Oswaldella Stechow, 1919
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 |
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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
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Oswaldella Stechow, 1919
Peña Cantero, A. L. & Vervoort, W. 2004 |
Oswaldella
STECHOW, E. 1919: 853 |