Paleonet: New publication available

[Paula M. Mikkelsen]

Paleontological Research Institution is proud to announce publication of Bulletins of American Paleontology, nos. 384-386 (combined issue), " Studies on the Molluscan Paleomacrofauna of the Texas Paleogene," by  Christopher L. Garvie (216 pp., 22 pls, ISBN 978-0-87710-500-8). The retail price is US $60.00.

This issue contains three monographs.
384, The Molluscan Macrofauna of the Seguin Formation (Upper Paleocene) in Central Texas.
Abstract: Investigation of known Seguin localities led to the discovery of an overlooked diverse and abundant marine fauna in Solomon's Branch, a stream in Bastrop County, Texas. The fauna, a transported assemblage from a marine littoral environment, encompasses a mix of specimen types from large wave-worn individuals to the smallest unworn ornamented species. Following the discovery of this fauna, further field work was undertaken and other Seguin localities with different depositional environments were found and collections made from those sites. Finally, a further suite of specimens was examined within the Texas Natural Science Center, some from localities no longer in existence or now lost. The environment is transitional in character from the deeper water Midway to the nonmarine environment of the chiefly terrestrial Texas Wilcox deposits, and represents the last major marine transgression in this area prior to the Eocene. The fauna is a mix of that derived from early Paleocene and Cretaceous taxa as well as elements that appear to originate  from western Africa, the Tethyan region, and the western coast of America. The inferred species' habitat includes a near-shore open marine element, a probable lagoonal component, and brackish water elements. From the 115 molluscan taxa recognized, six have not been recognized to date in sediments later than the Cretaceous, and 30 represent from the Eocene or later records. The following new gastropod genera and subgenera are proposed: Texaficus, Crassauris, Latirus (Levarlatirus), Praesurcula, and Apiotoma (Lavarotoma). The following new species and subspecies are described: Bivalvia: Calorhadia diminutia, Adrana seguinensis, Bornia solomonis, Mactra (Eomactra) piscinasina, Arcopagia (Arcopagia) solomonis, A. (Johnsonella) seguinensis; Gastropoda: Turritella mortoni crassa, Tylotrochus extremus, Teinostoma (Idioraphie) seguinensis, Cochliolepis (Tylaxis) palaeocenica, Solariorbis velarum, Natica (Carinacca) seguinensis, Polinices (Euspira) perspecta texana, Texmelanatria contracta, T. brevis, Loxotrema texana, Pseudoliva globosa, Cantharus seguinensis, Colwellia humerosa, C. nodulina, C. nodulina meta, Tritiaria? seguinensis, Metula reticulata, Latirus (Levarlatirus) undus, L. (Levarlatirus) textilis, Strepsidura cancellata, Texaficus obesus, Levifusus pagoda seguinensis, L. actuocarinata, Fulgurofusus grande, Palaeorhaphis palaeocenica, Volutocorbis olssoni gracilis, Eoancilla hordea, Caveola ostium, Clinuropsis yanceyi, C. tuberculata, Praesurcula palaeocenica, Coronia vallare, Eopleurotoma molineuxae, Tropisurcula? (Eodrillia) cingula, Apiotoma (Lavarotoma) alva, Crassauris seguinensis, Pyramidella (Syrnola) bilineata, Turbonilla (Chemnitzia) obliqueata, Odostoma (Doliella) deprimere, Cylichna (Cylichnopsis) bicarinata, Mnestia ovata, Retusa (Cylichnina) bastropensis; Cephalopoda: Cimomia contraria, Angulithes? palaeocenica. Other changes in taxonomic assignment include: the genus Lisbonia is moved from the Nassariidae to the Buccinidae; the genus Palaeorhaphis is moved from the Mitridae to the Fasciolariidae; the genus Fictoacteon is made a subgenus of Eoacteon; Baluchicardia wilcoxensis replaces Venericardia wilcoxensis; Cochlodesma howei replaces Periploma howei; Pachymelania penrosei replaces Cerithium penrosei; Lisbonia pauper replaces Pseudoliva ostrarupis pauper; Pleuroploca plummeri replaces Fasciolaria? plummeri; Fulgurofusus perobliquus replaces aff. Falsifusus perobliquus; Eoancilla mediavia replaces Ancilla mediavia; Apiotoma (Lavarotoma) capex replaces "Pleurotoma" capex; the genus Ancillarina should be used in place of Ancilla for several U. S. and European Eocene species; the genus Coronia is discussed and several species of that genus in the U. S. Gulf Coast are reassigned to Gemmula; the genus Protosurcula is moved from the Borsoniinae to the Cochlespirinae. Neotypes are designated for Turritella polysticha and Pseudoliva ostrarupis.

385, Additions to the Molluscan Macrofauna of the Reklaw Formation (Eocene: Lower Claibornian) and Two New Taxa from the Middle Claibornian in Texas.
Abstract: Nineteen taxa new to the Reklaw Formation are recognized, 13 of them new; the new taxa are: Bivalvia: Modiolus marquezensis, Venericor densata newbyensis, Nemocardium angelinae, Kellia microstriatula, Katherinella plummeri, Cuspidaria textorama; Gastropoda: Atlanta funicularis, Phalium (Echinophoria) cingulae, Xenophora spiralis, Hemisurcula terus, Microdrillia infans reklawensis, Gemmula taylori quadrata, and Turbonilla (Chemnitzia) reklawensis. One bivalve taxon: Cuna sp., and four gastropod taxa are newly recognized from the Reklaw Formation: aff. Graciliala sp., Fulgurofusus perobliquus (Johnson, 1899), Fulgurofusus aff. rugatus (Aldrich, 1886), and Glyptotoma cf. crassiplicata (Gabb, 1860). One new subspecies of gastropod is proposed from the Cook Mountain Formation: Ectinochilus (Cowlitzia) texanum stephensoni, and one new species from the Weches Formation: Phalium (Semicassis) marcusi. In addition, Ectinochilus texanum (Harris, 1895) is placed under the subgenus Cowlitzia as Ectinochilus (Cowlitzia) texanum texanum.

386, New Eocene Mollusca from the Collections of the Texas Natural Science Center.
Abstract: Thirteen new taxa from the Eocene of Texas are described: Barbatia (Cucullaearca) kickapooensis, Cochlodesma unda, Pachychilus fulvus, Platyoptera cherokeensis, Paraseraphs texanopsis, Volutostrombus, V. eocenica, Cyrtochetus (Cyrtochetus) augustulus, Lacina alveata serpens, Oniscidia claibornensis, Caricella? turboides, Surculites venustus, and Scaphander (Mirascapha) smithvillensis. An updated composite section for the Claibornian Middle Eocene of Texas is given.

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http://www.museumoftheearth.org/publications/pubdetails.php?pubID=5768&back=authorlast%3Dgarvie%26subject%3D%26year%3D%26volume%3D%26isbn%3D%26search%3D1%26catID%3D50 

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Paula M. Mikkelsen, Ph.D.
Associate Director for Science
and Director of Publications
Paleontological Research Institution
1259 Trumansburg Road
Ithaca, NY 14850
Tel. (607) 273-6623, ext. 20
Fax (607) 273-6620
email  pmm37 at cornell.edu

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