†Omomys (Omomyidae)
Omomys ist eine Primatengattung innerhalb der Familie Omomyidae, deren 5 Mitglieder ab dem frühen Paläogen (Eozän) im Ypresium lebten, das vor ungefähr 56 Millionen Jahren begann und bis vor 47,8 Millionen Jahren andauerte. Viele Überreste wurden in Vereinigte Staaten von Amerika (USA) gefunden.
Omomys ist der Gattungsname zweier ausgestorbener Primatenarten aus der Familie Omomyidae (Tribus Omomyini innerhalb der Unterfamilie Omomyinae), die im Eozän in Nordamerika verbreitet waren.
Omomys war eine kleine Insekten oder Früchte fressende Primatengattung, die sich vierbeinig in den Bäumen fortbewegte, aber nach seinem Bewegungsapparat zu urteilen, auch in der Lage war zu springen. Forscher interpretieren die Überreste von Omomys mehr einem generalisierten Cheirogaleiden ähnlich als einem Tarsier.
Omomys carteri
Das Typusexemplar mit der Bezeichnung A.N.S. No. 10335 ist ein rechter Unterkieferast (Ramus) mit zwei Prämolaren (P3-4) und einem Molaren (M2). Basierend auf der Größe und Morphologie der Zähne schätzt man das Körpergewicht des kleinen Primaten auf 410,3 Gramm. Es lassen sich auch Rückschlüsse auf die Lebensweise (Ökologie) ziehen: Omomys carteri war ein baumlebender Insektenfresser.
Sammlung | Epoche, Alter | Geologie, Formation |
---|---|---|
Big Island-Blue Rim Badlands (UM BI-7) | Bridger | |
Physiologie | |
---|---|
Gewicht: | ? |
Schwestertaxa | |
Omomys lloydi
Das Typusexemplar mit der Bezeichnung C.M. No. 6417 ist ein linker Unterkieferast mit Prämolaren und Molaren (P4-M2). Der Fund stammt aus dem Douglas Creek Member der Green River Formation (Uintah County, Utah) und ist zwischen 50,3 und 46,2 Millionen Jahre alt.
Sammlung | Kommentar zum Fundort | Epoche, Alter | Geologie, Formation | Kommentar zur Sammlung |
---|---|---|---|---|
Powder Wash (Upper) | Green River | Powder Springs | ||
Lithographie | Kommentar z. Taxonomie | |||
"a uniformly muddy, fine-grained sublitharenite" (Gunnell and Bartels 1999) | sec 8 T 7S R 25E: Van Houten 1945 same as the "Green River" fauna of Burke 1935 and Kay 1957 according to Remy 1992 there is an Ar-Ar date of 47.2 Ma on the "curly tuff... between the S1 marker unit and the Magohany oil shale bed" (S1 unit is lower); because the fauna is from "82 m below" the shale and the date is interpreted by Remy as Uintan, I assume it is too young for use as a calibration point "Class 1" reliability K-Ar date of 44.8 (= 46.0) +/- 0.9 Ma (Mauger 1977) for the Wavy Tuff is definitely too young for use as the tuff is 20 ft above the Mahogany Oil Shale; Wavy Tuff redated at 42.3 +/- 2.0 (FT on zircon) by Bryant et al. 1989 original list repeated almost without modification by Gunnell and Bartels 1999 Black and Sutton list the following: Thisbemys corrugatus "Leptotomus bridgerensis" falls in the Parachute Creek Mbr. sensu Roehloer 1992 early Bridgerian the record of Apatemys hendryi reported by Robinson 1966b is omitted without comment by K & S |
Literatur
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