20th International Congress of Arachnology

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DENVER MUSEUM OF NATURE & SCIENCE REPORTS | No. 3, July 2, 2016
data was only available for a fraction of the species. This
dataset include both mitochondrial (COI, 12S and 16S) and
nuclear gene fragments (28S and 18S) for 39 taxa. This
dataset was analyzed under Bayesian Inference, Maximum
Likelihood and parsimony. The data support the monophyly
of Charinidae, whereas the genera Charinus and Sarax are
para- and/or polyphyletic. A new classification of the family
is proposed, including establishment of new genera, and
new diagnostic characters for the family is presented.
Keywords: diversity, DNA, morphology, systematics, whip
spider
Student - oral presentation
Fossil and setae characters: the morphologi-
cal phylogeny of the family Protoschizomidae
(Arachnida: Schizomida)
Rodrigo Monjaraz-Ruedas1,2, Oscar F. Francke2, Carlos E.
Santibáñez-López3
1Posgrado en Ciencias Biológicas, Universidad Nacional
Autónoma de México; Av. Universidad 3000, C.P. 04510,
Coyoacán, Distrito Federal, México; 2 Colección Nacional
de Arácnidos, Departamento de Zoología, Instituto de
Biología, Universidad Nacional Autónoma de México.
Ciudad de México, México; 3Departamento de Medicina
Molecular y Bioprocesos. Instituto de Biotecnología,
Universidad Nacional Autónoma de México. 2001 Av.
Universidad, Cuernavaca, Morelos 62210, Mexico
Family Protoschizomidae, endemic to North America,
is currently represented by two genera and 15 species.
Whereas most of the species are troglobite and distrib-
uted in caves in the Sierra Madre Oriental system; or in
caves in the Sierra Madre Occidental system; others are
epigean (Protoschizomus pachypalpus, Protoschizomus
occientalis and Protoschizomus rowlandi). Recently,
a new species member of this family was described from
one cave in the Mexican Trans-Volcanic Belt, represent-
ing the bridge between both Sierras. Here, we revise
the systematics of Protoschizomidae; we also propose
the nomenclature for the pedipalp setae of the protos-
chizomids; and revise the phylogenetic status of family
Protoschizomidae using 137 morphological characters
(including the proposed pedipalp setae) and 7 outgroup
taxa (including one fossil taxa). Our selected topology,
showed Protoschizomidae monophyletic, but its internal
relationships were not fully resolved. Genus Protoschizo-
mus was recovered paraphyletic due to the inclusion of
genus Agastoschizomus (recovered monophyletic) and
the fossil Onychothelyphonus bonneri. Biogeographical
history hypothesis are hard to resolve given our results;
nevertheless, a hypothesis was given and compared to
a similar case found in Scorpiones. The intromission
of these specimens to different caves can be a factor to
discuss in the current distribution of this family.
Keywords: phylogenetics, cladistics, setae, morphology
Student - poster presentation
Tails or heads? Setae patterns and annuli
in the female flagellum of micro-whip
scorpions (Arachnida: Schizomida)
*Rodrigo Monjaraz-Ruedas1,2, Oscar F. Francke2, Jesús A.
Cruz-López1,2, Carlos E. Santibáñez-López3
1Posgrado en Ciencias Biológicas, Universidad Nacional
Autónoma de México; Av. Universidad 3000, C.P. 04510,
Coyoacán, Distrito Federal, México; 2Colección Nacional
de Arácnidos, Departamento de Zoología, Instituto de
Biología, Universidad Nacional Autónoma de México.
Ciudad de México, México; 3Departamento de Medicina
Molecular y Bioprocesos. Instituto de Biotecnología,
Universidad Nacional Autónoma de México. 2001 Av.
Universidad, Cuernavaca, Morelos 62210 Mexico
Schizomid flagellum is consider one of the most important
characters used to delimitate species, whereas the number
of “flagellomeres”, in the female flagellum, is used to
diagnose genera in both families. Despite the traditional
use in schizomid taxonomy, the phylogenetic importance
of these characters has been only tested in the systematics
of family Protoschizomidae. However, our understanding
in this pseudosegmentation of the flagellum, along with
different “terminologies” proposed, and the relative posi-
tion of certain setae, creates conflict in terms of homology
assessments. In the present contribution, we present some
homology hypotheses and the phylogenetic importance
20th International Congress of Arachnology