| Abstract |
A phylogenetic analysis was conducted including representatives
from all recognized extant and extinct families of the Xanthoidea
sensu lato, resulting in one new family, Hypothalassiidae. Four
xanthoid families are elevated to superfamily status, resulting in
Carpilioidea, Pilumnoidoidea, Eriphioidea, Progeryonoidea, and
Goneplacoidea, and numerous subfamilies are elevated to fam-
ily status. The Mathildellidae is moved from the Goneplacidae
to the Portunoidea. Diagnoses for all superfamilies and families
discussed herein are provided, embracing characters typically
used by biologists as well as readily fossilized features of the
dorsal carapace, sternum, abdomen, and chelipeds. All genera
known from the fossil record at one time referred to the Xanthi-
dae sensu lato, Xanthoidea sensu lato, or Goneplacidae sensu
lato were evaluated as to their family level placement and as a
result, the family-level placement of many of these genera has
been changed herein. Balcacarcinus new substitute name, is
provided herein for Bittneria Schweitzer and Karasawa, 2004. |
