THE NAUTILUS 119(2):55-.S2. 2005
Pase 55
A re\ision of the genus Trophon Montfort, ISIO (Gastropoda:
Muricidae) from southern South America
Guido Pastorino
Museo Argentino de Cieiifias
Natiirales
Av. Angel C.alkuxk) 470. 3" pisd lal). 57
C1405DJR Buenos Aires
ARGENTINA
[email protected]
ABSTRACT
The genus Trophon from southern South Anu riea is re\ised
and restricted to ten \;ilid species from among the 36 nominal
species still currenth' used. In addition, a new .species, Trophon
pnrodizi from Patagonian waters, is deserihed. Adult specimens
of the new ta.\on are illustrated, descrilied and compared with
other h\ing species of the same genns and similar geographic
distribution. Redescription and re-illusti'ation of t\pes, based
on material from sexeral institutions around the world are pro-
\ided for Trophon geversianus (PiJlas. 1774), T plicatnfi (Light-
foot, 1786), T. patagonicus (d'Orbigny, 1839), T ucunthodcs
Watson, 1882, T pelseneeri Smith, 19] 5, T /nncttci Carcelles,
1946, T denchi (Carcelles, 1953), V u ilhchucnsis Ramirez-
Bohme. 1981. and T. hahamomlei McLean and Andrade, 1982.
In addition. "Trophon" niaJrinannn Strebel. 1908. assigned to
oenera incerta. is also redescribed and illustrated.
IXTRODULTIUN
Among manv groups of marine gastropods from South
American waters m need of a modern compreliensi\e
re\ision. tlie high di\ersit\" and aliimdance exhiliited In
tlie muricid genus Trophon Montfort. LSIO. renders it
particularly interesting. Early collections include a large
and \'aried arrav of specimens obtained l)\ 19''' centui-y
e-\"peditions from shallow waters of a vast area including
more than 5.000 km of coast in Argentina. A ta-xonomic
re\ision of diese gastropods revealed that a large mun-
ber of names should be placed in s\'nonymv. The ta.x-
onom\' and nomenclature thus clarified is sure to im-
prove tlie usefulness of this genirs and its species as tools
for biogeographic and ex^olutionai")' inteipretations, with-
out forgetting that clear specific delimitation is crucial
to odier uses such as the commercial exploitation of the
t\pe species (Trophon geversianus) in southern Chile.
The subfamiK" Trophoninae is one of the most con-
spicuous groups of marine gastropods living presently
around the soudiem tip of South America. The soutiiern
origin of the group seems to be beyond doubt, as dis-
cussed b}" Griffin and Pastorino (2005), when revising
the numerous extinct species appearing in the fossil re-
cord since the late Oligocene.
This article constitutes a review of all lixing species of
Trophon from both coasts of southern South America.
The stud\ invoKes only those taxa living in en\ironments
associated with the continental shelf. AccordingK", T nui-
cronc Houart, 1991. from L5()0-1575 m off Brazil and
the subantarctic T vcronicac Pastorino, 1999, are not
considered herein. These txvo deep-water species seem
to belong in a different group according to data available
on the radula. protoconch, and penis of T vcronicae.
Such anatomical data remain imknown for T. miicronc.
In addition, T ohUni Strebel, 1904, with a distinct pro-
toconch and radida, different from those of other Pata-
gonian species and resembling the boreal Boreotrophon
tnincatus, will be die subject of a future paper Finally,
T triacanthus Castellanos et ak, 1987, recently described
mider Trophon, is also considered as belonging to a dif-
ferent genus
Localities extracted from OCR text.
Specimen codes extracted from OCR text.
BioStor
