PBDB Collection

USGS 6034-CO, Sulphur Well(s), New Watts Mill Rd., Little Hickman A section (Ordovician of the United States)

Where: Jessamine County, Kentucky (37.8° N, 84.6° W: paleocoordinates 27.5° S, 63.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Belodina compressa conodont zone, Tyrone Limestone Formation (High Bridge Group), Rocklandian (457.3 - 449.6 Ma)

• upper half of the Tyrone Limestone, "25 ft (8 m) below the Pencil Cave bentonite" [...] "112 ft above the base of section." (Frey, 1995)

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; intraclastic, peloidal, shelly/skeletal grainstone

• " 'The Tyrone Limestone accumulated in quiet shallow water and was periodically exposed to the air' (Cressman, 1973, p. 13). Cressman and Noger (1976) concluded that the Camp Nelson and Tyrone limestones (High Bridge Group) were deposited in tidal flat and immediate subtidal carbonate environments analogous to those seen today in the Bahamas and Florida Bay." (Hoare & Pojeta, 2006)

• "a hard, white to gray, crystalline fossiliferous limestone unit, 3 ft thick, [...] Petrographically, this limestone would be classified as a biopelsparrudite (classification of Folk, 1962) or a fossiliferous grainstone (classification of Dunham, 1962). The unit contains poorly sorted whole and fragmentaIy silicified shells of nautiloids, gastropods, solitary corals, trepostome bryozoans, and pelecypods, plus intraclasts consisting of sub rounded fragments of micrite, all in a matrix of sand-sized peloidal and skeletal grains." (Frey, 1995)

Size class: macrofossils

Preservation: recrystallized, replaced with silica

Reposited in the USNM

Collection methods: bulk, acetic,

• " [...] specimens were obtained from bulk rock collections (36,000 pounds (lbs) of limestone) made by USGS field parties in the 1960's and 1970's." (Frey, 1995). This statement not only applies to the Little Hickman locality. For further details on collection methods see p. P22 in the primary reference

Primary reference: R. C. Frey. 1995. Middle and Upper Ordovician nautiloid cephalopods of the Cincinnati Arch region of Kentucky, Indiana, and Ohio. U.S. Geological Survey Professional Paper 1066P:1-126 [S. Holland/S. Holland]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 87737: authorized by Björn Kröger, entered by Torsten Liebrecht on 23.03.2009, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• see comments on lithology;

•"The approximate number of identifiable gastropods is 2,500 specimens; however, they have not been studied systematically. Wagner (1990) examined the lophospirids, but he did not publish the results." (Hoare & Pojeta, 2006)

Show authors, comments, and common names

Deuteropoda
-	Ostracoda indet.¹ Ostracoda indet.¹ Latreille 1802 ostracod number of specimens not counted
Cephalopoda
Barrandeocerida - Plectoceratidae	Plectoceras cf. carletonense Plectoceras cf. carletonense Foerste 1933 USNM 158651 + additional fragmentary material
Endocerida - Endoceratidae	Vaginoceras sp. Vaginoceras sp. Hyatt 1884 "Vaginoceras sp. A"; USNM 158652, 158668, 468714, 468715 (suite of 4 specimens)
Oncocerida - Oncoceratidae	Laphamoceras cf. scofieldi, Maelonoceras cf. praematurum, Oncoceras major n. sp., Beloitoceras cf. huronense Laphamoceras cf. scofieldi Foerste 1932 USNM 158654, 158663, 158655, 158664, + four uncataloged specimens Maelonoceras cf. praematurum Billings 1860 USNM 158649, 468735 Oncoceras major n. sp. Frey 1995 USNM 158665 (type) Beloitoceras cf. huronense Billings 1865 USNM 158666, 468733, USNM 468729 (suite of specimens)
Actinocerida - Actinoceratidae	Actinoceras altopontense, Actinoceras kentuckiense Actinoceras altopontense Foerste and Teichert 1930 USNM 158640 to 158642, 158646, 158648 Actinoceras kentuckiense Foerste and Teichert 1930 USNM 158647, 158670, 158720
Actinocerida - Ormoceratidae	Ormoceras ferecentricum Ormoceras ferecentricum Foerste and Teichert 1930 USNM 158639, 468721
Orthocerida - Sactorthoceratidae	Murrayoceras cf. murrayi, Cartersoceras popei n. sp., Cartersoceras shideleri Murrayoceras cf. murrayi Billings 1857 USNM 158637, 468672-468675 Cartersoceras popei n. sp. Frey 1995 USNM 158624 (paratype),158625 (holotype), 158632, 468663, 468664 (all three are paratypes), 468665 (suite of 5 specimens) Cartersoceras shideleri Flower 1964 USNM 158627, 158631, 158633, 158635, 468656-468661, 468662 (suite of 14 specimens)
Orthocerida - Kionoceratidae	? Polygrammoceras sp. ? Polygrammoceras sp. Foerste 1927 "Polygrammoceras sp. B", USNM 468711
Orthocerida - Proteoceratidae	Monomuchites cf. costalis, Monomuchites obliquum n. sp., Monomuchites annularis n. sp., Proteoceras tyronensis Monomuchites cf. costalis Wilson 1961 USNM 158667, 158672, 468705, 468706 Monomuchites obliquum n. sp. Frey 1995 USNM 158643, 158648 (both are paratypes), 158653 (holotype) Monomuchites annularis n. sp. Frey 1995 USNM 158630, 158671 (paratypes), 158674 (holotype), 158675, 158676, 468716 (suite of specimens) Proteoceras tyronensis Foerste 1912 USNM 158629, 468686-468689, 468690 (suite of 10 specimens)
Orthocerida - Orthoceratidae	Pojetoceras floweri n. gen. n. sp. Pojetoceras floweri n. gen. n. sp. Frey 1995 USNM 468676 (holotype), 468677-468684 (all are paratypes), 468685 (suite of fragmentary specimens)
Gastropoda
Euomphalina - Holopeidae	Raphistomina lapicida³ Raphistomina lapicida³ Salter 1859 snail
Euomphalina - Helicotomidae	Helicotoma planulatoides³ Helicotoma planulatoides³ Ulrich and Scofield 1897 snail
Euomphalina - Raphistomatidae	Scalites peracutum³ Scalites peracutum³ Ulrich and Scofield 1897 snail
Bellerophontida - Pterothecidae	Pterotheca expansa⁴ Pterotheca expansa⁴ Emmons 1842 snail
Bellerophontida - Bucaniidae	Salpingostoma kentuckyense⁴ Salpingostoma kentuckyense⁴ Ulrich and Scofield 1897 snail
Murchisoniina - Lophospiridae	Eunema helicteres² Eunema helicteres² Salter 1859 snail
Murchisoniina - Trochonematidae	Trochonema canadensis², Trochonemella aff. notablis² Trochonema canadensis² Ulrich and Scofield 1897 snail Trochonemella aff. notablis² Ulrich and Scofield 1897 snail Trochonemella n. sp. A
Murchisoniina - Hormotomidae	Hormotoma gracilis² Hormotoma gracilis² Hall 1847 snail
Murchisoniina - Eotomariidae	Liospira decipens⁴ Liospira decipens⁴ Ulrich and Scofield 1897 snail
Polyplacophora
Paleoloricata - Mattheviidae	Spicuchelodes cressmani¹ Spicuchelodes cressmani¹ Hoare and Pojeta 2006 chiton USNM 523875–523882 (all are individual intermediate plates), 523888B (specimen comprises a total of 71 intermediate plates); all are paratypes
Septemchitonida - Alastegiidae	Amblytochiton incomptus n. sp.¹ Amblytochiton incomptus n. sp.¹ Hoare and Pojeta 2006 chiton 9 intermediate plates: USNM 523946, 523948-523955, 523957 (all are paratypes); 1 head plate: USNM 523947 (paratype); 1 tail plate: USNM 523956 (holotype)
Bivalvia
Myalinida - Ambonychiidae	Cleionychia sp.¹ Cleionychia sp.¹ Ulrich 1892 clam valves
Cyrtodontida - Cyrtodontidae	Cyrtodonta subovata¹, Vanuxemia gibbosa¹, Vanuxemia sp.¹ Cyrtodonta subovata¹ Ulrich 1894 clam valves Vanuxemia gibbosa¹ clam valves Vanuxemia sp.¹ Billings 1858 clam
Rhynchonellata
Pentamerida - Camerellidae	Camerella sp.¹ Camerella sp.¹ Billings 1859 "identified by R. B. Neumann", number of specimens not counted
Anthozoa
Stauriida - Lambelasmatidae	? Lambeophyllum sp.¹ ? Lambeophyllum sp.¹ Okulitch 1938 horn coral number of specimens not counted
Tetradium
-	Tetradium sp.¹ Tetradium sp.¹ Dana 1846 number of specimens not counted

¹Hoare and Pojeta 2006; ²Wagner 1990; ³Wagner 2023; ⁴Wahlman 1992