... example of the crinoid recovery fauna after the Late Ordovician mass extinction. Hiiumaacrinus vinni n. gen. n. sp., Protaxocrinus estoniensis n. sp., Eomyelodactylus sp., calceocrinids, and five holdfast types are reported here. Although the fauna has relatively few taxa, it is among the most diverse...

...JAMES C. BROWER Abstract Quintuplexacrinus new genus with Dendrocrinus oswegoensis Meek and Worthen (1868) as the type and only known species is described and assigned to the Merocrinidae. The new genus is characterized by a unique stem with a highly pentalobate axial canal; the distal column...

... Isocrinidae. Stem pentastellate to pentalobate. Noditaxes short. Cirral scars small, directed outwards and slightly upwards. Symplectial areolae elongate elliptical. Adradial crenulae of adjacent areolae separated by a furrow or smooth band. Cryptosymplectial articula with first and second order crenulae...

... Ordovician-Silurian boundary section recording shallow-water habitats. Both new taxa and changes in Anticosti Island stratigraphic nomenclature are addressed herein. New taxa include Becsciecrinus groulxi n. sp., Bucucrinus isotaloi n. sp., Jovacrinus clarki n. sp., Plicodendrocrinus petryki n. sp...

... 38617; 18 columnals and pluricolumnals), which typically have a pentalobate to pentapetaloid lumen, a circular areola and a marginal symplexy with radial crenulae, but lack an epifacet, quite commonly have branched crenulae and may lack an areola. This collection probably represents two or more taxa...

... of Cyclocyclicus (col.) in the same interval ( Webster and Webster 2014 ). Diagnosis . (This is slightly modified after Donovan 1995 , p. 151.) Pentagonal pelmatozoan columnals with a central, pentagonal to pentalobate lumen coincident with the columnal angles; pentagonal areola present or absent...

... was not equally distributed. Mississippian crinoid diversity was lower in the British Isles than in North America due to the absence of cosmopolitan species in some crinoid clades ( Ausich & Kammer 2006 , 2013 ). Uneven distributions of crinoid taxa are seen not only between continents, but also within more...

...E. Głuchowski; G. Racki SUMMARY Fourteen stem-based crinoid taxa from the Devonian and Carboniferous of north Devon are described. Salairocrinus cf. kervenensis Le Menn, is from the Givetian Ilfracombe Beds at Combe Martin, and the remaining taxa occur in the Famennian–Tournaisian Pilton Beds...

... China, are described. The former two taxa originally were described as one species, Entrochus rotiformis Koken, 1900, which is a nomen dubium. The two new genera Qingyanocrinus and Bangtoupocrinus are established. Bangtoupocrinus and Silesiacrinus are the earliest known millericrinid genera...

... arms and tube feet are nil ( Fig. 3.1 ). These velocities increase exponentially with progressively larger current speeds. The current velocities through the arms and their tube feet are significantly lower than the ambient current outside of the filtration net. The velocity profiles of the three taxa...

... types described below, the Albian crinoid fauna has at least four taxa, which is unexpected because stalked crinoids are generally restricted to deep-water habitats by the Late Cretaceous, and by the end of the Cretaceous, shallow-water stalked crinoids are exceedingly rare ( Meyer and Macurda 1977...

... Lagerstätte, which is predominantly comprised of cladids (Eucladida and Flexibilia). We document 15 species across 11 genera, including descriptions of two new genera and four new species. New taxa include Konieckicrinus brechinensis n. gen. n. sp., K . josephi n. gen. n. sp., Simcoecrinus mahalaki n. gen. n...

... specimens known in the world and more than quadrupled the number of known taxa. Latest Devonian (Famennian) and earliest Carboniferous stemmed-echinoderm (pelmatozoan) faunas traditionally have been considered to be very low diversity relative to earlier Frasnian and later Early Carboniferous faunas...

... are commonly preserved in trauma postures, which is characteristic of burial in episodic high turbulence events. The paleoenvironments and taxa of the two Cuyahoga Formation crinoid faunas more closely resemble Viséan faunas in siliciclastic settings than typical carbonate faunas of the Tournaisian. UUID: http...

... ubiquitous taxa, occurring in siliciclastic and carbonate facies and in both shallow- and deep-water settings. Alloprosallocrinus conicus had a preference for carbonate settings, but Macrocrinus mundulus was locally abundant in both facies types. Abatocrinus steropes and Uperocrinus nashvillae...

.... gen. n. sp., Cleiocrinus regius , and Cleiocrinus lepidotus n. sp. The exceptional preservation of this collection provides an opportunity to describe more fully the morphologic and ontogenetic details of known Ordovician crinoid taxa, to conduct a taxonomic re-evaluation of many species, to describe...

... in almost 70 years. This paper is the first in a series of studies re-describing echinoderm taxa from these biogeographically important Paleozoic assemblages. Pentremites globosus Chen and Yao, 1993 is designated as the type species of Sinorbitremites , a new genus of orbitremitid blastoids. Pentremites...

... descriptions of isolated echinoderm ossicles exclusive of calyx (primarily radial) plates, although very useful for paleoecology, taphonomy, sedimentology, and biostratigraphy, are, out of necessity, descriptions of morphotaxa rather than biological taxa. Incorporation of disarticulated material has led...

... environment, which agrees with the paleogeographic position previously recognized for the Bird Spring Formation. New taxa introduced are: Poteriocrinites permicus n. sp., Bridgerocrinidae n. fam., Ekteinocrinus battleshipensis n. gen. and sp., Arroyocrius brachiatus n. sp., Plummericrinus jelli n. sp...

...WILLIAM I. AUSICH; ARTUR A. SÁ; JUAN C. GUTIÉRREZ-MARCO Abstract A comprehensive treatment of Ordovician crinoids from southwestern Europe is presented, including taxa based on articulated crowns and stems. This summary incorporates new material, new localities, and a revision of some...