Oswaldella Stechow, 1919

Peña 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, pp. 805-861 : 811-812

publication ID

1464-5262

persistent identifier

https://treatment.plazi.org/id/038687FC-FF93-A75A-3AF1-05BEFBE2758E

treatment provided by

Carolina

scientific name

Oswaldella Stechow, 1919
status

 

Oswaldella Stechow, 1919 View in CoL

Oswaldella Stechow, 1919: 853 View in CoL ; type, by original designation: Schizotricha bifurca, Hartlaub, 1904 .

Diagnosis (taken from Peña Cantero et al., 1997). Feather-like, colonial hydroids with branched or unbranched stem, divided into internodes or undivided, mono- or polysiphonic and with two longitudinal rows of apophyses, alternately arranged in one plane and supporting hydrocladia. Apophyses with varied number of nematophores on upper surface near axil with hydrocaulus, emerging through a raised, perforated part of the periderm (‘mamelon’) and / or through simple holes in the perisarc. Stem without nematophores or nematothecae. Hydrocladia typically branched. Degree of branching varied, fourth-order hydrocladia having been recorded. Hydrocladia homomerously divided into internodes (with the exception of Oswaldella herwigi El Beshbeeshy, 1991 ) bearing one hydrotheca and two nematophores each: one mesial superior nematophore and another mesial inferior. First nematophore placed behind free adcauline hydrothecal wall; second situated below hydrotheca at a more or less distinct elevation of internode. Mesial inferior nematophore with or without rudimentary, scale-shaped nematotheca. Hydrothecae cupshaped to tubular. Colonies dioecious, with sexual dimorphism. Gonothecae inserting on hydrocladia below hydrotheca next to mesial inferior nematophore. Cnidome composed of microbasic mastigophores, typically in two size classes.

List of species described in or now referred to Oswaldella

Oswaldella antarctica ( Jäderholm, 1904) View in CoL (= Schizotricha antarctica Jäderholm, 1904 ) Oswaldella bifurca ( Hartlaub, 1904) View in CoL (= Schizotricha bifurca Hartlaub, 1904 ) Oswaldella billardi Briggs, 1938 View in CoL

Oswaldella blanconae El Beshbeeshy, 1991 View in CoL

Oswaldella crassa Peña Cantero and Vervoort, 1998 View in CoL

Oswaldella curiosa Peña Cantero and Vervoort, 1998 View in CoL

Oswaldella delicata Peña Cantero, Svoboda and Vervoort, 1997 View in CoL

Oswaldella elongata Peña Cantero, García Carrascosa and Vervoort, 1995 View in CoL Oswaldella encarnae Peña Cantero, Svoboda and Vervoort, 1997 View in CoL

Oswaldella erratum Peña Cantero and Vervoort, 1997 View in CoL

Oswaldella frigida View in CoL sp. nov.

Oswaldella garciacarrascosai Peña Cantero, Svoboda and Vervoort, 1997 View in CoL Oswaldella gracilis Peña Cantero, Svoboda and Vervoort, 1997 View in CoL

Oswaldella grandis Peña Cantero, Svoboda and Vervoort, 1997 View in CoL

Oswaldella herwigi El Beshbeeshy, 1991 View in CoL

Oswaldella incognita Peña Cantero, Svoboda and Vervoort, 1997 View in CoL

Oswaldella medeae View in CoL sp. nov.

Oswaldella monomammillata sp. nov.

Oswaldella obscura Peña Cantero, Svoboda and Vervoort, 1997 View in CoL

Oswaldella rigida Peña Cantero, Svoboda and Vervoort, 1997 View in CoL

Oswaldella shetlandica View in CoL Stepan’yants, 1979

Oswaldella stepanjantsae El Beshbeeshy, 1991 View in CoL

Oswaldella terranovae Peña Cantero and Vervoort, 1996 View in CoL

Oswaldella tottoni Peña Cantero and Vervoort, 1996 View in CoL

Oswaldella vervoorti Peña Cantero and García Carrascosa, 1998 View in CoL

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

Order

Leptothecata

Family

Kirchenpaueriidae

Loc

Oswaldella Stechow, 1919

Peña Cantero, A. L. & Vervoort, W. 2004
2004
Loc

Oswaldella

STECHOW, E. 1919: 853
1919
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