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The correct citation is: Timetracks 8(4): p.4Â NOT 5(4); this put it around 1989.
âGenus: [To be described from the Upper Triassic of New Mexico: a new kind of "thecodont similar to a small dinosaur"; cf. New Mexico Museum of Natural History publication Timetracks 8(4): p.4]â
On April 23, 2021 at 9:13 PM John Schneiderman <john-schneiderman@cox.net> wrote:
Reference:
Hunt, A. P.; and Lucas; S. G. (1989). "Late Triassic vertebrate localities in New Mexico". In Lucas, S. G.; Hunt, A. P. (eds.). Dawn of the Age of Dinosaurs in the American Southwest. Albuquerque, New Mexico: New Mexico Museum of Natural History. p.72-101
(1) ÂÂÂÂÂÂÂÂ Locality: Barranca Creek, New Mexico Â(Secs. 6-7, T 10N, R33 E: secs. 1-2, T10N, R32E; sec. 31, T11N, R33E)
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ ownership is private
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ Horizon: Bull Canyon Formation.
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ Age: Late Triassic, Norian (Revueltian faunal age)
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ Material: Vertebrae, pelvic fragments and a jaw fragment.
Â(2)ÂÂÂÂÂÂÂÂ Locality: Revuelto Creek, Quay County, New Mexico (Secs. 9-10, 14-16 and 21-22, T10N, R33E)
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ Horizon: Bull Canyon Formation.
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ Age: Late Triassic, Norian (Revueltian faunal age)
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ Material: 2 post skeletons and postcranina.
On April 23, 2021 at 1:29 PM Mickey Mortimer <mickey_mortimer111@msn.com> wrote:
Hmm. Have a copy of that reference to send over?
Mickey
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From: John Schneiderman <john-schneiderman@cox.net>
Sent: Thursday, April 22, 2021 8:46 PM
To: Mickey Mortimer <mickey_mortimer111@msn.com>; DML <dinosaur-l@usc.edu>
Subject: Re: [dinosaur] Mystery New Mexico lagerpetid in TimetracksÂMy guess is:Â cf.ÂHesperosuchusÂagilis
Reference:ÂHUNT & LUCAS, 1989.Â
On April 22, 2021 at 5:53 PM Mickey Mortimer <mickey_mortimer111@msn.com> wrote:
Hi everyone. Olshevsky (1991) lists the following entry under Lagerpetonidae-
"Genus: [To be described from the Upper Triassic of New Mexico: a new kind of "thecodont similar to a small dinosaur"; cf. New Mexico Museum of Natural History publication Timetracks 5(4): p.4]"
Does anyone know what it could be? Timetracks volume 11 was from 1991, and 15 was from 1994, so this is from around 1985. Chindesaurus is an obvious possibility, but that has its own entry on the same page under Staurikosauridae. The Hayden Quarry that Dromomeron romeri is from wasn't opened until 2006. Effigia wasn't studied until 2004 although it was sitting unrecognized in the AMNH for decades. Juvenile Postosuchus CM-73372 wasn't found until 1988-1989. There are no significant Poposaurus or Shuvosaurus remains from the state. Maybe Eucoelophysis, which was found in 1983? Although everything I've read says that that was thought to be a theropod until decades later...
Reference- Olshevsky, 1991. A revision of the parainfraclass Archosauria Cope, 1869, excluding the advanced Crocodylia. Mesozoic Meanderings. 2, 196 pp.
Mickey Mortimer
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