Enigmatic fossil encrusting an Upper Ordovician rocky shore on Hudson Bay, Canada

1998 ◽  
Vol 72 (5) ◽  
pp. 927-932 ◽  
Author(s):  
Markes E. Johnson ◽  
Mu Xi-Nan ◽  
Rong Jia-Yu
Keyword(s):  
Green Algae ◽  
Colony Size ◽  
Rocky Shore ◽  
New Genus ◽  
Transverse Section ◽  
Longitudinal Section ◽  
Hudson Bay ◽  
New Genus And Species ◽  
Upper Ordovician ◽  
Maximum Thickness

Storeacolumnella hudsonensis is described as a new genus and species of encrusting, colonial organism that lived in an intertidal, rocky-shore environment. The fossil was discovered in the basal beds of the Upper Ordovician Port Nelson Formation at a coastal outcrop on Hudson Bay near Churchill, Manitoba. Showing some possible characteristics of sponges and other possible characteristics of calcaerous green algae, this matlike organism is considered nonetheless to have uncertain taxonomic affinities. It consists of cylinder-shaped columns, each with an internal system of star-shaped filaments or spicules as viewed in transverse section. The cylinders stand vertical in longitudinal section and are densely packed together to form a mat. The hard substrate to which the mat is attached consists of a boulder eroded from the Precambrian Churchill Quartzite. Maximum colony size observed in a single example exhibits a diameter of not less than 80 mm and maximum thickness of 5.85 mm.

Enigmatic fossil encrusting an Upper Ordovician rocky shore on Hudson Bay, Canada, is a coral

2000 ◽  
Vol 74 (1) ◽  
pp. 179-180 ◽  
Author(s):  
Robert J. Elias ◽  
Graham A. Young
Keyword(s):  
Green Algae ◽  
Rocky Shore ◽  
New Genus ◽  
Hudson Bay ◽  
New Genus And Species ◽  
Upper Ordovician ◽  
Taxonomic Affinity ◽  
Carbonate Matrix

An enigmatic encruster from the Upper Ordovician rocky shore exposed near Churchill, Manitoba, was recently described by Johnson et al. (1998). The specimen was found attached to a quartzite boulder enclosed in carbonate matrix. The matlike, calcareous fossil consists of densely packed, vertical, cylindrical columns with upward-radiating structures issuing from their centers. It was identified as a new genus and species, Storeacolumnella hudsonensis, of uncertain taxonomic affinity but with possible characteristics of sponges and calcareous green algae. In particular, the radiating structures within columns were compared with spicules of a sclerosponge and with the siphon system of siphonous green algae.

Spiracarneyella, a new carneyellid edrioasteroid from the Upper Ordovician (Katian) of Kentucky and Ohio and comments on carneyellid heterochrony

2020 ◽  
pp. 1-6
Author(s):  
Colin D. Sumrall ◽  
Daniel Phelps
Keyword(s):  
New Genus ◽  
New Genus And Species ◽  
Upper Ordovician ◽  
The Right ◽  
Oral Area

Abstract A new genus and species of carneyellid edrioasteroid, Spiracarneyella florencei n. gen. n. sp., is described from the Upper Ordovician (Kaitian) Point Pleasant Formation of northern Kentucky and southern Ohio. Spiracarneyella n. gen. is characterized by having all five ambulacra curving clockwise around the theca, having small node-bearing interambulacral plates in the distal interambulacra, and having the periproct placement slightly offset to the right side of the CD interambulacrum. The oral area of carneyellids evolved by paedomorphosis of the oral plates covering the mouth. The straight ambulacra of Cryptogoleus and the spiraling ambulacra of Spiracarneyella n. gen. evolved by paedomorphosis and peramorphosis, respectively. UUID: http://zoobank.org/79733c8f-0bc8-4e7e-8f77-8508f576755c

New cyclocystoid (Phylum Echinodermata) from Anticosti Island, Quebec, and its bearing on cyclocystoid life modes

2003 ◽  
Vol 77 (5) ◽  
pp. 949-957 ◽  
Author(s):  
Alexander Glass ◽  
William I. Ausich ◽  
Paul Copper
Keyword(s):  
New Genus ◽  
Trace Fossil ◽  
Suspension Feeding ◽  
New Genus And Species ◽  
Upper Ordovician ◽  
Feeding Mode ◽  
Fossil Evidence ◽  
Anticosti Island ◽  
Bedding Surface

Nicholsodiscus anticostiensisnew genus and species (Mill Bay Member, Vauréal Formation, Rawtheyan, Upper Ordovician) is described from Anticosti Island, Quebec, Canada.Nicholsodiscus anticostiensisn. gen. and sp. is known from two complete specimens preserved in situ with the cupule-bearing side facing toward the bedding surface. Sedimentological, petrographic, and trace fossil evidence suggest that this bedding surface had the consistency of a hardground during the lifetime of the cyclocystoids. This provides the first unequivocal evidence that cyclocystoids lived with their cupule-bearing side (ventral) toward the substratum. A cupules-down orientation results in the ambulacral grooves facing the substratum. Such an orientation excludes suspension-feeding from being a possible feeding mode of the Cyclocystoidea as discussed by Henderson and Shergold (1971).A third Anticosti Island cyclocystoid specimen of unknown affinities is described from the same locality. Furthermore, a re-examination of the holotype of“Cyclocystoides” raymondiFoerste for purposes of comparison withNicholsodiscus anticostiensisn. gen. and sp. provided evidence that it is a member ofZygocycloides, albeit with missing interseptal plates.

Bromidechinus, a new Ordovician echinozoan (Echinodermata), and its bearing on the early history of echinoids

2001 ◽  
Vol 92 (2) ◽  
pp. 137-147 ◽  
Author(s):  
Andrew B. Smith ◽  
Jeremy J. Savill
Keyword(s):  
New Genus ◽  
Morphological Evolution ◽  
Cladistic Analysis ◽  
Early History ◽  
Main Line ◽  
New Genus And Species ◽  
Upper Ordovician ◽  
History Of

ABSTRACTA new genus and species of primitive echinozoan, Bromidechinus rimaporus, is described from the Upper Ordovician of Oklahoma, USA. This has a unique plate arrangement. There is a single perradial series of imperforate plates bounded on either side by a column of perforate ambulacral plates. A double column of interambulacral plates separates ambulacral zones. The sparse record of Ordovician echinozoans is reviewed and cladistic analysis suggests that Bromidechinus represents a lineage that diverged prior to the split between bothriocidarids and main-line echinoids. This leads to a revised interpretation of the earliest stages of morphological evolution of echinoids.

A new genus and species of enigmatic gorgonian coral from the Ryukyu Archipelago, northwestern Pacific, with a discussion of calcaxonian systematics (Cnidaria, Anthozoa, Octocorallia)

Zootaxa ◽  
2019 ◽  
Vol 4701 (5) ◽  
pp. 417-433
Author(s):  
GARY C. WILLIAMS
Keyword(s):  
New Genus ◽  
Transverse Section ◽  
Morphological Characters ◽  
Northwestern Pacific ◽  
Molecular Evidence ◽  
New Taxon ◽  
New Genus And Species ◽  
Gorgonian Coral ◽  
New Family ◽  
The Western Pacific

A new genus and species of flagelliform gorgonian coral is described from mesophotic depth in the western Pacific Ocean. The new taxon exhibits calcaxonian morphological characters and shares affinities to both the clade that includes the Chrysogorgiidae, Primnoidae, and Isididae, as well as the clade that includes the Ellisellidae and the Pennatulacea. Based on morphology alone, placement in a new family is likely justifiable, since it exhibits some characters similar to several diverse calcaxonian taxa, and has unique features as well, but such an outcome awaits supporting molecular evidence. The new genus and species is remarkable among most octocorals in that it has an axis that is quadrangular in transverse section as in the calcaxonian Flagelligorgia gracilis and the pennatulacean Funiculina quadrangularis, and an apparently uniform, solid, highly calcified axial structure that lacks concentric layers or prismatic radiating wedges. In addition, it has distinctive sclerites of the surface coenenchyme that are predominantly elongate warty spindles with median waists, some of which superficially resemble sclerites found in some species of ellisellid gorgonians, but also exhibit ultrastructural features that differentiate them. 

Rousseauspira: new gastropod operculum from the Ordovician of Alaska and California

1987 ◽  
Vol 61 (2) ◽  
pp. 284-289 ◽  
Author(s):  
David M. Rohr ◽  
A. W. Potter
Keyword(s):  
New Genus ◽  
New Genus And Species ◽  
Upper Ordovician ◽  
Middle Ordovician ◽  
Shallow Subtidal

Rousseauspira teicherti, a new genus and species of an unusual, untwisted, horn-shaped gastropod operculum from shallow-subtidal limestones of the Upper Ordovician of Alaska and the Middle Ordovician of California, is described and compared to two other Ordovician opercula,CeratopeaUlrich, 1911, andTeiichispiraYochelson and Jones, 1968. The shell to which the operculum belonged is not yet known.

New genus and species of subfamily Trinodinae (Coleoptera, Polyphaga, Dermestidae) from Lowermost Eocene French amber

2010 ◽  
Vol 19 (1) ◽  
pp. 54-69
Author(s):  
A.G. Kirejtshuk ◽  
J. Háva ◽  
A. Nel
Keyword(s):  
New Species ◽  
New Genus ◽  
Short Review ◽  
New Genus And Species ◽  
New Tribe ◽  
Fossil Records

In the paper six new species of the genus Oisenodes gen. nov. (Dermestidae, Trinodinae, Trinodini) are described: O. azari sp. nov., O. clavatus sp. nov., O. gallicus sp. nov., O. metepisternalis sp. nov., O. oisensis sp. nov. and O. transversus sp. nov. A new tribe Trinoparvini Hava, trib. nov. is established for the recent genus Trinoparvus Háva, 2004. Short review of known fossil records of the subfamily Trinodinae is given.

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