Palæontology of New-York

Hall, Jim W.; Clarke, John Mason; Simpson, George

doi:10.5962/bhl.title.66970

Cited by 78 publications

(40 citation statements)

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“…Occurrence of more than one Ceratiocaris species in the Waukesha Biota is not unexpected, as both C. macroura and C. papilio are known to occur in the Eramosa Biota of Ontario; and C. acuminata Hall, 1859, andC. maccoyanus Hall, 1859, are known to occur in the Upper Silurian Bertie Group of New York (Collette and Hagadorn, 2010).…”

Section: Introductionmentioning

confidence: 94%

Ceratiocarisfrom the Silurian Waukesha Biota, Wisconsin

2015

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Phyllocarids of the Waukesha Biota were systematically and taphonomically evaluated. Three Ceratiocaris species are present in the biota: C. macroura Collette and Rudkin, 2010; C. papilio Salter in Murchison, 1859; and C. pusilla Matthew, 1889. Specimens range in completeness from nearly complete, including the cephalic to caudal regions, to isolated telsons and furcae. Evidence of Salter's position is present in only three specimens. Relatively complete specimens are interpreted to represent corpses, rather than molts; whereas specimens including only the pleon and caudal region, or caudal region, and specimens with evidence of Salter's position likely represent exuviae. Specimens are preserved essentially as compression fossils exhibiting two types of preserved cuticle: brown inner cuticle, which tends to be impressed over the topography of bedding planes on which specimens are preserved, and blue-gray phosphatized cuticle exhibiting sub-millimeter scale relief. Cuticle phosphatization likely occurred during early diagenesis. The presence of characteristic near-shore species and C. pusilla, only known from turbidite facies, interpreted to possibly represent a marine trough, suggests that the Waukesha phyllocarid assemblage might represent a transported assemblage, rather than a biota, or that C. pusilla from the Jones Creek Formation was transported basinward in sediment gravity flows.

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Section: Introductionmentioning

confidence: 94%

Ceratiocarisfrom the Silurian Waukesha Biota, Wisconsin

2015

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“…Vossler and Pemberton 1988), and have contributed to the general knowledge of life history, ecology and ethology of bivalves (Kim 1994). Palaeophycus tubularis Hall, 1847. Remarks. Represented by endichnial horizontal to subhorizontal lined burrow up to 1.2 cm wide.…”

Section: Historical Biologymentioning

confidence: 98%

Integrated study of fauna and microflora from the Early Devonian (Pragian–Emsian) of northwestern Argentina

et al. 2015

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The Devonian System in northern Argentina has been broadly analysed, but details of its lithologies, biostratigraphy and fossil content have not been presented in a comprehensive study. We performed the first integrative analysis of the palynological and macrofossil content from the Pescado Formation at the Zenta Range, Argentina. We define a new species of cryptospore and extend the stratigraphic record of the ichnogenus Psammichnites isp. for South America. The stratigraphic ranges of the palynomorphs suggest a time span from the ?late Lochkovian to Pragian -earliest Emsian, but the co-occurrences of key invertebrates narrow the age of the beds to the late Pragian and early Emsian. Moreover, sedimentary analysis indicates a proximal shoreface -foreshore depocenter during this time range for the Zenta region. The contraction phase of the basin during the middle Pragian and Emsian is evidenced by the presence of sand bodies at the top of the column and the higher supply of terrigenous components. During this regression event, a low diversity Malvinokaffric Realm brachiopod assemblage occurs, with dominance of Australospirifer hawkinsi. The predominance of the latter species during this event is coeval with the first decline of the Malvinokaffric Realm in the neighbouring Paraná basin.

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“…9). Hypostomal data for Erratencrinurus are supplemented with those for Erratencrinurus vigilans (Hall, 1847); this species and Erratencrinurus nebeni Krueger,197 1 are used for thoracic characters (which are unknown for E. kauschi). Although recent workers (Ludvigsen 1979;DeMott 1987) have assigned E. vigilans to Encrinuroides, it shares numerous diagnostic characters of Erratencrinurus (e.g .…”

Section: Phylogenetic Analysismentioning

confidence: 99%

Systematics of Encrinuroides and Curriella (Trilobita), with a new Early Silurian encrinurine from the Mackenzie Mountains

Edgecombe¹,

Chatterton²

1990

Can. J. Earth Sci.

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has been diagnosed as a paraphyletic ancestral taxon since its inception. Cladistic parsimony analysis of "Encrinuroides" species most closely related to the Silurian Encrinurus plexi discovers two shortest-length cladograms (consistency index = 0.68) based on 28 exoskeletal characters. Curriella Lamont, 1978 is revised to include Curriella clancyi n.sp., based on silicified material from earliest Llandovery strata of the Whittaker Formation in the Mackenzie Mountains, Northwest Territories. The new species is most closely related to the Scottish Llandovery type species, Curriella newlandensis Lamont, 1978 (for which type specimens are figured) and Curriella tuberculifrons (Weller, 1907) from Illinois. This Silurian clade is sister group to stratigraphically early Chinese "Encrinuroides" species and the monophyletic Encrinurus plexi. Certain Appalachian Caradoc taxa and Erratencrinurus Krueger, 1972 are more closely related to this group than to many other "Encrinuroides" spp. Further taxonomic revision should exclude these species from Encrinuroides (s.s.), which can be appreciably restricted in scope.Encrinuroides Reed, 1931 a Ct C diagnostiquke dbs sa dkcouverte comme un taxon ancestral paraphylCtique. Une analyse cladistique parcimonieuse de l'esptce << Encrinuroides >>, dont le plus proche parent est Encrinurus plexi du Silurien, indique deux cladogrammes courtes branches (index de consistance = 0,68) fond& sur 28 caracttres d'exosquelettes. Curriella Lamont, 1978 a Ct C rCvisCe de manitre a inclure Curriella clancyi n.sp., suite a une Ctude de matBrie1 silicifiC recueilli dans les strates du Llandovery de la Formation de Whittaker, dans les monts Mackenzie des Territoires du Nord-Ouest. La nouvelle e s g c e a pour plus proches parents l'esgce-type Curriella newlandensis Larnont, 1978 du Llandovery de 1'Ecosse (dont les spt5cimens types sont illustrCs) et Curriella tuberculifrons (Weller, 1907) de 1'Illinois. Le cladogramme silurien reprksente des espbces trbs Ctroitement apparentkes a Encrinuroides et 21 Encrinurus plexi monophyl6tique. Certains taxons du Caradoc des Appalaches et Erratencrinurus Krueger, 1972 sont plus apparentkes avec ce groupe qu'avec plusieurs autres << Encrinuroides >> spp. Les rCvisons taxonomiques futures devraient exclure ces esgces d'Encrinuroides (s.~.), lesquelles couvriraient une ttendue considkrablement plus restreinte. [Traduit par la revue]Can.

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Palæontology of New-York

Cited by 78 publications

References 0 publications

Ceratiocarisfrom the Silurian Waukesha Biota, Wisconsin

Ceratiocarisfrom the Silurian Waukesha Biota, Wisconsin

Integrated study of fauna and microflora from the Early Devonian (Pragian–Emsian) of northwestern Argentina

Systematics of Encrinuroides and Curriella (Trilobita), with a new Early Silurian encrinurine from the Mackenzie Mountains

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