[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
John Conway (firstname.lastname@example.org) wrote:
<Could anyone advise me on the _Lagosuchus_/_Marasuchus _ situation, and
the etymology of _Marasuchus_?>
*Lagosuchus talampayensis* is a taxon based on only hindlimb material
and some pelvic elements. Bonaparte described a new species to Romer's
genus and labelled it *Lagosuchus lilloensis*. However, the material is
that of a nearly complete taxon, and in the early 1990's, Andrea Arcucci
expressed doubts about the relationship of *L. lilloenis* to *Lagosuchus*,
especially in regards to the diagnostic value of the *Lagosuchus
talampayensis* holotype, and in 1994, Sereno and Arcucci redescribed the
species as *Marasuchus lilloensis*, and indicated that the holotype of
*Lagosuchus* (now monotypic) was in fact devoid of apomorphies, and
referred it to a nomen dubium. While this may be true based on present
knowledge, it is more than likely that *Lagosuchus* and *Marasuchus*
represent congeneric taxa; problematically, the type species was not found
to be diagnostic, and any other included (and diagnostic) species must be
renamed to reflect this.
*Marasuchus* is named for the rodent, called a mara, which resembles a
rabbit, and was intended to retain the "spirit" of Alfred Romer's name
(*Lagus*, a rabbit, from the Latin for "rabbit").
All restorations of *Lagosuchus* are based on the lilloensis material,
and it would be fair and easy to use this to represent *Marasuchus*. Note,
in 1988, Paul considers *M. lilloensis* con_specific_ with *L.
talampayensis*, though most other authors now separate the two and agree
with Sereno and Arcucci.
Note, this is not intended as an evaluation of the type material of
Jaime A. Headden
Little steps are often the hardest to take. We are too used to making leaps
in the face of adversity, that a simple skip is so hard to do. We should all
learn to walk soft, walk small, see the world around us rather than zoom by it.
Do You Yahoo!?
Yahoo! Health - your guide to health and wellness