15 (F), 10 (D), 7 (F), 12 (D), 19 (F), 10 (D), 8 (F), 13 (D), 34 (F), 26 (D), 29 (F), 32 (D), and 13 (F), the numbers representing the number of consecutive cladia per side of cormoid and per group of orientation. Implicitly, when corbulae are present within a given group, their orientation with respect to the side of the plume changes as well.

Distribution

Scattered records from the Tasman Sea area, up to Norfolk Island in the North ( Vervoort & Watson 2003); New Caledonia (present report).

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

Order

Leptothecata

Family

Aglaopheniidae

Genus

Aglaophenia

Loc

Aglaophenia howensis Briggs, 1918

Galea, Horia R. 2020
2020
Loc

Halicornaria

Whitelegge T. 1899: 41
Loc

Aglaophenia howensis

Briggs E. A. 1918: 27
Loc

Lytocarpia howensis

Vervoort W. & Watson J. E. 2003: 311