Paleobiogeography of the Macluritidae (Ordovician-Gastropoda)
4
Citation
0
Reference
20
Related Paper
Citation Trend
Cite
A biostratigraphic analysis of the Nelson Limestone, Neptune Range, Antarctica based on the distribution of trilobites in measured sections suggests that the age of the formation is probably late Floran to Undillan; the possibility of a Boomerangian age is considered less likely.The Nelsonia schesis and A mphoton oatesi zones are also defined.Paleobiogeographic analysis of trilobites in the Nelson Limestone using parsimony analysis of endemism (PAE) suggests that the Neptune Range and other parts of East Antarctica share the closest biogeographic area relationships with Australia rather than with northern Victoria Land or West Antarctica.This may have implications for the tectonic assembly of Antarctica.New specimens of previously described trilobite species from the Nelson Limestone include two new species, Peishania?neptunensis and Poriagraulos kaesleri.One species, Dorypyge sp.cf.D. australis, previously known only from the Bowers Terrane of northern Victoria Land, Antarctica, is recognized for the first time in the Neptune Range.
Cite
Citations (13)
Cite
Citations (8)
Cite
Citations (1)
Devonian
Cite
Citations (22)
Widespread pan-Gondwanan marine transgressions progressively flooded the Australian segment of Gondwana with the receding of Asselian glaciation. Brachiopod faunas invaded the basins of Irian Jaya, western Australia (Perth, Carnarvon, Canning, Bonaparte basins), eastern Australia (Tasmania, Sydney and Bowen Basins) and New Zealand. These Late Asselian-Tastubian faunas were of a wider eastern Gondwanan aspect (Indoralian Province), with widely shared genera such as Lyonia, Bandoproductus, Cyrtella, Tomiopsis and Trigonotreta. Associated sedimentary sequences are indicative of glaciation or ice rafting. During the Late Sakmarian (Sterlitamakian), two distinct provinces (the Westralian and the Austrazean) became established, separating the faunas of the western basins from those of the east. These provinces persisted for the remainder of the Permian Period. Westralian faunas show significant endemic development of Neochonetes, finely spinose Taeniothaerus, Neospirifer, Fusispirifer, Crassispirifer, and Imperiospira. Cimmerian genera, such as Demonedys Comuquia, Dyschrestia, Retimarginifera, Spirelytha, Spirigerella and Stenoscisma, invaded the Westralian Basins during times of warmer temperatures. Austrazean faunas of eastern Australia and New Zealand exhibit endemic development of Echinalosia, Wyndhamia, Pseudostrophalosia, Terrakea, Magniplicatina and the spiriferid Sulciplica. Genera of the Ingelarellidae show remarkable radiation within the Austrazean Province and include Tomiopsis, with over 40 species, Tabellina, Homevaiaria, Notospirifer, Farmerella, Glendonia, Kelsovia and Birchsella. Only Tomiopsis is reliably known in Permian faunas outside the Austrazean Province.
Cite
Citations (0)
Abstract Thirteen ostracod species including two new species, Clavofabellina fukujiensis n. sp. and Bythocypris wangi n. sp., are reported from the Middle Shale Member of the Fukuji Formation, Devonian of central Japan. The ostracods demonstrate species‐links with South China, indicating that the Hida‐Gaien Terrane of central Japan shared biogeographical affinities with the shallow marine faunas of the South China paleocontinent during the Early Devonian.
Devonian
Ostracod
Affinities
Late Devonian extinction
Cite
Citations (7)
Ceratopea Ulrich is interpreted as a gastropod whose description has been based heretofore only on its thickened operculum.Terminology is introduced, predicated on the assumption that the operculum is that of a dextral, low-spired shell.The operculum of Ceratopea is distinguished from that of Maclurites and other opercula occurring in Ordovician strata, by its muscle pit or pits and its peculiar tusklike shape.The orientation in life of the operculum is inferred from its morphology, witti the carina of the operculum being a reflection of the shell periphery.Other generalizations can be made about the shell.Most occurrences of opercula suggest sorting, but six collections of shells and opercula are known.Three of these contain well-preserved pleurotomarian shells fitting the general form inferred from the operculum.A new family, Ceratopeidae, is proposed for pleurotomarian gastropods with thickened opercula.The opercula alone do not furnish clear evidence as to whether the group is monophyletic or polyphyletic.Study of three associations of opercula and shells suggests that these shells are congeneric.From this, it is inferred that Ceratopea is monophyletic, though additional associations of shell and operculum are needed to prove this conclusively.Five species groups are recognized, based on the opercula, but they do not warrant formal taxonomic treatment or rank.Several Ceratopea species are widely distributed geographically and occur within well-defined stratigraphic units; thus, they are valuable guides to interregional correlation.All available geographic and detailed stratigraphic data on all species are summarized.All known species of Ceratopea are figured and described.Of 14 species recognized, 7 are new; 9 formerly named species are placed in synonymy.Ceratopea?pygmaea Stauffer is rejected from the genus but is redescribed.spent 5 days in the Arbuckle Mountains with Yochelson, guiding him to the best collecting localities and showing him the regional stratigraphy.
Cite
Citations (24)
Cape
Paleoecology
Cite
Citations (4)
Cite
Citations (3)
A distinct brachiopod fauna, composed of a mixture of Cordilleran Old World Realm (OWR) endemic genera, cosmopolitan and formerly endemic genera of the Appohimchi Subprovince of the Eastern Americas Realm (EAR), spread across central and eastern North America duringthe late Eifelian (upper part kockelianus Zone). The breakdown of North American Devonian brachiopod provincialism in the late Eifelian-earliest Givetian, as evidenced by mixing of EAR and OWR faunas in the US Midcontinent Devonian carbonate platforms (Iowa and Michigan basins) and Appalachian and Moose River basins, was a direct consequence of widespread transgression of the North American craton at this time. This late Eifelian sea level rise resulted in profound expansion of cratonic seaways that provided avenues for migrations of elements of formerly isolated North American brachiopod faunas. Rocks deposited during this transgression can be correlated in most successions in North America, which corresponds to the sea level rise of Devonian eustatic Transgressive-Regressive (T-R) cycle 1 e. OWR migrants found in U. S. midcontinent and eastern U. S. faunas include Variatrypa (V.) arctica, Spinatrypa borealis, Spinatrypina, Carinatrypa, Warrenella, W. (Warrenellina), Gypidula, Kayserella americana, shallow water species of Emanuella (E. sublineata, E. meristoides), Subrensselandia, and possibly Stringocephalus. Some of these, as well as the OWR Independatrypa occur with coeval faunas in the Moose River Basin of eastern Canada. Elements of this paleobiogeo-graphically mixed fauna are now known to occur in coeval deposits of: the Murray Island Formation in the Moose River Basin in Ontario; the Bakoven (upper part), Stony Hollow, and Hurley members of the Union Springs Formation in eastern New York; the Delaware Limestone of Ohio; the Rogers City Limestone of Michigan; the Lake Church Formation of eastern Wisconsin; the Spillville and Otis formations in northern and eastern Iowa; and the Elm Point Formation of southern Manitoba.
Devonian
Cite
Citations (4)