Oswaldella delicata Pena Cantero, Svoboda & Vervoort 1997
Creators
Description
Oswaldella delicata Peña Cantero, Svoboda & Vervoort, 1997
(Figs 2, 16 B, 17B, 19B)
Material examined. Spanish Antarctic Expedition Bentart 95: Stn 28A, BIO Hespérides, 2 February 1995, 62°12.1297’S, 60°23.1833’W (South Shetland Islands, north of Livingston Island), 126 m (Department of Zoology, University of Valencia, BENTART 95-28A).
Description. Monosiphonic, unbranched stems, up to 60 mm high, divided into internodes. Angle between cauline apophyses and stem ca. 45°. Cauline apophyses with single axillary nematophore, emerging through perisarc hole provided with very short collar-shaped nematotheca (Fig. 2 B, C).
Hydrocladia unbranched (Fig. 2 A), some bifurcated. First hydrocladial internode bifurcated, with two similar prongs. Mesial superior nematophore emerging behind free part of adcauline hydrothecal wall. Mesial inferior nematophore on a strongly marked swelling at proximal third of internode; with well-developed, nail-shaped nematotheca (Fig. 2 D–F). Hydrotheca elongate, placed on middle of internode. Adcauline wall with distinct free portion. Abcauline hydrothecal wall roughly straight, but basally convex (Fig. 2 E). Hydrothecal aperture circular, more or less perpendicular to long axis of internode (Fig. 2 D–E); rim even.
Gonothecae fusiform with subterminal circular aperture.
Remarks. Our study has confirmed the presence of a single axillary nematophore in the cauline apophyses, as previously described (Peña Cantero et al. 1997; Peña Cantero & Vervoort 2004). However, it is noteworthy that our study has provided evidence of the presence of a little-developed, previously unnoticed, collar-shaped nematotheca associated with that nematophore (Fig. 2 B–C).
Notes
Files
Files
(2.2 kB)
Name | Size | Download all |
---|---|---|
md5:78f1f9a6a60c84e19a0a6ead413bc3bf
|
2.2 kB | Download |
System files
(16.3 kB)
Name | Size | Download all |
---|---|---|
md5:6543954f6f9b9b100d139c11592cb223
|
16.3 kB | Download |
Linked records
Additional details
Identifiers
Biodiversity
- Family
- Kirchenpaueriidae
- Genus
- Oswaldella
- Kingdom
- Animalia
- Order
- Leptothecata
- Phylum
- Cnidaria
- Scientific name authorship
- Pena Cantero, Svoboda & Vervoort
- Species
- delicata
- Taxon rank
- species
- Taxonomic concept label
- Oswaldella delicata Cantero, 1997 sec. Molinero & Cantero, 2015
References
- Pena Cantero, A. L., Svoboda, A. & Vervoort, W. (1997) Species of Oswaldella Stechow, 1919 (Cnidaria, Hydrozoa) from recent antarctic expeditions with R. V. ' Polarstern', with the description of eight new species. Zoological Journal of the Linnean Society, 119, 339 - 388. http: // dx. doi. org / 10.1111 / j. 1096 - 3642.1997. tb 00140. x
- Pena Cantero, A. L. & Vervoort, W. (2004) Species of Oswaldella Stechow, 1919 (Cnidaria: Hydrozoa: Kirchenpaueriidae) from US Antarctic expeditions, with the description of three new species. Journal of Natural History, 38, 805 - 861. http: // dx. doi. org / 10.1080 / 0022293021000045154