Mcqueenoceras is an extinct genus of early endocerid, a nautiloid from the Floian epoch of the late early Ordovician period. It was similar in overall form to Clitendoceras, from which it may have been derived. Mcqueenoceras, like Clitendoceras, has ventral siphuncle but the endocones are thicker on the ventral side and thinner on the dorsal. Also the sutures in Mcqueenoceras retreat rearward, forming lobes as they cross the venter. The type species is Mcqueenoceras jeffersonense, named by E.O. Ulrich and A.F. Foerste in 1935, and it is known from Missouri and New York.[1] In 1956, Rousseau H. Flower named two other species, M. cariniferum and M. ventrale, both known from Maryland.[2][3]
| Mcqueenoceras Temporal range:
| |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | †Endocerida |
| Family: | †Proterocameroceratidae |
| Genus: | †Mcqueenoceras Ulrich & Foerste, 1935 |
| Type species | |
| Mcqueenoceras jeffersonense Ulrich & Foerste, 1935
| |
| Other species | |
| |
References
edit- ^ Kroger, B.; Landing, E. (2008). "Onset of the Ordovician cephalopod radiation – evidence from the Rochdale Formation (middle Early Ordovician, Stairsian) in eastern New York". Geological Magazine. 145 (4): 490–520. Bibcode:2008GeoM..145..490K. doi:10.1017/S0016756808004585. S2CID 129441156.
- ^ Flower, R.H. (1956). "Cephalopods from the Canadian of Maryland". Journal of Paleontology. 30 (1): 75–96. JSTOR 1300380.
- ^ Rowland, M.; Neville, B.D. (2000). "An annotated bibilographic compendium of paleontological type specimens, chiefly nautiloid cephalopods, attributed to Rosseau H. Flower". In Lucas, S.G. (ed.). New Mexico's Fossil Record 2. New Mexico Museum of Natural History and Science Bulletin. Vol. 16. p. 268.
- Flower, R. H. 1964; Memoir 12, The Nautiloid Order Ellesmeroceratida (Cephalopoda), pp 126, 147, 148. NMBM&MR, Socorro N.M.
- Teichert, C, 1964, Mcqueenoceras, p 166 in Proterocameroceratidae, pp 166–170 in the Treatise on Invertebrate Paleontology, Vol K. GSA and Univ Kansas Press.