Chuck,
technically you are right. But in practice I think it is still useful.
Otherwise, how do you differentiate if a type species is a living or a
fossil one? If the type species is, say, Miocene or what? Holocene? It
wouldn't do it justice, I think.
Sven
Am 2014-01-06 18:25, schrieb Powell, Charles:
> Sevn,
>
> I think your mixing up two different things. Â Extant and extinct
> refer to if an animal or plant is still living today or not.
> Â Holocene, Pleistocene, Pliocene, etc are ages, periods of time in
> the past. Â Animals can be living today and range back in time to the
> Pliocene or older (the are still extant), while a few known from the
> Holocene, from within a few hundred years of present are still
> extinct
> because there are no representatives of the species still alive. Â One
> set of terms is completely different from the other and they
> describes
> different things. Â
>
> Best,
>
> Chuck
>
> On Sun, Jan 5, 2014 at 12:31 PM, nielsen <[log in to unmask]
> [3]>
> wrote:
>
>> John.
>> I, too, used Recent until recently ;) I now switched to use Extant,
>> since Holocene still may include extinct taxa. On the other hand, a
>> living (morpho)species may be around already for Millions of years,
>> so
>> Holocene wouldnt do. It really depends on what you want to say. In
>> my
>> case I wanted to say still living but some species may have become
>> extinct recently. So, they were Recent but not Extant.
>> Cheers,
>> Sven
>>
>> Am 2014-01-05 15:11, schrieb john k tucker:
>>
>>> I have found the discussion of subfossil vs whatever very
>>> interesting. I fear there is no real answer. Among cone shells
>>> there
>>> are a number of species supposedly described from subfossil
>>> specimens. Among others these include _Leptoconus kawamurai,_
>>> which
>>> is
>>> known mostly or entirely from specimens found in harbor dredgings
>>> from
>>> Japan and _Profundiconus emersoni_ from the Eastern Pacific,
>>> which
>>> was
>>> known only from the type material considered to be subfossil
>>> until
>>> live collected specimens were discovered in the collections of
>>> the
>>> Natural History Museum of Los Angeles County by myself and James
>>> McLean in 1993. Apparently Hannas subfossils were really dead
>>> collected specimens of a living species ranging from the Cabo San
>>> Lucas to the Gálapagos Islands in deep water.
>>>
>>> Â I also noted use of the term Recent in a time stratigraphic
>>> context.
>>> I believe that to be technically correct the proper term now is
>>> Holocene Epoch rather than Recent. The Holocene Epoch includes
>>> the
>>> last 11,700 years and began at the end of the Pleistocene. I
>>> mention
>>> this because I consistently used Recent in this context until a
>>> reviewer called this to my attention.
>>>
>>> Â Yours,
>>>
>>> Â --
>>>
>>> John K. Tucker
>>
>>
>
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> ----------------------------------------------------------------------
>
> --
> Charles L. Powell, II
> U.S. Geological Survey, MS 975
> 345 Middlefield Road
> Menlo Park, CA Â 94025
>
> 1-650-329-4985
> https://profile.usgs.gov/cpowell/ [4]
>
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