Thomas Farm (Miocene of the United States)

Where: Gilchrist County, Florida (29.7° N, 82.6° W: paleocoordinates 30.0° N, 78.9° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Alachua Formation, Hemingfordian (20.4 - 16.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: terrestrial; calcareous sandstone and blue claystone

• fossils are from multiple horizons including a "joint clay"; a "layer of clayballs"; a "lime sand"; a bed of limestone "boulders" with "gravel and lime sand" matrix; and a "laminated bluish clay"; most of the material is from the "lime sand"

Size classes: macrofossils, mesofossils

Collected by C. Simpson, T. Barbour. P. Brodkorb in (Simpson), 1938 - 1942 (MCZ), 1959 (Brodkorb); reposited in the FLMNH, MCZ

Collection methods: bulk, quarrying, sieve,

Primary reference: T. E. White. 1942. The Lower Miocene mammal fauna of Florida. Bulletin of the Museum of Comparative Zoology 92(1):1-49 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 18597: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by John Hunter, Jason Head, Matthew Carrano, Brian Beatty, Richard Hulbert and Terri Cleary

Creative Commons license: CC BY (attribution)

Taxonomic list

• six fossiliferous levels, but no detectable faunal turnover: Pratt 1990
NISP 2445, based on Pratt 1990, but this excludes small mammals (NISP 82+) and includes 250 specimens that may be specifically indeterminate; total about 2527; Pratt and Morgan 1989 report 81 specimens of two species for which Black 1963a reported 5, hence his 105 specimens in three other species may now be represented by about 1700, for a rough total of 1783 small mammals and 4310 overall
 Salientia - Pelobatidae
"Scaphiopus cf. holbrooki" = Scaphiopus (Scaphiopus) holbrooki2
"Scaphiopus cf. holbrooki" = Scaphiopus (Scaphiopus) holbrooki2 Harlan 1835 Eastern spadefoot toad
 Salientia - Ranidae
Rana sp.2 Linnaeus 1758 frog
 Salientia - Microhylidae
Microhyla sp.2 Tschudi 1838 frog
 Salientia - Hylidae
Hyla goini n. sp.2, Proacris mintoni n. gen. n. sp.12
Hyla goini n. sp.2 Auffenberg 1956 tree frog
Proacris mintoni n. gen. n. sp.12 Holman 1961 tree frog
 Salientia - Bufonidae
Bufo praevius25 Tihen 1951 toad
 Caudata - Urodela
Siren hesterna n. sp.10
Siren hesterna n. sp.10 Goin and Auffenberg 1955 siren
 Testudines - Pantestudinidae
Testudo tedwhitei n. sp.31 Williams 1953 turtle
 Testudines - Panemydidae
Pseudemys sp.31 Gray 1856 cooter
compared to P. floridana group
 Charadriiformes - Rhegminornithidae
Rhegminornis calobates n. sp.20 Wetmore 1943 shorebird
 Galliformes - Cracidae
Boreortalis laesslei n. gen. n. sp.6
Boreortalis laesslei n. gen. n. sp.6 Brodkorb 1954 chachalaca
 Cuculiformes - Cuculidae
Cuculidae indet.23 Leach 1820 cuckoo
Thomasococcyx philohippus n. gen. n. sp.23 Steadman 2008 cuckoo
 Accipitriformes - Accipitridae
Promilio brodkorbi n. sp.27, "Proictinia floridana n. sp." = Promilio floridanus7, Promilio epileus n. sp.27
Promilio brodkorbi n. sp.27 Wetmore 1958 hawk
Brodkorb Coll. 1775
"Proictinia floridana n. sp." = Promilio floridanus7 Brodkorb 1956 hawk
Promilio epileus n. sp.27 Wetmore 1958 hawk
MCZ 2719
 Suliformes - Anhingidae
"Phalacrocorax subvolans n. sp." = Anhinga subvolans7
"Phalacrocorax subvolans n. sp." = Anhinga subvolans7 Brodkorb 1956 darter
 Crocodylia - Alligatoridae
Alligator olseni n. sp.29 White 1942 alligator
MCZ 1887 - type (skull)
 Squamata -
Peltosaurus floridanus n. sp.26 Vanzolini 1952 squamates
 Squamata - Aniliidae
Anilioides minuatus n. gen. n. sp.3
Anilioides minuatus n. gen. n. sp.3 Auffenberg 1963 pipe snake
 Squamata - Loxocemidae
Ogmophis pauperrimus n. sp.26 Vanzolini 1952 Mexican burrowing snake
 Squamata - Boidae
"Neurodromicus stanolseni n. sp." = Boa constrictor26, "Neurodromicus barbouri n. sp." = Boa constrictor26, Calamagras floridanus n. sp.3, Pterygoboa sp.16
"Neurodromicus stanolseni n. sp." = Boa constrictor26 Linnaeus 1758 boa
"Neurodromicus barbouri n. sp." = Boa constrictor26 Linnaeus 1758 boa
Calamagras floridanus n. sp.3 Auffenberg 1963 dwarf boa
Pterygoboa sp.16 Holman 1976 sand boa
 Squamata - Colubridae
Pseudocemophora antiqua n. gen. n. sp.3, Paraoxybelis floridanus n. gen. n. sp.3
Pseudocemophora antiqua n. gen. n. sp.3 colubrid snake
Paraoxybelis floridanus n. gen. n. sp.3 colubrid snake
 Squamata -
Scolecophidia indet.15 snake
UF 268700-01, 271962-67, 12 trunk vertebrae
 Squamata - Gekkonidae
sensu lato Gekkonidae indet.9 Gray 1825 gecko
MCZ 3382, a right dentary
 Rodentia -
cf. Texomys sp.4 Slaughter 1981 rodent
 Rodentia - Sciuridae
Petauristodon pattersoni22 Pratt and Morgan 1989 squirrel
includes "Prosciurus? sp." of Black 1963a (1 specimen)
cf. Miospermophilus sp.22 Black 1963 squirrel
Nototamias hulberti22 Pratt and Morgan 1989 squirrel
(Black 1963a lists 4)
 Rodentia - Heteromyidae
Harrymys magnus1 Wood 1932 rodent
Proheteromys floridanus19 Wood 1932 rodent
Black 1963a
 Rodentia - Mylagaulidae
Mylagaulidae indet.1 Cope 1881 rodent
 Perissodactyla - Rhinocerotidae
Menoceras barbouri32 Wood 1964 rhinoceros
Floridaceras whitei32 Wood 1964 rhinoceros
"Rhinocerotidae, Gen. et. sp. nov."
 Perissodactyla - Equidae
Parahippus leonensis Sellards 1916 anchitheriine horse
includes "P. barbouri" type of White 1942, and apparently "Merychippus gunteri" of White 1942
Anchitherium clarencei Simpson 1932 anchitheriine horse
may include "Miohippus sp." of White 1942
Archaeohippus blackbergi1 Hay 1924 anchitheriine horse
 Tribosphenida - Soricidae
Limnoecus sp.18 Stirton 1930 shrew
said to be a new species; NISP not clear; "Soricidae indet."
 Chiroptera -
Chiroptera indet.19 Blumenbach 1779 bat
several species of bats
 Chiroptera - Vespertilionidae
Miomyotis floridanus n. gen. n. sp.14, Karstala silva n. gen. n. sp.8, Suaptenos whitei n. gen. n. sp.14
Miomyotis floridanus n. gen. n. sp.14 Lawrence 1943 vesper bat
Karstala silva n. gen. n. sp.8 Czaplewski and Morgan 2001 vesper bat
vespertilionid bat
Suaptenos whitei n. gen. n. sp.14 Lawrence 1943 vesper bat
 Chiroptera - Natalidae
Primonatalus prattae n. gen. n. sp.17
Primonatalus prattae n. gen. n. sp.17 Morgan and Czaplewski 2003 funnel-eared bat
natalid bat
 Carnivora - Ursidae
Phoberocyon johnhenryi1 White 1947 bear
 Carnivora - Amphicyonidae
Amphicyon longiramus n. sp. White 1942 bear-dog
includes "A. intermedius" type of White 1940
Cynelos caroniavorus24 White 1942 bear-dog
includes type of "Parictis bathygenus" of White 1947
 Carnivora - Mustelidae
Oligobunis floridanus n. sp.30 White 1947 mustelid carnivore
Zodiolestes freundi n. sp.13 Labs Hochstein 2007 mustelid carnivore
Leptarctus ancipidens19 White 1941 mustelid carnivore
Mustelinae indet.24 Fischer 1817 mustelid carnivore
 Carnivora - Canidae
Osbornodon iamonensis1 Sellards 1916 canid
includes "P. nobilis" of White 1942
Metatomarctus canavus1 Simpson 1932 bone-crushing dog
includes "T. thomasi" type of White 1941 and "Nothocyon insularis" type of White 1942
Euoplocyon spissidens1 White 1947 bone-crushing dog
Phlaocyon sp.11 Matthew 1899 bone-crushing dog
new material
 Ungulata - Merycoidodontidae
Merycoidodon sp.21 Leidy 1848 oreodont
"cf. Merychyus" of Maglio 1966, MacFadden 1982
 Ungulata - Tayassuidae
Floridachoerus olseni n. sp.28 White 1941 peccary
 Ungulata - Camelidae
Nothokemas floridanus30 Simpson 1932 camel
see Simpson 1932; includes "Paratylopus grandis" type of White 1940
Floridatragulus dolichanthereus n. sp. White 1940 camel
includes "Hypermekops olseni" type of White 1942 and "F. barbouri" type of White 1947; see also Patton 1967
 Ungulata - Protoceratidae
Prosynthetoceras texanus1 Hay 1924 protoceratid
presumably includes "Synthetoceras douglasi" type of White 1947
 Ungulata - Palaeomerycidae
Diabolocornis simonsi5 Beatty 2010 ruminant
UF 216543 (holotype)
 Ungulata - Moschidae
Machaeromeryx gilchristensis n. sp. White 1941 musk deer
Parablastomeryx floridanus n. sp. White 1940 musk deer