Op zaterdag 16 juli 2022 om 10:45:09 UTC+2 schreef DD'eDeN aka note/nickname/alas_my_loves:
https://www.sciencedaily.com/releases/2022/03/220323125107.htm
Spinosaurs: divers, swimmers, or waders?
:-) Thanks a lot for this article, my dear boy, see my comment there:
Thanks a lot for this beautiful article. You say "the relationship between bone density and aquatic ecologies across extant amniotes provides a reliable inference of aquatic habits in extinct species". However, many palaeoanthropologists still believe
that human ancestors left the forests for the open plains, and that for some obscure reason the heavy bones of Homo erectus (pachy-osteo-sclerosis) did NOT indicate aquatic habits. In a number of articles we showed that not only pachyosteosclerosis
indicated shallow-diving habits in Homo erectus, but also their coastal dispersal as far as Java (and later Flores island), their remarkable brain enlargment (as in dolphins and seals), their stone tool use (for opening shellfish, cf. sea-otters), the
shell engravings Stephen Munro found in the Dubois collection (Naturalis, Leiden, NL), and in our opinion even their projecting midface, broad body and pelvis (platypelloidy), flat plantigrade feet etc.: all this shows that there is no doubt any more
that Homo erectus were no endurance-runners on African savannahs as some palaeoanthropologists assumed, but were predominantly shallow divers, probably mostly for shellfish. For an overview and references, google e.g. "coastal dispersal Pleistocene Homo
PPT".
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