scholarly journals Middle Cambrian trilobites from the Ekspedition Bræ Formation of North Greenland, with a reappraisal of the genusElrathina

2016 ◽  
Vol 91 (2) ◽  
pp. 265-293 ◽  
Author(s):  
Gerd Geyer ◽  
John S. Peel
Keyword(s):  
New Species ◽  
Type Species ◽  
Ontogenetic Development ◽  
Burgess Shale ◽  
Middle Cambrian ◽  
Fossil Assemblage ◽  
Detailed Assessment ◽  
Excellent Preservation ◽  
A New Species ◽  
North Greenland

AbstractThe richly fossiliferous Ekspedition Bræ Formation of North Greenland yields a typical oligospecific fossil assemblage with well-preserved trilobites, helcionelloids, and lingulate brachiopods. The trilobites includeItagnostus subhastatusnew species,Itagnostussp. cf.I.gaspensis(Rasetti, 1948),Elrathina aphroditenew species,Elrathina athenanew species,Elrathina heranew species, andElrathia groenlandicanew species—a fossil assemblage typical of theBathyuriscus-ElrathinaZone as known from the Cordilleran regions of Laurentia. Excellent preservation allows a detailed assessment of the prosopon and elucidates aspects of the ontogenetic development ofElrathinaandElrathia. An evaluation ofElrathinaincludes a redescription of its type species,E.cordillerae(Rominger, 1887), based on the type material, and indicates that most specimens collected from the Burgess Shale and previously dealt with asE.cordilleraerepresent a new species.

scholarly journals New records of Burgess Shale-type taxa from the middle Cambrian of Utah

2015 ◽  
Vol 89 (3) ◽  
pp. 411-423 ◽  
Author(s):  
Simon Conway Morris ◽  
Paul A. Selden ◽  
Glade Gunther ◽  
Paul G. Jamison ◽  
Richard A. Robison
Keyword(s):  
New Species ◽  
North America ◽  
Northwest Territories ◽  
Type Species ◽  
New Records ◽  
Western North America ◽  
Burgess Shale ◽  
Middle Cambrian ◽  
Stem Group ◽  
A New Species

AbstractCambrian strata of the Laurentian craton contain numerous examples of Burgess Shale–type faunas. Although displaying a more or less concentric distribution around the cratonal margin, most faunal occurrences are in present-day western North America, extending from the Northwest Territories to California. Nevertheless, the soft-bodied and lightly skeletalized fossils in most of these Lagerstätten are highly sporadic. Here, we extend knowledge of such Middle Cambrian occurrences in Utah with reports of four taxa. An arthropod from the Marjum Formation, Dytikosicula desmatae gen. et sp. nov., is a putative megacheiran. It is most similar to Dicranocaris guntherorum, best known from the younger Wheeler Formation, but differs primarily in the arrangement of pleurae and overall size. Along with a specimen of ?Yohoia sp, a new species of Yohoia, Y. utahana sp. nov., is described. It differs from the type and only known species, Y. tenuis, principally in its larger size and shorter exopods; it is the first description of this genus from outside the Burgess Shale. A new species of a stem-group lophotrochozoan from the Spence Shale, Wiwaxia herka sp. nov., possesses a palisade of dorso-lateral spines that are more robust and numerous than the type species of Wiwaxia, W. corrugata. Another notable taxon is Eldonia ludwigi from the Marjum Formation, which is interpreted as a primitive ambulacrarian (assigned to the cambroernids) and a new specimen of the ?cnidarian Cambrorhytium from the Wheeler Shale is illustrated.

Polypleuraspis (Arthropoda, Trilobita) from the middle Cambrian (Miaolingian Series) around Kane Basin (Nunavut and Greenland)

2020 ◽  
Vol 57 (1) ◽  
pp. 16-24
Author(s):  
John S. Peel
Keyword(s):  
British Columbia ◽  
New Species ◽  
North American ◽  
Type Species ◽  
Wood Formation ◽  
Ellesmere Island ◽  
Burgess Shale ◽  
Middle Cambrian ◽  
Shale Formation ◽  
A New Species

Polypleuraspis Poulsen, 1927, originally established on the basis of a single trilobite pygidium from the Cape Wood Formation of Inglefield Land, northwestern Greenland, is redescribed on the basis of material from additional occurrences in the Cape Wood and Telt Bugt formations exposed around Kane Basin in Ellesmere Island (Nunavut) and northern and northwestern Greenland. Polypleuraspis occurs together with Glossopleura Poulsen, 1927 in the Glossopleura walcotti Poulsen, 1927 Biozone of the Delamaran Stage of North American (Laurentian) usage, in middle Cambrian strata (Miaolingian Series) of the Wuliuan Stage. The type species, Polypleuraspis solitaria Poulsen, 1927, is compared with Polypleuraspis insignis Rasetti, 1951 from the Stephen Formation (Burgess Shale Formation) of British Columbia and to a new species from the Telt Bugt Formation of Daugaard-Jensen Land: Polypleuraspis glacialis sp. nov. Polypleuraspis cooperi Robison and Babcock, 2011, from the Spence Shale of Utah of similar age, is assigned to Polypleuraspidella gen. nov.

scholarly journals Tarimspirafrom the Cambrian (Series 2, Stage 4) of Laurentia (Greenland): extending the skeletal record of paraconodontid vertebrates

2018 ◽  
Vol 93 (1) ◽  
pp. 115-125
Author(s):  
John S. Peel
Keyword(s):  
New Species ◽  
Type Species ◽  
Weak Acid ◽  
Early Cambrian ◽  
Basal Cavity ◽  
Stage 4 ◽  
First Time ◽  
A New Species ◽  
North Greenland

AbstractPhosphatic sclerites of the problematicTarimspiraYue and Gao, 1992 (Cambrian Series 2) recovered by weak acid maceration of limestones display a unique range of mainly strongly coiled morphologies. They were likely organized into multielement scleritomes, but the nature of these is poorly known; some sclerites may have had a grasping function.Tarimspirasclerites grew by basal accretion in an analogous fashion to younger paraconodonts (Cambrian Series 3–4) but lack a basal cavity. Based on proposed homologies,Tarimspiramay provide an extension of the early vertebrate paraconodont–euconodont clade back into the early Cambrian.Tarimspirais described for the first time from Laurentia (North Greenland), extending its known range from China and Siberia in Cambrian Series 2. In addition to the type species,Tarimspira planaYue and Gao, 1992, the Greenland record ofTarimspiraincludes two morphotypes of a new species,Tarimspira artemi.UUID:http://zoobank.org/c7c536c8-cdaf-49a9-ae1d-77c392f553fc.

Middle Cambrian arthropods from Utah

2008 ◽  
Vol 82 (2) ◽  
pp. 238-254 ◽  
Author(s):  
Derek E. G. Briggs ◽  
Bruce S. Lieberman ◽  
Jonathan R. Hendricks ◽  
Susan L. Halgedahl ◽  
Richard D. Jarrard
Keyword(s):  
New Species ◽  
New Genera ◽  
Burgess Shale ◽  
Separate Species ◽  
Middle Cambrian ◽  
Stem Group ◽  
New Material ◽  
A New Species

The Middle Cambrian Spence Shale Member (Langston Formation) and Wheeler and Marjum Formations of Utah are known to contain a diverse soft-bodied fauna, but important new paleontological material continues to be uncovered from these strata. New specimens of anomalocaridids include the largest and smallest near complete examples yet reported from Utah. New material of stem group arthropods includes two new genera and species of arachnomorphs: Nettapezoura basilika and Dicranocaris guntherorum. Other new arachnomorph material includes a new species of Leanchoilia comparable to L. protogonia Simonetta, 1970; Leanchoilia superlata? Walcott, 1912; Sidneyia Walcott, 1911a; and Mollisonia symmetrica Walcott, 1912. L. protogonia from the Burgess Shale is confirmed as a separate species and is not a composite fossil. The first example of the trilobite Elrathia kingii preserving traces of the appendages is described. In addition, new material of the bivalved arthropods Canadaspis Novozhilov in Orlov, 1960; Branchiocaris Briggs, 1976; Waptia Walcott, 1912; and Isoxys Walcott, 1890 is described.

The Trilobite Genus Holasaphus Matthew, 1895 in the Middle Cambrian Rocks of Nova Scotia and Eastern Turkey

1972 ◽  
Vol 9 (3) ◽  
pp. 266-279 ◽  
Author(s):  
W. T. Dean
Keyword(s):  
New Species ◽  
Nova Scotia ◽  
Type Species ◽  
Middle Portion ◽  
Middle Cambrian ◽  
Upper Cambrian ◽  
Eastern Turkey ◽  
New Material ◽  
Additional Support ◽  
A New Species

Holasaphus centropyge Matthew, 1895, the type species of the genus, is redescribed using known and new material from the Middle Cambrian of Nova Scotia. A new species, Holasaphus mesopotamicus, described from the Derik–Mardin district of southeastern Turkey, marks the only other known occurrence of the genus. The presence there of Holasaphus and the agnostid Peronopsis in the middle portion of the Sosink Formation suggests that the latter may be no younger than Middle Cambrian and lends additional support to evidence for the probable regional absence of Upper Cambrian strata.

A new helcionelloid mollusk from the middle Cambrian Burgess Shale, Canada

2013 ◽  
Vol 87 (6) ◽  
pp. 1067-1070 ◽  
Author(s):  
Simon Conway Morris ◽  
John S. Peel
Keyword(s):  
British Columbia ◽  
New Species ◽  
Cambrian Explosion ◽  
Burgess Shale ◽  
Middle Cambrian ◽  
Marine Life ◽  
A New Species

Burgess Shale-type faunas provide unique insights into the Cambrian “explosion”. Their degree of representativeness of Cambrian marine life in general is, however, less easy to establish. One line of evidence is to consider only the skeletal component of a Burgess Shale-type fauna and compare that with a typical Cambrian assemblage. This paper describes a new species of helcionelloid mollusk (Totoralia reticulata n. sp.) from the middle Cambrian Burgess Shale of British Columbia. Whilst much rarer than the co-occurring smooth shelled helcionelloid Scenella amii, the strongly costate morphology of Totoralia reinforces comparisons with Cambrian shelly faunas. The extension of the range of Totoralia from Argentina to Canada adds support to the proposed derivation of the Precordillera terrane of Mendoza from Laurentia.

A Lower Cambrian Eotebenna (Mollusca) from Arctic North America

1989 ◽  
Vol 26 (7) ◽  
pp. 1501-1503 ◽  
Author(s):  
John S. Peel
Keyword(s):  
New Species ◽  
North America ◽  
North American ◽  
Lower Cambrian ◽  
Arctic Canada ◽  
Middle Cambrian ◽  
A New Species ◽  
North Greenland

The helcionellacean mollusc Eotebenna Runnegar and Jell, 1976 is described from the Lower Cambrian Henson Gletscher Formation of central North Greenland, part of the Franklinian Basin sequence of Arctic Canada and adjacent northern Greenland. The Henson Gletscher Formation specimens of Eotebenna are the first Lower Cambrian and North American records of a genus originally described from the Middle Cambrian of Australia. A new species, Eotebenna arctica, is described.

scholarly journals The stalked filter feeder Siphusauctum lloydguntheri n. sp. from the middle Cambrian (Series 3, Stage 5) Spence Shale of Utah: its biological affinities and taphonomy

2017 ◽  
Vol 91 (5) ◽  
pp. 902-910 ◽  
Author(s):  
Julien Kimmig ◽  
Luke C. Strotz ◽  
Bruce S. Lieberman
Keyword(s):  
New Species ◽  
Digestive Tract ◽  
Burgess Shale ◽  
Filter Feeder ◽  
Middle Cambrian ◽  
Additional Information ◽  
First Occurrence ◽  
Northern Utah ◽  
Filter Feeders ◽  
A New Species

AbstractWe describe a new species of enigmatic stalked filter feeder, Siphusauctum lloydguntheri, from the middle Cambrian (Series 3, Stage 5) Antimony Canyon locality of the Spence Shale of northern Utah. The described specimen is the only one known from the Spence Shale, represents the first occurrence of Siphusauctum outside the Burgess Shale, and is only the second described species from the genus. Siphusauctum lloydguntheri n. sp. differs from S. gregarium O’Brien and Caron, 2012 in the shape of its calyx and the position of the digestive tract. The new species provides some additional information about the possible affinities of enigmatic stalked Cambrian filter feeders, as well as the taphonomic pathways that lead to preservation of Siphusauctum.

A new species of the genus Parapachymorpha Brunner von Wattenwyl, 1893 (Phasmida, Phasmatidae, Clitumninae) from Laos

Zootaxa ◽  
2020 ◽  
Vol 4732 (1) ◽  
pp. 196-200
Author(s):  
CHANG-MOON JANG ◽  
YANG˗SEOP BAE
Keyword(s):  
New Species ◽  
Body Surface ◽  
Type Species ◽  
Lateral View ◽  
Lower Margin ◽  
Additional Species ◽  
The World ◽  
A New Species ◽  
Egg Capsule

Parapachymorpha is one of eight genera within the tribe Medaurini of subfamily Clitumninae (Phasmatidae). It was established by Brunner von Wattenwyl (1893), with the type species Parapachymorpha nigra by subsequent designation of Kirby (1904), from Myanmar. Species of this genus are widely distributed in oriental tropics (Laos, China, Thailand, Myanmar, Vietnam and Cambodia), with only 11 known species in the world (Brock et al. 2018, Ho 2017). Species of the genus Parapachymorpha can be recognized by following characters (Brunner von Wattenwyl 1893;1907, Henmemann & Conle 2008, Ho 2017): 1) body robust in female and slender in male with long leg in relation to the length; 2) body surface of female granulose or spinose; 3) mesonotum of female more and less expanded posteriorly; 4) abdominal tergites lacking expanded prostero–lateral angles in both sexes; 5) laminal supraanalis undeveloped in female; 6) semi–tergite of male irregularly rectangular, with an additional finger­–like ventro–apical appendix on the lower margin and reduced or absent; 7) egg capsule oval to oblong and covered with a raised net–like structure in lateral view; 8) micropylar plate oval; 9) operculum concave or convex. In the present study, we describe additional species, Parapachymorpha minuta sp. nov. from Laos, with photographs of both sexes of adults and egg. 

Description of a new species of Saliocleta Walker, 1862 (Lepidoptera, Notodontidae, Spatalinae, Ceirini) and description of S. notia Schintlmeister, 1997 female from Thailand

Zootaxa ◽  
2017 ◽  
Vol 4353 (3) ◽  
pp. 584
Author(s):  
MARKKU J. PELLINEN
Keyword(s):  
New Species ◽  
Male Genitalia ◽  
Type Species ◽  
Northern Thailand ◽  
A New Species

One new Saliocleta (type-species nonagrioides Walker, 1862), S. puyak sp. n., and the female of S. notia Schintlmeister, 1997 are described from Northern Thailand. The male genitalia structure of Saliocleta is examined in detail. 

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