Re: micro-wear (Re: Lucy partial KWer (Re: Lucy not a knuckle-walker (Re: Obligate Bimanualism


"Mario Petrinovich" <mario.petrinovic1@xxxxxxxxxxx> wrote in message
news:dkdhn7$e1o$1@xxxxxxxxxxxxxxxxx
> Marc Verhaegen:
> >Mario Petrinovich:
> >> > Soft foods don't leave traces, Mario, eg, even most fruits don't
leave
> > traces, IOW, apith microwear doesn't say anything on whether they ate
> > fruits, but since all hominoids eat fruits, there's little doubt apiths
> > also
> > ate fruits, at least seasonally, but *acidic* fruits sometimes leave
> > microwear traces, eg, P-F.Puech 1984 "Acidic-food choice in Homo habilis
> > at Olduvai" Curr.Anthrop.25:349-350 (OH-16). --Marc
> >
> >> Thanks, Marc. -- Mario
> >
> > P-F.Puech thinks the OH-16 diet included acidic parts of papyrus:
> > "Cyperaceae fruits were common in H.habilis habitat (Bonnefille 1984).
> > Ancient Egyptians ate Cyperus papyrus root which was also present at
> > Olduvai
> > in swamp-margins and river banks" (Puech 1992). "...in the sediments of
> > Beds
> > I and II ... swamp vegetation is indicated by abundant vertical roots
> > channels and casts possibly made by some kind of reed. Fossil rhizomes
of
> > papyrus also suggest the presence of marshland and/or shallow water"
> > (Conroy
> > 1990). A likely evolution is this: according to their microwear & to
> > where
> > they were found, early apiths ate mashland plants (afarensis AL.333
"bones
> > were found in swale-like features . they died and partially rotted at or
> > very near this site . this group of hominids was buried in streamside
> > gallery woodland" (Radosevich cs.1992)).
> >
> > In their successors in E.Africa after 2 Ma, this had split into 2 diets:
> > 1) one including more woody parts, eg, parts of reeds or sedges: boisei,
> > eg,
> > Chesowanja: "The fossiliferous sediments were deposited in a lagoon .
> > Abundant root casts . suggest that the embayment was flanked by reeds
and
> > the presence of calcareous algae indicates that the lagoon was warm and
> > shallow. Bellamya and catfish are animals tolerant of relatively stagnan
t
> > water..." (Carney cs.1971),
> > 2) one more omnivorous: habilis (apith IMO, possibly not Homo), see
above.
>
> Thanks, Marc. I am not sure, but thanks. -- Mario

Nor am I, but it's a gradual evolution which fits all known data, and there
are no serious alternatives.

--Marc


.

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