Texanoceras, a new neptunoceratid cephalopod genus from the Upper Pennsylvanian Graham and Caddo Creek formations in north-central Texas

2011 ◽  
Vol 85 (3) ◽  
pp. 519-523 ◽  
Author(s):  
Shuji Niko ◽  
Royal H. Mapes
Keyword(s):  
North America ◽  
Taxonomic Position ◽  
North Central ◽  
The Family ◽  
North Central Texas ◽  
Central Texas ◽  
New Material ◽  
Single Genus

A neptunoceratid cephalopod, Texanoceras jacksboroensis n. gen. n. sp., is described from the Virgilian (Upper Pennsylvanian) Graham and Caddo Creek Formations in Texas, North America. The family Neptunoceratidae was previously represented by a single genus, Tetrapleuroceras. This new material provides important emendations to the diagnostic concept of the enigmatic family including shell orientation, mature modification and siphuncular structure. Although higher taxonomic position of Neptunoceratidae is difficult to determine at present, morphologic similarities between the family and the orthoceratid (?) family Brachycycloceratidae are discussed.

Pennsylvanian sponges from the Graford Formation, Wise County, Texas

2008 ◽  
Vol 82 (3) ◽  
pp. 492-510
Author(s):  
J. Keith Rigby ◽  
Mark G. McKinzie ◽  
Brooks B. Britt
Keyword(s):  
New Genus ◽  
New Genus And Species ◽  
North Central ◽  
The Family ◽  
North Central Texas ◽  
Central Texas ◽  
Hexactinellid Sponges

A variety of Pennsylvanian sponges have been recovered from exposures along the shore of Lake Bridgeport and in nearby areas in Wise County, north-central Texas. Calcareous and hexactinellid sponges have locally weathered out of the Jasper Creek Shale (= upper Lake Bridgeport Shale) and the overlying Devil's Den Limestone of the Graford Formation, of Late Pennsylvanian Missourian age.The Demospongea protomonaxonids Heliospongia excavata King, 1933, and Coelocladia spinosa Girty, 1908 are represented in the studied collections by several specimens, as is the new genus and species Luterospongia texana. Agelasid ceractinomorph demosponges are represented by the fissispongiid Fissispongia jacksboroensis King, 1938, the maeandrostiid Maeandrostia kansasensis Girty, 1908, and the girtycoeliid, Girtycoelia typica King, 1933. Sponges of the Class Hexactinellida and the amphidiscophorid Family Stiodermatidae are represented by an extensive suite of specimens of the new genus and species Dermosphaeroidalis irregularis. Representatives of the hexactinellid reticulosid sponges include some unusually large specimens of the vase-shaped Endoplegma calathus Finks, 1960, of the Family Docodermatidae, and fragmental specimens of ?Stereodictyum orthoplectum Finks, 1960, of the Family Stereodictyidae. One unclassified root tuft fragment is also described and illustrated.Much of this diverse sponge fauna was endemic to the western embayment of Pangaea.

scholarly journals Late Pennsylvanian and Permian Turrilepadida (Machaeridia) from the western and south-central United States

1992 ◽  
Vol 6 ◽  
pp. 154-154 ◽  
Author(s):  
Maurice E. Kaasa
Keyword(s):  
North Central ◽  
South Central ◽  
Southern Nevada ◽  
Marine Carbonate ◽  
Muddy Bottom ◽  
The Family ◽  
North Central Texas ◽  
Central United States ◽  
Mollusc Species ◽  
Central Texas

The Machaeridia is an enigmatic marine fossil group which has been variously allied with the cirripedians, molluscs, annelids, and echinoderms. Although machaeridians have previously been unreported from rocks younger than earliest Pennsylvanian (late Namurian), members of the machaeridian order Turrilepadida are now found to be locally abundant well into the Permian. New occurrences of turrilepadidan sclerites are reported from the Late Pennsylvanian of Texas and the Early Permian of Texas and Nevada.Turrilepadidan sclerites are common in marine shales of Missourian and Virgilian age in north-central Texas. Well preserved turrilepadidan sclerites have been found in the Wolf Mountain Shale (Missourian) and in the Colony Creek, Finis, and Necessity Shales (Virgilian) of north-central Texas. A few sclerites have a high number of closely spaced rugae and are similar to those of Turrilepas, but the most common types of sclerites have relatively few, widely spaced rugae, and many of these show radial ornament like that found on sclerites assigned to the genus Clarkeolepis. Although most forms would be placed in the family Turrilepadidae, a partial specimen from the Finis Shale appears to be a lepidocoleidid sclerite.Silicified sclerites of Permian age have been found in two marine carbonate units: the upper part of the Bird Spring Formation (late Wolfcampian or early Leonardian) of southern Nevada and in the Cathedral Mountain Formation (Leonardian) of West Texas. Although their details are generally poorly preserved, these sclerites appear to be representative of members of the family Turrilepadidae with a different taxon found at each of the two localities.The paleoecology of turrilepadidans is not well known, but each of these occurrences is from a locality that represented an area with a muddy bottom, a slow rate of deposition, and an unusually diverse fauna. The fauna at each horizon is dominated by a large number of brachiopod and mollusc species, many of which were conspicuously encrusted or bored during life or afterwards. Although a few of the sclerites show postmortem encrustations on their inner or outer surfaces, the overall lack of borings or encrustations suggests that the turrilepadidans were mobile, possibly infaunal organisms.

scholarly journals Brush Control and Rio Grande Turkeys in North-Central Texas

1980 ◽  
Vol 33 (2) ◽  
pp. 95
Author(s):  
Dee A. Quinton ◽  
Alan Kent Montei ◽  
Jerran T. Flinders
Keyword(s):  
Rio Grande ◽  
North Central ◽  
North Central Texas ◽  
Central Texas ◽  
Brush Control
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