Search the Community
Showing results for tags 'big snowy group'.
-
Taxonomy from Lund 2000. Diagnosis for the genus Discoserra from Lund 2000, p. 180: "Teeth of the premaxilla, maxilla and dentary long, thin, and styliform. Posterior end of maxilla does not extend back to level of anterior margin of orbit. Parietals excluded from contact in dorsal midline by postrostral 2, which contacts supraoccipital. No transverse supratemporal commissure in supraoccipital. Two rows of paired bones over orbit. One to three interopercular bones; two to three small postspiraculars and a presupracleithrum. Branchiostegals very variable in size, number and shape. Dorsal ridge scales with small, forwardly facing hooks; two to three small anal fin hooks. Origin of anterior edge of dorsal fin set well below dorsal margin of ridge scales. All fins with well spaced rays; pelvic fin reduced, caudal fin rounded." Line drawing from Lund 2000, p. 183: Identified by oilshale using Lund 2000. References: R. Lund (2000) The new Actinopterygian order Guildayichthyiformes from the Lower Carboniferous of Montana (USA). Geodiversitas 22(2):171-206
-
- 3
-
- tff-oilshale-ch2341
- discoserra
- (and 6 more)
-
This is a plate of Productus brachiopods with spines collected from marine sedimentary brown-red clay shale, which sits on a bed of breccia limestone. Location is slope above rest-stop on east side of Highway 89 N about two miles north of Riceville Rd. in central Montana. Was collected on Jan 21,2019. Prep work was done by collector David C. Powers.
-
- mermarican
- kibbey formation
- (and 5 more)
-
This fish belongs to the Tarrasiids, a group of extinct bony fish with elongated body and a diphycercal caudal fin that was continuous with the dorsal and anal fins. The continuous dorsal-caudal-anal fin is well webbed between the fin rays. Fish with this fin disposition today are slow weak swimmers that move either forward or backward, by body undulation, median fin undulation or pectoral paddling. Fish such as these are shelter dwellers in geometrically complex shallow water environments, such as weed or sponge beds. No valid description seems to exist. For Apholidotos ossna Lund, the reference given is "in Frickhinger, 1991". Another name - Apholidotus ossuosus Lund - is used by UMPC (University of Montana Paleontology Center) in their catalog. In his own much later publications (e.g. in 1999), Lund himself in not using any of these combinations, he is only using the nickname "Garden Eel".
-
- carboniferous
- apholidotus
- (and 8 more)