MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Inferring Biodiversity Patterns and Life-History Traits in Ray Spiders (Araneae, Theridisomatidae)
Autor/es:
FACUNDO MARTÍN LABARQUE; LUIS NORBERTO PIACENTINI; MARTÍN JAVIER RAMÍREZ; JOAN PONS; MIGUEL ÁNGEL ARNEDO
Lugar:
México DF, México
Reunión:
Conferencia; III International Barcode of Life Conference; 2009
Resumen:
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DNA
barcoding promises to revolutionize biodiversity studies by allowing identification
of all life stages and facilitating species discovery. In this contribution, we
evaluate the advantages of DNA barcoding techniques to assess alfa and beta
diversity in a biodiversity hotspot, the clouds forest of Panama.
The orbicularian spider family Theridiosomatidae is the sister groups of all the
remaining Symphytognathoids, is very diverse, with 12 genera and 77 species
distributed in four subfamilies.
Theridiosomatidae
is a good candidate to evaluate the benefits of the use of barcoding approaches
to investigate biodiversity patterns. The taxonomy is relatively well known at
the genus level. One of the most distinctive traits of the family are the egg-sacs.
They had different kinds of shapes: cubical, spheroidal, pear-shaped, or
fluted. Some genera have been documented to build particular types of egg-sacs,
others built similar ones, and some others more than one type. In addition, we
used barcode techniques to link egg-sac types to particular species to gain
insight on the usefulness of egg-sac shape for bioinventoring purposes.
The
collected samples were sorted at the morphospecies level, with 24
morphospecies, and nine egg-sacs types. Morphotypes from each
morphospecies/species and one egg-sac from every type were selected to be
imaged. The 5-cox1 fragment for five specimens per species per locality were
sequenced, in total 241 specimens and 41 egg-sacs.
Neighbor-joining
results, supported by bootstrap values, showed 100% matching between our
previously selection of morphotypes belonging to the same morphospecies.
Egg-sacs types corresponded with adults morphospecies of the same genus, and
from the same locality. In addition, an unexpected preliminary result of our
study was the finding of wasp parasites (Ichneumonidae, Hymenoptera) in some of
the analyzed egg-sacs. DNA barcodes allowed us to identify them. Alfa and beta
diversity is discussed.