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Post by Theropod on Jan 31, 2014 22:56:45 GMT
Recently, people in the forum showed some interest for the possible species described by Dale Rusell in 1996. So what do you guys think? "Described by Taquet and Russell in 1998, the specimen is 13.4 to 13.6 centimeters (5.3–5.4 in) in width; no length was stated. The specimen was located in Algeria, and "is of Albian age." Taquet and Russell believed that this specimen along with a premaxilla fragment (SAM 125), two cervical vertebrae (SAM 126-127), and a dorsal neural arch (SAM 128), belonged to S. maroccanus." "NMC 50791, held by the Canadian Museum of Nature, is a mid-cervical vertebra which is 19.5 centimeters (7.7 in) long from the Kem Kem Beds of Morocco. It is the holotype of Spinosaurus maroccanus as described by Russell in 1996. Other specimens referred to S. maroccanus in the same paper were two other mid-cervical vertebrae (NMC 41768 and NMC 50790), an anterior dentary fragment (NMC 50832), a mid-dentary fragment (NMC 50833), and an anterior dorsal neural arch (NMC 50813). Russell stated that "only general locality information could be provided" for the specimen, and therefore it could be dated only "possibly" to the Albian."
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Post by themechabaryonyx789 on Jan 31, 2014 23:07:06 GMT
Awesome
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Post by thesporerex on Feb 1, 2014 11:12:35 GMT
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Post by themechabaryonyx789 on Feb 1, 2014 12:04:18 GMT
The fact that there could be a new species of large theropod...
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Post by thesporerex on Feb 1, 2014 22:46:04 GMT
The fact that there could be a new species of large theropod... Its only a subspecie, and this thread is to debate whether it exists or not.
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Post by Theropod on Feb 2, 2014 23:57:06 GMT
Yeah this is not a discovery, it is a place to debate. I only provided some stuff about the species. Also Sporerex it is not a subspecies, its classification is as high as S. aegyptiacus, they are both species in the Spinosaurus genus.
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Post by thesporerex on Feb 5, 2014 21:34:26 GMT
Yeah this is not a discovery, it is a place to debate. I only provided some stuff about the species. Also Sporerex it is not a subspecies, its classification is as high as S. aegyptiacus, they are both species in the Spinosaurus genus. yes that what subspecie means(correct me if I am wrong)
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Post by Theropod on Feb 10, 2014 10:11:59 GMT
Yeah this is not a discovery, it is a place to debate. I only provided some stuff about the species. Also Sporerex it is not a subspecies, its classification is as high as S. aegyptiacus, they are both species in the Spinosaurus genus. yes that what subspecie means(correct me if I am wrong) A subspecies is a lower classification than a species, and those two are not higher than eachother in classification terms. Both are in the same genus and are classificated as species, though S. maroccanus is still a bit dubious.
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Post by thesporerex on Feb 10, 2014 16:10:19 GMT
I am still a bit foggy in the terms but I understand for the most part, thanks for the clarification.
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Post by Theropod on Feb 10, 2014 21:51:44 GMT
Welcome. Also, if I am not mistaken, if this was a subspecies it would be called Spinosaurus aegyptiacus maroccanus (Like Gorilla beringei beringei).
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Post by ornitholestes on Apr 22, 2014 17:09:46 GMT
I’m gonna throw my two cents in:
Regarding whether S. maroccanus is a valid species, that’s a subjective decision, and I’m myself undecided. Dal Sasso et al. 2005 synonymized it with S. aegyptiacus, but there is/was next to no overlapping material between them. The differentiation originally based on vertebral remains, I don’t know whether it is valid, and I cannot find Russell 1996 anywhere. The referral of the rostrum seen above seemingly bases on nothing more than its distribution (i.e. it is just as hypothetical as the assignment of MSNM V 4047 to S. aegyptiacus).
However I do think that the taxon represented by MNHN SAM 124 (Taquet & Russell 1998) is synonymous with the one described by Dal Sasso et al., tough belonging to a considerably smaller individual. The rostra strongly resemble each other in all their features. My best estimate would be that it is of similar size to the holotype of S. aegyptiacus. --- So imo MSNM v4047 and MNHN SAM 124 belong to the same species, but I’m not sure whether that species is also the same as the blown-up holotype of S. aegyptiacus, and I’ve got no idea whether S. aegyptiacus is distinct from S. maroccanus.
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Post by Theropod on Apr 22, 2014 17:17:14 GMT
I also do not think we are at anywhere fair enough to call it a new species, while common sense would tell us that it is actually just the same species. I also can't seem to find much on Russell 1996.
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