Chuck and Harry,

if it comes down to Chilean species, you may want to consult our work on
some fossil type material.

Griffin, M. & S.N. Nielsen 2008. A revision of the type specimens of
Tertiary molluscs from Chile and Argentina described by dOrbigny (1842),
Sowerby (1846), and Hup (1854). Journal of Systematic Palaeontology 6,
doi:10.1017/S1477201907002374.

Best wishes,
Sven

> A little more on the subject; this time with a more taxonomic perspective:
>
> Venus costellata G.B. Sowerby I, 1835 is extremely close to V.
> antiqua, King and Broderip,, 1831, which has been placed by recent
> workers in Ameghinomya von Ihering, 1907 [Type species is a fossil
> taxon which I cannot find in a brief literature search]. The figure
> in Basly (1983: plate 11, fig. 91) is close to identical to the Thes.
> Conch. illustration cited in my earlier post.
>
> As I reviewed the Thesaurus further, I noted that in the index to the
> Veneridae (G. B. Sowerby II, 1853b) there was an entry: "antiqua,
> Gray, Ven. costellata, sp. 4." I then found I had overlooked an entry
> "Dosinia antiqua, Gray" under  4. "Venus costellata" in the text
> (G.B. Sowerby II, 1835a: 705). It appears that Sowerby "junior"
> recognized the synonymy here. Unfortunately, I see no evidence that
> this observation, let alone the proper attribution and chronologic
> priority, has been considered by recent workers. Maybe Dick or one of
> our pelecypod aficionados can pick up the thread at this point.
>
> The genus Eurhomalea Cossmann, 1920 [Type species Venus rufa Lamarck,
> 1818 OD; Recent, Chile] is also a venerid group in the same
> geographical area as Venus costellata G.B. Sowerby I, 1835 but I
> don't think it relates to the topical taxon directly.
>
> Harry
>
> G. B. Sowerby II, 1853b. Index to the Veneridae. Thesaurus
> Conchyliorum 2: 746-762.
>
> At 05:02 PM 8/2/2010, Harry G. Lee wrote:
>>Dear Chuck,
>>
>>In order to keep Dick from revisiting his magnum opus (Petit, 2009:
>>101) again, let me try to tackle this one.
>>
>>the binomen Venus costellata dates from June 1, 1835 (G.B. Sowerby
>>I, 1835: 42). The first figure of it appears to be in the Thesaurus
>>Conchyliorum (G.B. Sowerby II, 1853: pl. 153, fig. 14), and it could
>>easily pass for a Protothaca. The companion text (G.B. Sowerby II,
>>1853: 705) gives the locality as "Valparaiso, Chili [sic], and
>>Callao, Peru; in coarse sand, six to fifteen fathoms. Cuming."
>>
>>Chama thaca Molinas, 1782 [Type species of Protothaca Dall, 1902 OD]
>>is similar but seems to have more centrally-placed beaks
>>(Marincovich, 1973: 12-13; fig. 15).
>>
>>Marincovich, L., 1973. Intertidal mollusks of Inquique, Chile.
>>Natural History Museum Los Angeles County Science Bulletin 16: 1-19
>>+ v. Feb. 20.
>>Petit, R.E., 2009. Petit, George Brettingham Sowerby, I, II, & III:
>>their conchological publications and molluscan taxa. Zootaxa 2189:
>>(1)-218. Aug. 6.
>>Sowerby, G.B. I, 1835. Characters of new s[pecies of shells
>>contained in Mr. Cuming's collection. Proceedings of the Zoological
>>Society of London 1835: 41-47. June 1.
>>Sowerby, G.B. II, 1853a. Monograph of the genus Venus. Thesaurus
>>Conchyliorum 2: 705-739 + 740-742 [plate explanations] + plates 152-162.
>>
>>Harry
>>
>>
>>At 03:49 PM 8/2/2010, you wrote:
>>>I'm working on some middle Miocene fossil mollusks from southern Orange
>>>County, southern California and have an internal mold that matches in
>>> shape
>>>fairly well with Protothaca costellata (Sowerby) illustrated in Axel A.
>>>Olsson (1961, Mollusks of the tropical eastern Pacific. Panamic-Pacific
>>>Pelecypoda: Paleontological Research Institute, Ithaca, pl. 49, f. 3).
>>> But
>>>I can find no further record of that species in Olsson or elsewhere.
>>> Any
>>>help running down the species name or what that species is now called
>>> would
>>>be appreciated.
>>>
>>>Best,
>>>
>>>Chuck
>>>
>>>Charles L Powell, II
>>>Western Earth Surface Processes Team, MS 975
>>>U. S. Geological Survey
>>>345 Middlefield Rd.
>>>Menlo Park, CA  94025
>>>[log in to unmask]
>>>(650) 329-4985
>>>https://profile.usgs.gov/professional/mypage.php?name=cpowell
>


Dr. Sven Nielsen
Institut für Geowissenschaften
-Paläontologie-
Christian-Albrechts-Universität Kiel
Ludewig-Meyn-Str. 10
24118 Kiel
Germany

----------------------------------------------------------------------
[log in to unmask] - a forum for informal discussions on molluscs
To leave this list, click on the following web link:
http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1
Type your email address and name in the appropriate box and
click leave the list.
----------------------------------------------------------------------