20th International Congress of Arachnology

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DENVER MUSEUM OF NATURE & SCIENCE REPORTS | No. 3, July 2, 2016
independently evolved from extinct groups with no
living representatives.
Keywords: SEM, cuticular anatomy, taxonomy
Poster presentation
Spiders from the “LLAMA” collection in the
Museum of Comparative Zoology
Laura Leibensperger
Museum of Comparative Zoology, Department of
Invertebrate Zoology, Harvard University, 26 Oxford
St., Cambridge, MA, 02138, USA
List and photo display of spiders from the “LLAMA” col-
lection (Leaf Litter Arthropods of MesoAmerica) in the
Invertebrate Zoology department collections, Museum
of Comparative Zoology, Harvard University.
Keywords: leaf litter spiders, museum collections
Student - poster presentation
Cladistic analysis of the genus Sphecozone
O. P.-Cambridge, 1870 (Linyphiidae)
Rafael Yuji Lemos¹,², Antonio D. Brescovit¹
¹Laboratório Especial de Coleções Zoológicas, Instituto
Butantan, Av. Vital Brasil, 1500, Butantã, São Paulo,
SP–Brazil, CEP: 05503-900; ²Instituto de Biociências,
Universidade de São Paulo, Rua do Matão, travessa
14, nº 321, Cidade Universitária, São Paulo, SP–
Brazil, CEP: 05508-090
The genus Sphecozone O. P.-Cambridge, 1870 includes 34
species and has S. rubescens as its type-species. Except
for the North American S. magnipalpis Millidge 1993,
all species of the genus occur only in the Neotropics. The
monophyly of Sphecozone is supported by the loss of the
paracymbium and the radical ridge, and the origin of the
atrium. It has Tutaibo Chamberlin, 1916 as sister group,
and is related to Ceratinopsis Emerton, 1882, Dolabritor
Millidge, 1991, Intecymbium Miller, 2007, Gonatoraphis
Millidge, 1991, and Psilocymbium Millidge, 1991 based
on the absence or reduction of paracymbium, a struc-
ture present in the palps of males of the superfamily
Araneoidea. Despite previous studies, the internal relation-
ship and monophyly of Sphecozone is doubtful, and
hypotheses about a possible revalidation of Hypselistoides
Tullgren 1901, and Brattia Simon, 1894, its junior syn-
onyms, are also discussed. In this context, a new cladistic
analysis of Sphecozone is in progress, and currently, is
composed by 18 species of Sphecozone as the ingroup, one
representative of Ceratinopsis, Dolabritor, Intecymbium,
Gonatoraphis, Psilocymbium, Tutaibo and Grammonota
Emerton, 1882, and two of Moyosi Miller, 2007, comprising
the outgroup. So far, preliminary results show only one
most parsimonious tree (L=169; CI=0.46; RI=0.57) and
confirm the uncertainties concerning the monophyly of
Sphecozone, and the possible revalidation of Brattia.
Keywords: phylogeny, parsimony, spiders, Neotropics,
Erigoninae
Oral presentation
Jumping spiders as models for the study
of animal coloration
Daiqin Li
Department of Biological Sciences, National University
of Singapore, 14 Science Drive 4, Singapore 117543
Coloration is one of the most striking phenotypic traits in
animal kingdom and has evolved to serve a great diversity
of functions including camouflage, mimicry, masquerade,
aposematism, pollination, social, and sexual signaling.
However, the increasingly complexities of reconstructing
how the receivers (conspecifics, predators and prey) per-
ceive, integrate and process spectral information present
challenges that hamper accurate, biologically-relevant
appraisals of animal coloration. This is particularly true
in jumping spiders (Salticidae). Salticids are renowned
for their intricate vision-guided predatory and sexual
behavior, and particularly for the acute eyesight of their
principal eyes, which also support color vision, including
UV vision. Most salticids are diurnal predators that prey
on various arthropods, including other spiders, thus pre-
dation pressure from salticids is one of potential selective
force of the evolution of arthropod coloration. Many male
salticids sport garish coloration and some have strikingly
20th International Congress of Arachnology