†Plesiolestes nacimienti (Palaechthonidae)
Plesiolestes nacimienti ist eine Primatenart innerhalb der Familie Palaechthonidae, die ab dem Paläogen (Paläozän) im Danium lebte, das vor rund 66 Millionen Jahren begann und bis vor 61,6 Millionen Jahren andauerte.
Daten zu den einzelnen Funden von Plesiolestes nacimienti
| Sammlung | Kommentar zum Fundort | Epoche, Alter | Geologie, Formation | Kommentar zur Sammlung |
|---|---|---|---|---|
| Big Pocket | NW 1/4 sec 14 T27N R11W, Kutz Canyon "Almost all the material was recovered from approximately 100 linear yards of outcrop" (Wilson 1951) | Danian zwischen 61.7 und 63.3 Millionen Jahren |
Nacimiento | Angels Peak; KUVP Loc. 13; Locality NM 13; NMMNH 2635; UALP 7435, 7436, 75144; NMMNH locality L-2635 |
| Kommentar z. Stratigraphie | Lithographie | Kommentar z. Taxonomie | ||
| from "a zone... three to four feet in thickness... The actual bone layer, not as yet located, may prove to be thinner than this" (Wilson 1951) not far below the middle of a reversed magnetic polarity zone in the Kutz Canyon section interpreted as C27r based on the position of the K-T boundary in the correlative Barrel Spring Arroyo = De-na-zin Wash section: see Butler et al. 1977, Lucas et al. 1997 | "reddish silt" (Wilson 1951) | UALP localities are at exactly the same level as KUVP 13 but may be at some distance following taxa listed by Williamson and Lucas may be from Big Pocket or a stratigraphically nearby locality: ? Peradectes sp. "D" Pentacodon inversus Protictis haydenianus "Protictis" sp. "A" Protictis (Protictis) sp. "B" Triisodon quivirensis Ellipsodon inaequidens | ||
| U.a. am Fundort ausgegraben: | Palaechthon torrejonius | |||
| Sammlung | Kommentar zum Fundort | Epoche, Alter | Geologie, Formation | Kommentar zur Sammlung |
|---|---|---|---|---|
| Dragon Canyon | "western half of section 8, T. 19 S., R. 6 E." according to Gazin 1939 coordinate based on township and range | Danian zwischen 61.7 und 63.3 Millionen Jahren |
North Horn | Gazin's Locality 2; OMNH V799; UALP 76111, 76112, 7776 |
| Kommentar z. Stratigraphie | Kommentar z. Taxonomie | |||
| close to the top of a normal magnetic polarity zone interpreted as C28n, but there is no tie point in the section: see Lucas et al. 1997 | firmly correlated with Wagonroad Upper Horizon, which was included in the list of Tomida and Butler 1980; paleomagnetic data strongly support a correlation between the two horizons descriptions of Robison 1986 do not incorporate the collections reported by Tomida and Butler and Tomida 1982 "Oxyclaenus pearcei" is not discussed by Robison 1986 and I assume it is only present at Wagonroad Upper Horizon Haploconus "inopinatus" is not discussed by Robison 1986 and I assume it is only present at Wagonroad Upper Horizon |
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| U.a. am Fundort ausgegraben: | Draconodus apertus | |||
| Sammlung | Kommentar zum Fundort | Epoche, Alter | Geologie, Formation | Kommentar zur Sammlung |
|---|---|---|---|---|
| Tom's Top (Dawson Creek) | Big Bend National Park, "near Dawson Creek" (basis of coordinate) according to Lofgren et al. 2005 | Danian zwischen 61.7 und 63.3 Millionen Jahren |
Black Peaks | LSUMG 11; LSUMG V-111; TMM 41400 |
| Kommentar z. Stratigraphie | Museum | Kommentar z. Taxonomie | ||
| said to be late Puercan based on undescribed species, but Torrejonian by Williamson 1996 at 160 m level of Mbr., but position relative to Dogie Mountain unclear; most recently, Leslie et al. (2018) have demonstrated a Torrejonian age | TMM | the two LSUMG locality numbers appear to refer to the same locality two of "three new mammalian taxa" are discussed by Williamson 1996, but not the third |
Literatur
G. F. Gunnell 1989, Evolutionary History of Microsyopoidea (Mammalia, ?Primates) and the Relationship Between Plesiadapiformes and Primates. University of Michigan Papers on Paleontology. 27, p. 1 - 157J. Alroy 2002, Synonymies and reidentifications of North American fossil mammals. . , p. - 157