Taxonomic revision and systematic notes on some Halecium species (Cnidaria, Hydrozoa
Although the genus Halecium is easy to recognize, identifications at the species level are often difficult, this even for quite common and supposedly well-known species of the north-eastern Atlantic. This paper revises and re-describes some Halecium species which resemble each other closely and whic...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.553.2886 2023-05-15T16:11:17+02:00 Taxonomic revision and systematic notes on some Halecium species (Cnidaria, Hydrozoa Peter Schuchert The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.553.2886 http://www.ville-ge.ch/mhng/hydrozoa/pdf/schuchert2005a.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.553.2886 http://www.ville-ge.ch/mhng/hydrozoa/pdf/schuchert2005a.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.ville-ge.ch/mhng/hydrozoa/pdf/schuchert2005a.pdf The Faroes variation text 2005 ftciteseerx 2016-01-08T11:39:31Z Although the genus Halecium is easy to recognize, identifications at the species level are often difficult, this even for quite common and supposedly well-known species of the north-eastern Atlantic. This paper revises and re-describes some Halecium species which resemble each other closely and which are not easy to distinguish. Additional information on a few rare species is also provided. The study is based on material collected from the North Atlantic, Mediterranean, South Africa, and New Zealand. Halecium scutum Clark, 1877 is recognized as a valid species and distinct from both H. beanii and H. halecinum; colony form and microscopic characters allow a distinction. The pinnate colony form of H. halecinum is a characteristic trait, but not all colonies show this growth form. Halecium beanii can occur in monosiphonic and polysiphonic colonies. Monosiphonic colonies of H. beanii have probably been misidentified by some authors as H. lankesterii. The differences of H. lankesteri to H. beanii and H. petrosum are discussed. The South African population of the reportedly cosmopolitan H. beanii has distinct gonothecae and could belong to a separate species. The Mediterranean Halecium mediterraneum is hardly distinguishable from the New Zealandic H. delicatulum, but it is kept separate mainly for biogeographic reasons. The rare Mediterranean Halecium banyulense is re-described based on a second find from Naples. The male gonothecae of Halecium corrugatissimum are described for the first time. Text Faroes North Atlantic Unknown New Zealand |
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English |
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The Faroes variation |
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The Faroes variation Peter Schuchert Taxonomic revision and systematic notes on some Halecium species (Cnidaria, Hydrozoa |
topic_facet |
The Faroes variation |
description |
Although the genus Halecium is easy to recognize, identifications at the species level are often difficult, this even for quite common and supposedly well-known species of the north-eastern Atlantic. This paper revises and re-describes some Halecium species which resemble each other closely and which are not easy to distinguish. Additional information on a few rare species is also provided. The study is based on material collected from the North Atlantic, Mediterranean, South Africa, and New Zealand. Halecium scutum Clark, 1877 is recognized as a valid species and distinct from both H. beanii and H. halecinum; colony form and microscopic characters allow a distinction. The pinnate colony form of H. halecinum is a characteristic trait, but not all colonies show this growth form. Halecium beanii can occur in monosiphonic and polysiphonic colonies. Monosiphonic colonies of H. beanii have probably been misidentified by some authors as H. lankesterii. The differences of H. lankesteri to H. beanii and H. petrosum are discussed. The South African population of the reportedly cosmopolitan H. beanii has distinct gonothecae and could belong to a separate species. The Mediterranean Halecium mediterraneum is hardly distinguishable from the New Zealandic H. delicatulum, but it is kept separate mainly for biogeographic reasons. The rare Mediterranean Halecium banyulense is re-described based on a second find from Naples. The male gonothecae of Halecium corrugatissimum are described for the first time. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Peter Schuchert |
author_facet |
Peter Schuchert |
author_sort |
Peter Schuchert |
title |
Taxonomic revision and systematic notes on some Halecium species (Cnidaria, Hydrozoa |
title_short |
Taxonomic revision and systematic notes on some Halecium species (Cnidaria, Hydrozoa |
title_full |
Taxonomic revision and systematic notes on some Halecium species (Cnidaria, Hydrozoa |
title_fullStr |
Taxonomic revision and systematic notes on some Halecium species (Cnidaria, Hydrozoa |
title_full_unstemmed |
Taxonomic revision and systematic notes on some Halecium species (Cnidaria, Hydrozoa |
title_sort |
taxonomic revision and systematic notes on some halecium species (cnidaria, hydrozoa |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.553.2886 http://www.ville-ge.ch/mhng/hydrozoa/pdf/schuchert2005a.pdf |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
Faroes North Atlantic |
genre_facet |
Faroes North Atlantic |
op_source |
http://www.ville-ge.ch/mhng/hydrozoa/pdf/schuchert2005a.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.553.2886 http://www.ville-ge.ch/mhng/hydrozoa/pdf/schuchert2005a.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1765996413713383424 |