Oswaldella garciacarrascosai Peña Cantero, Svoboda & Vervoort, 1997

Molinero, A. González & Peña Cantero, A. L., 2015, SEM study of species of Oswaldella Stechow, 1919 (Cnidaria, Hydrozoa, Kirchenpaueriidae), with an annotated checklist of the species of the genus, Zootaxa 4052 (4), pp. 401-441 : 409

publication ID

https://doi.org/ 10.11646/zootaxa.4052.4.1

publication LSID

lsid:zoobank.org:pub:47EF6E9D-9064-4899-B3DD-276FF7C969EB

DOI

https://doi.org/10.5281/zenodo.6107455

persistent identifier

https://treatment.plazi.org/id/03C287C6-2803-7C1E-D4F4-8F2B2F7F7FEF

treatment provided by

Plazi

scientific name

Oswaldella garciacarrascosai Peña Cantero, Svoboda & Vervoort, 1997
status

 

Oswaldella garciacarrascosai Peña Cantero, Svoboda & Vervoort, 1997 View in CoL

( Figs 6 View FIGURE 6 , 16 View FIGURE 16 F, 17F, 19F)

Material examined. New Zealand Antarctic Expedition TAN0802: Stn 180, Tangaroa , 29 February 2008, 69.4318°S, 178.8195°W (off Cape Adare, Ross Sea,), 447–455 m ( NIWA 37896).

Description. Monosiphonic, unbranched stems, up to 70 mm high, divided into internodes. Angle between cauline apophyses and stem ca. 45°. Cauline apophyses with three nematophores, two axillary ones ( Fig. 6 View FIGURE 6 B), each emerging through simple hole in perisarc, and a third nematophore emerging through ‘mamelon’ ( Fig. 6 View FIGURE 6 A–B).

Hydrocladia unbranched ( Fig. 6 View FIGURE 6 A) or bifurcated. Mesial-inferior nematophore emerging from strongly marked swelling at proximal third of internode ( Fig. 6 View FIGURE 6 D); without nematotheca ( Fig. 6 View FIGURE 6 C–D). Hydrotheca placed on middle of internode ( Fig. 6 View FIGURE 6 A, C–D). Hydrotheca elongate. Adcauline wall mostly adnate, but with a distinct free portion ( Fig. 6 View FIGURE 6 D). Abcauline wall almost straight, but slightly convex basally and typically with slight concavity just under hydrothecal rim ( Fig. 6 View FIGURE 6 C–D). Hydrothecal aperture circular, perpendicular to long axis of internode, rim even ( Fig. 6 View FIGURE 6 C–D).

Gonothecae fusiform. Male gonotheca with circular, subterminal aperture. Female gonotheca with wide, circular, distal opening ( Fig. 6 View FIGURE 6 E).

Remarks. Until now only mature male gonothecae and immature female ones were known (cf. Peña Cantero et al. 1997); we have found mature female gonothecae ( Fig. 6 View FIGURE 6 E).

NIWA

National Institute of Water and Atmospheric Research

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