Dear Harry et al - For what it's worth, I have always used
amygdalumtostum as the first available name for this species for the
reasons you stated.  It does need a neotype though to stabilize the
concept...  Cheers - Gustav

Harry G. Lee wrote, On 2/2/2011 11:55 AM:
> Dear Siong,
>
> Now that I've had time to mull over the paper, I must disagree with
> García and Oliver's (2008: 15-18) nomenclatorial remedy for the Toasted
> Almond Ark.
>
> Considering that Lamy (1906: 303-305; fig. 1) illustrated the holotype
> of /Arca cancellaria/ Lamarck, 1819 (p. 41) from the Defrance Collection
> and placed the taxon in the tropical western Atlantic, it seems to me
> the designation of a neotype for the _somewhat_ controversial /Arca
> amygdalumtostum/ Röding, 1798 (p. 175; species 226), consistent with the
> prevailing _modern_ concept of its identity (Indo-Pacific: e.g., Abbott
> and Dance, 1982, García and Oliver, 2008, WORMS, etc.), would be a
> better path to nomenclatorial stability than forcing the unavailable
> /Arca fusca/ Bruguière, 1789 (p. 102; species 10), with its own set of
> ambiguities, into legitimacy.
>
> Abbott, R.T. and S.P. Dance, 1982. /Compendium of seashells/. E.P.
> Dutton, New York. x + 1-411 + [1], incl. numerous text figs.
>
> Bruguière, J.G., 1789. /Encyclopédique méthodique des trois règnes de la
> nature vers, coquilles, mollusques et polypiers. Tome première partie
> 1/. Agasse, Paris. Pp 1-344. June.
> Available on-line at
> <http://www.biodiversitylibrary.org/item/35783#page/132/mode/1up >.
>
> García, A.A. and P.G. Oliver, 2008. Species discrimination in seven
> species of /Barbatia/ (Bivalvia: Arcoidea) from Thailand with a
> redescription of /B. grayana/ (Dunker, 1858). /Raffles Bulletin of
> Zoology Supplement 18/: 7-23.
> Available on-line at
> <http://rmbr.nus.edu.sg/rbz/biblio/s18/s18rbz007-023.pdf>.
>
> Lamarck, J.B.P.A. de M. de, 1819. /Histoire naturelle des animaux sans
> vertèbres présentant les caractères généraux et particuliers de ces
> animaux, leur distribution, leurs classes, leur familles, leurs genres,
> et la citation des principales espèces qui s'y rapportent; précédée
> d'une introduction offrant la détermination des caractères essentiels de
> l'animal, sa distinction du végétal et des autres corps naturels; enfin
> l'exposition des principes fondamentaux de la zoologie. [Première
> édition] Tome 6 Partie 1. /Lamarck, Paris. i-vi + 1-343. Available
> on-line at
> <http://www.biodiversitylibrary.org/item/89219#page/53/mode/1up >.
>
> Lamy, É., 1906. Sur quelques arches actuelles nommées par Lamarck dans
> la collection Defrance (Musée de Caen). /Journal de Conchyliologie 53/:
> 302-309.
> Available on-line at
> <http://www.biodiversitylibrary.org/item/55051#page/338/mode/1up >.
>
> Röding, P.F., 1798. /Museum Boltenianum sive catalogus cimeliorum e
> tribus/ [sic]/regnis naturae quae olim collegerat Joa. Fried Bolten, M.
> D. p. d. per XL. annos proto physicus Hamburgensis. Pars secunda
> continens conchylia sive testacea univalvia bivalvia & multivalvia./
> viii + pp. 1-199. [Reprinted in facsimile by Sherborn and Sykes, 1906,
> which was republished by American Malacological Union, 1986].
> Available on-line at <http://www.biodiversitylibrary.org/item/41571#13>.
>
> Harry
>
> At 07:56 PM 1/30/2011 Siong Kiat wrote:
>> ......... Both Barbatia fusca(Bruguière, 1789) non Lightfoot, 1786,
>> and Barbatia
>> amygdalumtostum (Röding, 1798) have been considered the correct name to
>> use for a common brown Indo-Pacific arcid species. I have been using B.
>> amygdalumtostum for this species and rejecting fusca (Bruguière, 1789) as
>> it is a junior homonym. Barbatia amygdalumtostum has been consistently
>> applied to this Indo-Pacific species, and is also accepted by WORMS as
>> valid.
>>
>> Recently I came across an argument in García & Oliver (2008) who
>> advocated
>> the use of B. fusca(Bruguière, 1789), suggesting that the senior homonym,
>> Arca fusca of Lightfoot (1786), is a nomen dubium, and that B.
>> amygdalumtostum actually refers to a West Indies species.
>>
>> I have checked and indeed the references cited by Röding for
>> amygdalumtostum suggests that it is a West Indies species, however the
>> figure in Chemnitz (1784: pl. 54, fig. 534) cited is, in my opinion, the
>> Indo-Pacific form.
>>
>> Also if B. amygdalumtostom is indeed a West Indies species, would it not
>> make it a senior synonym of B. cancellaria (Lamarck, 1819)?

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