Antennella secundaria ( Gmelin, 1791 )

Peña Cantero, Álvaro L. & Horton, Tammy, 2017, Benthic hydroids (Cnidaria, Hydrozoa) from bathyal and abyssal depths of the Northeast Atlantic held in the modern Discovery Collections, Zootaxa 4347 (1), pp. 1-30 : 20-23

publication ID	https://doi.org/10.11646/zootaxa.4347.1.1
publication LSID	lsid:zoobank.org:pub:176D72B0-0DD6-4D51-83CA-D47C2268A3CF
DOI	https://doi.org/10.5281/zenodo.5248594
persistent identifier	https://treatment.plazi.org/id/03F0943B-FFCF-4D02-0BF8-F8B3FBAD117E
treatment provided by	Plazi (2017-11-10 05:49:34, last updated 2024-11-26 22:11:53)
scientific name	Antennella secundaria ( Gmelin, 1791 )
status

Treatment

Antennella secundaria ( Gmelin, 1791) View in CoL

( Fig. 9A–E View FIGURE 9 )

Antennella secundaria View in CoL — Ansín Agís et al., 2001: 140 –145, fig. 63 (synonymy).

Material examined. 13881#1, five stems up to 10 mm high, on Sertularella gayi , no gonothecae.

Description. Stems unbranched, up to 10 mm high, and with up to six hydrothecae. Stem resting on short apophysis. First two cauline internodes with two nematothecae, third internode longer and provided with six nematothecae ( Fig. 9A View FIGURE 9 ). Remaining stem divided by alternating oblique and transverse nodes into an alternate series of hydrothecate/ahydrothecate internodes ( Fig. 9B–D View FIGURE 9 ). Ahydrothecate internodes typically with three medial nematothecae ( Fig. 9C View FIGURE 9 ), although internodes with only one also present ( Fig. 9B View FIGURE 9 ). Hydrothecate internodes with one hydrotheca and four nematothecae: two flanking hydrothecal aperture on long pedicels ( Fig. 9E View FIGURE 9 ) (frequently one without pedicel), one nematotheca at axil between adcauline hydrothecal wall and internode ( Fig. 9D View FIGURE 9 ) and a mesial infrathecal nematotheca not reaching hydrothecal basal part ( Fig. 9B–D View FIGURE 9 ). All nematothecae bi-chambered. Hydrotheca cup-shaped ( Fig. 9E View FIGURE 9 ). Hydrothecal wall roughly straight in lateral view, but distinctly widening at distal part of adcauline side. Hydrothecal aperture circular; rim laterally concave ( Fig. 9E View FIGURE 9 ).

Remarks. See Calder (1997b), Schuchert (1997) or Ansín Agís et al. (2001) for a wide discussion on the species.

Ecology and distribution. This is a eurybathic species, known between 0 ( Millard 1975) and 2700 m (Vervoort 2006); present material collected from the Porcupine Seabight at a depth of 863 m. Worldwide distribution in temperate, subtropical and tropical seas (Vervoort 2006).

References

Ansin Agis, J., Ramil, F. & Vervoort, W. (2001) Atlantic Leptolida (Hydrozoa, Cnidaria) of the families Aglaopheniidae, Halopterididae, Kirchenpaueriidae and Plumulariidae collected during the CANCAP and Mauritania-II expeditions of the National Museum of Natural History, Leiden, The Netherlands. Zoologische Verhandelingen, Leiden, 333, 3 - 268.

Calder, D. R. (1997 b) Shallow-water hydroids of Bermuda: Superfamily Plumularioidea. Life Science Contributions. Royal Ontario Musseum, 161, 1 - 86.

Gmelin, J. F. (1791) Caroli a Linne, systema naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Editio decima tertia, aucta reformata. Tomus I, Pars 6. G. E. Beer, Lipsiae, 1100 pp. [pp. 3021 - 4120]

Millard, N. A. H. (1975) Monograph on the Hydroida of southern Africa. Annals of the South African Museum, 68, 1 - 513.

Schuchert, P. (1997) Review of the family Halopterididae (Hydrozoa, Cnidaria). Zoologische Verhandelingen, Leiden, 309, 1 - 162.

Figures

FIGURE 9. Antennella secundaria (Gmelin, 1791): A, third stem internode with nematothecae; B, ahydrothecate internode with one nematotheca; C, ahydrothecate internode with three nematothecae; D, lateral view of hydrothecate internode showing hydrotheca and mesial superior nematotheca (arrow); E, lateral view of hydrothecate internode showing hydrotheca and lateral nematothecae (arrow). Nemertesia ramosa (Lamarck, 1816): cauline apophysis showing nematothecae and mamelon (arrow); G, fragment of hydrocladium showing arrangement; H, hydrocladial internode with hydrotheca and nematothecae. Scale bars: 200 µm (A – C, F – G), 100 µm (D – E, H).