Project: New Fossils, Systematics, and Biogeography of the Oldest Known Crown Primate Teilhardina from the Earliest Eocene of Asia, Europe, and North America

About the project

Omomyiform primates are the most basal fossil haplorhines, with the oldest classified in the genus Teilhardina and known contemporaneously from Asia, Europe, and North America during the Paleocene-Eocene Thermal Maximum (PETM) ~56 mya. Characterization of morphology in this genus has been limited by small sample sizes and fragmentary fossils. A new dental sample (N=163) of the North American species Teilhardina brandti from PETM strata of the Bighorn Basin, Wyoming, documents previously unknown morphology and variation, prompting the need for a systematic revision of the genus. The P4 of T. brandti expresses a range of variation that encompasses that of the recently named, slightly younger North American species ‘Teilhardina gingerichi,’ which is here synonymized with T. brandti. A new partial dentary preserving the alveoli for P1-2 demonstrates that T. brandti variably expresses an unreduced, centrally-located P1, and in this regard is similar to that of T. asiatica from China. This observation, coupled with further documentation of variability in P1 alveolar size, position, and presence in the European type species T. belgica, indicates that the original diagnosis of T. asiatica is insufficient at distinguishing this species from either T. belgica or T. brandti. Likewise, the basal omomyiform ‘Archicebus achilles’ requires revision to be distinguished from Teilhardina. Results from a phylogenetic analysis of 1,890 characters scored for omomyiforms, adapiforms, and other euarchontan mammals produces a novel clade including T. magnoliana, T. brandti, T. asiatica, and T. belgica to the exclusion of two species previously referred to Teilhardina, which are here classified in a new genus (Bownomomys americanus and Bownomomys crassidens). While hypotheses of relationships and inferred biogeographic patterns among species of Teilhardina could change with the discovery of more complete fossils, the results of these analyses indicate a similar probability that the genus originated in either Asia or North America.

Members

Jonathan Bloch, Doug Boyer, Stephen Chester, Annelise Folie, Paul Morse, Thierry Smith

Data

38 published media groups owned by this project
38 published media groups associated with project specimens
38 project specimens
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DMNH:EPV:91331, Bownomomys americanus

Created 7/22/2018 at 15:49
Modified 7/23/2018 at 13:53
IRSNB:M:2299, Teilhardina belgica

Created 6/27/2018 at 10:41
Modified 6/27/2018 at 11:46
IRSNB:M:2310, Teilhardina belgica

Created 6/27/2018 at 10:43
Modified 7/25/2018 at 6:29
IRSNB:M:2311, Teilhardina belgica

Created 6/27/2018 at 10:45
Modified 7/25/2018 at 6:29
IRSNB:M:2312, Teilhardina belgica

Created 6/27/2018 at 10:49
Modified 7/25/2018 at 6:28
IRSNB:M:2313, Teilhardina belgica

Created 6/27/2018 at 10:54
Modified 7/25/2018 at 6:29
IRSNB:M:64, Teilhardina belgica

Created 6/27/2018 at 10:32
Modified 6/27/2018 at 12:31
IRSNB:M:65, Teilhardina belgica

Created 6/27/2018 at 10:36
Modified 6/27/2018 at 12:32
UF:UF:244452, Bownomomys americanus

Created 8/7/2018 at 21:29
Modified 8/7/2018 at 21:31
UF:UF:244454, Teilhardina brandti

Created 8/7/2018 at 21:32
Modified 8/7/2018 at 21:35
UF:UF:254929, Teilhardina brandti

Created 8/7/2018 at 21:36
Modified 8/7/2018 at 21:40
UF:UF:254932, Bownomomys americanus

Created 8/7/2018 at 21:40
Modified 8/7/2018 at 21:43
UF:UF:328631, Teilhardina brandti

Created 8/7/2018 at 21:57
Modified 8/7/2018 at 22:00
UF:UF:329254, Bownomomys americanus

Created 8/7/2018 at 22:00
Modified 8/7/2018 at 22:03
UF:UF:330818, Teilhardina brandti

Created 8/7/2018 at 22:04
Modified 8/7/2018 at 22:07
UF:UF:332758, Teilhardina brandti

Created 8/7/2018 at 22:08
Modified 8/7/2018 at 22:10
UF:UF:333700, Teilhardina brandti

Created 8/4/2018 at 15:29
Modified 8/7/2018 at 22:12
UF:UF:409265, Teilhardina brandti

Created 8/6/2018 at 12:44
Modified 8/7/2018 at 20:57
UF:UF:409284, Bownomomys americanus

Created 8/7/2018 at 21:04
Modified 8/7/2018 at 21:10
UF:UF:409293, Teilhardina brandti

Created 8/7/2018 at 21:11
Modified 8/7/2018 at 21:14
UF:UF:409296, Teilhardina brandti

Created 8/7/2018 at 21:15
Modified 8/7/2018 at 22:14
UF:UF:409313, Bownomomys americanus

Created 8/7/2018 at 21:19
Modified 8/7/2018 at 21:22
UF:UF:409316, Teilhardina brandti

Created 8/7/2018 at 21:22
Modified 8/7/2018 at 21:25
UM:65770, Bownomomys americanus

Created 7/22/2018 at 16:08
Modified 7/23/2018 at 14:28
UM:75610, Bownomomys americanus

Created 7/22/2018 at 16:09
Modified 7/23/2018 at 14:30
UM:76600, Bownomomys americanus

Created 7/22/2018 at 16:09
Modified 7/23/2018 at 14:31
USGS:25324, Bownomomys americanus

Created 7/22/2018 at 16:10
Modified 7/23/2018 at 14:32
USGS:3849, Bownomomys americanus

Created 6/27/2018 at 11:22
Modified 7/23/2018 at 14:33
USGS:512, Bownomomys crassidens

Created 6/27/2018 at 11:19
Modified 6/27/2018 at 12:41
USNM:PAL:493913, Teilhardina brandti

Created 7/22/2018 at 16:12
Modified 7/23/2018 at 14:41
USNM:PAL:525543, Teilhardina brandti

Created 7/22/2018 at 16:12
Modified 7/23/2018 at 14:42
USNM:PAL:525544, Teilhardina brandti

Created 7/22/2018 at 16:12
Modified 7/23/2018 at 14:43
USNM:PAL:533554, Teilhardina brandti

Created 7/22/2018 at 16:13
Modified 7/23/2018 at 14:44
UW:6896, Bownomomys americanus

Created 6/27/2018 at 11:23
Modified 7/21/2018 at 11:37
UW:7142, Bownomomys americanus

Created 7/22/2018 at 16:13
Modified 7/23/2018 at 14:47
UW:7165, Bownomomys americanus

Created 7/22/2018 at 16:15
Modified 7/23/2018 at 14:47
UW:7170, Bownomomys americanus

Created 7/22/2018 at 16:15
Modified 7/23/2018 at 14:48
UW:8959, Bownomomys crassidens

Created 6/27/2018 at 11:25
Modified 7/21/2018 at 11:38