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Calymenid and Other Ordovician Trilobites from Kentucky and Ohio

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Calymenid and Other Ordovician Trilobites from Kentucky and Ohio UBRARY COPY Calymenid and Other Ordovician Trilobites from Kentucky and Ohio GEOLOGICAL SURVEY PROFESSIONAL PAPER 583-B Prepared in cooperation with the Kentucky Geological Survey Calymenid and Other Ordovician Trilobites from Kentucky and Ohio By .REUBEN JAMES ROSS, JR. CONTRIBUTIONS TO THE ORDOVICIAN PALEONTOLOGY OF KENTUCKY GEOLOGICAL SURVEY PROFESSIONAL PAPER 583-B Prepared in cooperation with the Kentucky Geological Survey Species of the trilobites Isotelus, Bathyurus?, Proetidella, Gravicalymene, Flexicalymene, and Acidaspis are described from Middle and Upper Ordovician strata of Kentucky UNITED -STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1967 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY William T .. Pecora, Director For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 - Price 45 cents (paper cover) CONTENTS Page Systematic paleontology-Continued Page B1 B6 IntroductionAbskact---~-------------~------------------------- ______________________________________ _ Proetidae---~---------------------------------- 1 Proetidella ________________________________ _ Calymenidae __________________________________ _ 6 Acknowledgments ______________ -~ __ -~ ___________ ·___ _ 1 7 Gravicalymene _____________________________ _ Localities_-~ ___ . _______ ~ ___ . _____ -- _____ - ~- _-- __ --- 2 8 Systematic paleontology ______________ -.- ____________ _ 3 Flexicalymene ______________________________ _ 13 Asaphidae ____________________________________ _ 3 Odontopleuridae __________________ ----- ________ _ 17 I sotelus _________ ----- _- _----------- . ----- . - 3 Acidaspis _________________________________ _ 17 Bathyuridae-----------------~-------------~--- 6 Fteferences----------------------------------------­ 18 Bathyurus? sp ____________ -- . - _- _--- ___ - _--- 6 IndeX--------------------------------------------- 19 ILLUSTRATIONS [Plates follow index] PLATE 1. Isoletus. 2. Isotelus, Bathyurus?, Proetidella, and Gravicalymene. 3. Gravicalymene and Flexicalymene. 4. Flexicalymene and Gravicalymene. 5. Flexicalymene and Acidaspis. Page FIGURE 1. Index map showing location of stratigraphic sections from which trilobites were obtained-------------------------------------------------- B2 2. Stratigraphic sections from which Middle Ordovician trilobites have been collected------------------------------------------------------- 4 3. Isotelus gigas Dekay. Cranidium____________________________________ 6 III CONTRIBUTIONS TO THE ORDOVICIAN PALEONTOLOGY OF KENTUCKY CAL YMENID AND OTHER ORDOVICIAN TRILOBITES FROM KENTUCKY AND OHIO By REUBEN JAMES Ross, Jr. ABSTRACT York that are deposited in the U.S. National Museum, Specimens of the trilobite genera Isotelus, Bathyu,nts, Pro­ the New York State Museum, and the American otidella, Fle:cicalymone, Gravicalymene, and A.vidaspis were ob­ Museum of Natural History. tained from Middle and Upper Ordovician rocks of Kentucky. I discovered that most of those collections, plus other For uncertain reasons F. senaria was not collected from strata collections from Michigan, include one or two species of of Trenton age in Kentucky. Examination of topotype material from the Trenton Limestone of Trenton Falls, N.Y., proves that Gravicalymene, as well as specimens that probably are many specimens labeled F. senaria actually belong to Gravicaly­ F. senaria. Several of these .specimens are illustrated mene. A new species of Gravicalymene and one of Fle:cicaly­ on plate 2, figure 23; plate 3, figures 18, 19, 22, 23, and mene are described in this report, and a neotype of F. senaria plate 4, figures 1-13. (Conrad) is designated. Some of the questions arising from the calymenid INTRODUCTION phase of this study to date are : 1. Is the seeming absence of Flewicalymene from the Despite the small number of trilobites collected to Lexington Limestone real~ date from d~e Ordovician rocks of Kentucky, important 2. What is the detailed stratigraphic distribution of questions concerning stratigraphic ranges and taxonomy species of Flewicalymene and of Gravicalynwne have been raised in the course of this study. The limited within the type section ·of the Trenton Limestone samples include specimens of Isotelus, Bathyu'l'US, of New York and within the Ordovician rocks of Proetid~lla, Flewicalyn~ene, Gravicalymene, and Michigan~ .A.cidaspis, and were obtained mainly from Middle 3. Is there any geographic control over distribution of Ordovician fonnations. Flewicalyrnwne that is different from that over dis­ Because collecting was undertaken in conjunction tribution of Gravicalyrnwne ~ with detailed stratigraphic study by other members of Answers to these questions and to others about other the U.S. Geological Survey and by members of the kinds of Ordovician trilobites must be sought in the l(entucky Geological Survey, large numbers of fossils future. This report will call attention to a few of the have been obtained from Ordovician rocks with good taxonomic and stratigraphic problems that need lithostratigraphic control. Main effort was directed to­ resolution. ward obtaining brachiopods, bryozoans, and conodonts ACKNOWLEDGMENTS in the belief thrut they would have the greatest practical zonal value in interpreting regional stratigraphy: Ac­ John Pojeta made available excellently preserved cordingly, other groups of fossils are less well repre­ . specimens of Flewicalymene meeki (Foerste) from the sented in the collections. rocks of Maysville age in the vicinity of Cincinnati, and . Many unresolved problems have arisen as a result of G. W. Weir collected equally fine examples .of F. re­ this study. For instance, Gravicalymene is the only caly­ tr,m·sa (Foerste) from the type section of Foerste's so­ menid genus obtained from the Lexington Limestone, called Arnheim Formation. I have been assisted in other a. formation of probable Trenton age. In the collections collecting by E. R~ Cressman, D. F. B. Black, Ellis from the Lexington, I had expected to find Flewicaly­ Yochelson, R. B. Neuman, Olgarts l{arklins, and F. A. n~ene senaria (Conrad), a venerated guide to strata of Schilling. Dr. D. W. Fisher and C. F.lGlfoyle provided Trenton age. Fa.ilure to find i't in l{entucky collections specimens of Flewicalymene from the New York State led to a check of collections purported to contain Museum. F. J. Collier lent specimens of the same genus F. senaria from the type Trenton Limestone of New from the U.S. National Museum. Dr. E. C. Stumm Bl B2 CONTRIBUTIONS TO THE ORDOVICIAN PALEONTOLOGY OF KENTUCKY arranged the loan of types of three calymenid species shown in figure 1. Terminology of Ordovician lithologic from Michigan. Specimens of Flexicalymene, one of stratigraphic units in this area has been revised recently which is here designated as neotype of Flexicaylmene by Weir and Greene ( 1965) and by Black, Cressman, senaria, were lent by Dr. Roger Batten from the Amer­ and MacQuown ( 1965), and the reader will find ican Museum of Natural History. An unsuccessful familiarization with these two papers helpful in under­ search for Conrad's type specimen of F. senaria was standing the stratigraphic position of the described made by Dr. Horace Richards in the collections of the fossils. Philadelphia Academy of Sciences. Specimens were A stratigraphic study and compilation using all the mounted and photographed by L. A. Wilson. paleontologic information obtained so far· is in prepara­ tion by E. R. Cressman and will include, among others, LOCALITIES the sections involved here. These sections are: The described trilobites were collected from six strati­ Section 22B (Clays Ferry Supplementary). (See Weir and graphic sections in central Kentucky, from one section Greene, 1965, tables 1, 2.) Measured along old Clays Ferry in northern Kentucky, and at two localities in Ohio. Road, beginning about 750ft west of bridge piers for Interstate Relative positions of these sections and localities are Highway 75 to hairpin turn and uphill to barn at altitude 965 ··~ ft. Kentucky coord., south zone: E. 2,407·,000 ft. N. 566, 600ft, Ford quad., Kentucky. Section 180 (Antioch Church). Along road from Antioch 85° 84° Church to Trinity Church, northwest of Kentucky River. Ken­ tucky coord., south ·zone: E. 2,361,200 ft, N. 532,200 ft, Valley View quad., Kentucky. On USGS Map GQ-470 (Greene, 1966) this section is located along west edge at lat 37°47'30". Section 32 (West Marble Creek). Measured for about 4,000 ft above mouth of creek on· northeast side of Kentucky River. Arnheim 301 Kentucky coord., south zone: E. 2,370,000 ft, N. 554,800 ft, Valley 0 View quad., Kentucky. Fossil collections indicated by R-CC on USGS Map GQ-470 (Greene, 1966). -J Section 30B (Perryville South). In old quarry 0.4 mile south of Perryville. Kentucky coord., south zone: E. 2,222,200 ft, N. 478,550 ft, Perryville quad., Kentucky. Section 88 (Frankfort West). Along eastbound lane of Inter­ state Highway 64, west of Kentucky River. Kentucky coord., north zone: E. 1,814,900 ft, N. 240,000 ft, Frankfort West quad., KENTUCKY Kentucky. Section 61 (Switzer A). Along Kentucky Highway 35, just south of Elkhorn Creek. Kentucky coord., north zone: E. 1,829,- 670 ft, N. 290,800 ft, Switzer quad., Kentucky. To facilitate an understanding of the stratigraphic positions of the described trilobites, a simplified fence diagram is included as figure 2. Inferred correlations 88 are based on incomplete evidence; when studies of other kinds of fossils have been completed, adjustments can 38°~--L-~-----------.---.-------+~--------1
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