Blar i Department of Natural History på forfatter "Oskars, Trond Roger"
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Diversity and systematics of philinid snails (Gastropoda: Cephalaspidea) in West Africa with remarks on the biogeography of the region
Malaquias, Manuel Antonio E.; Ohnheiser, Lena Tina; Oskars, Trond Roger; Willassen, Endre (Peer reviewed; Journal article, 2016)West Africa is often considered one of the least studied regions of the world concerning marine biodiversity. Knowledge about the philinid snails of the region has largely been based on shells, but shells can be insufficient ... -
A molecular phylogeny of the Indo-West Pacific species of Haloa sensu lato gastropods (Cephalaspidea: Haminoeidae): Tethyan vicariance, generic diversity, and ecological specialization
Oskars, Trond Roger; Malaquias, Manuel Antonio E. (Peer reviewed; Journal article, 2019-07-06)The cephalaspidean gastropod genus Haminoea has been considered a worldwide radiation with species living in intertidal and shallow areas with algae, seagrass sandy-mud, mangroves, and coral reefs. Recently this monophyletic ... -
New observations of the enigmatic West African Cellana limpet (Mollusca: Gastropoda: Nacellidae)
Willassen, Endre; Williams, Akanbi Bamikole; Oskars, Trond Roger (Peer reviewed; Journal article, 2016-07-25)Background: Identification of limpets is often hampered by highly variable within-species shell morphologies and colour patterns. Since pre-Linnean times this has produced complex taxonomies with confusing nomenclatorial ... -
A new phylogeny of the Cephalaspidea (Gastropoda: Heterobranchia) based on expanded taxon sampling and gene markers
Oskars, Trond Roger; Bouchet, Philippe; Malaquias, Manuel Antonio E. (Peer reviewed; Journal article, 2015-08)The Cephalaspidea is a diverse marine clade of euthyneuran gastropods with many groups still known largely from shells or scant anatomical data. The definition of the group and the relationships between members has been ... -
A new species of the deep-sea genus Scaphander (Gastropoda, Cephalaspidea) from the Mar del Plata submarine canyon off Argentina
Siegwald, Justine; Pastorino, Guido; Oskars, Trond Roger; Malaquias, Manuel Antonio E. (Journal article; Peer reviewed, 2020)Scaphander Montfort, 1810, is a genus of deep-sea, soft-bottom gastropods composed of approximately 23 species distributed worldwide. The systematics of the genus in the Atlantic was recently revised and eight species were ... -
The systematics and phylogeny of Haminoeidae (Mollusca, Cephalaspidea), with special focus on the taxonomy and phylogeny of the genus Haloa sensu lato
Oskars, Trond Roger (Doctoral thesis, 2019-04-01)The family Haminoeidae consist of herbivorous snails found worldwide in tropical to temperate shallow waters on reefs, seagrass beds, rocky shores and mangroves. The family is the most diverse within the Order Cephalaspidea, ... -
The temperate Australasian genus Papawera Oskars and Malaquias, 2019 (Gastropoda: Cephalaspidea: Haminoeidae), with a redescription of P. zelandiae and P. maugeansis
Oskars, Trond Roger; Malaquias, Manuel Antonio E. (Journal article; Peer reviewed, 2020)The genus Papawera includes two species of haminoeid snails found only in temperate waters of New Zealand and southeastern Australia. In this work, we redescribe the Papawera species based on characters of their external ...