Browsing by Author "Zagorsek, Kamil"
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- ItemBryozoan genera Fenestrulina and Microporella no longer confamilial; multi-gene phylogeny supports separation(OXFORD UNIV PRESS, GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND, 2019-05) Orr, Russell J. S.; Waeschenbach, Andrea; Enevoldsen, Emily L. G.; Boeve, Jeroen P.; Haugen, Marianne N.; Voje, Kjetil L.; Porter, Joanne; Zagorsek, Kamil; Smith, Abigail M.; Gordon, Dennis P.; Liow, Lee HsiangBryozoans are a moderately diverse, mostly marine phylum with a fossil record extending to the Early Ordovician. Compared to other phyla, little is known about their phylogenetic relationships at both lower and higher taxonomic levels. Hence, an effort is being made to elucidate their phylogenetic relationships. Here, we present newly sequenced nuclear and mitochondrial genes for 21 cheilostome bryozoans. Combining these data with existing orthologous molecular data, we focus on reconstructing the phylogenetic relationships of Fenestrulina and Microporella, two species-rich genera. They are currently placed in Microporellidae, defined by having a semicircular primary orifice and a proximal ascopore. Our six-gene phylogenetic analysis reveals that the genera Fenestrulina and Microporella are each monophyletic, with the sister Glade to Microporella comprising non-microporellids. Our result hence supports the reinstatement of the family Fenestrulinidae Jullien, 1888 for Fenestrulina and genera with comparable frontal shield and ooecial morphologies. Our well-supported phylogeny, based on independent molecular data, lends credit to existing phylogenetic hypotheses based on morphological observations but does not conform to the current classification of these bryozoans. This illustrates the general need for a rethink of bryozoan higher level systematics, ideally based on both morphological and molecular data.
- ItemRevision of the Oligocene bryozoan taxa described by Stoliczka (1862), with the description of a new genus of Bryocryptellidae(Museum Natl Histoire Naturelle, 2014) Zagorsek, Kamil; Gordon, Dennis PaulA collection of bryozoans from the Oligocene of Latdorf, Germany, first described by Ferdinand Stoliczka in 1862 and not examined since, has been re-examined. Stoliczka had recognized 47 species, 24 of them new. Of these latter, 14 names remain valid; the remainder are synonyms of previously described taxa or, owing to the originally inadequate state of the fossil material examined, taxonomically indeterminable. The genera Orbitulipora Stoliczka, 1862 and Stichoporina Stoliczka, 1862, both introduced by Stoliczka in 1862 along with their type species, are still valid. Two of his species, one of which had not been examined since its first description, comprise a new bryocryptellid genus, Stoliczkella n. gen., which superficially resembles the celleporid genus Galeopsis Jullien & Calvet, 1903. Diagnoses or descriptions are provided herein for all of the taxa in the collection and lectotypes selected. The results of this revision will be applied to a forthcoming analysis of a recent extended excavation of the Latdorf section by the University of Leipzig, in which bryozoans are among the most abundant fossil groups.