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, Theridiosomatidae).
Autor/es:
LABARQUE, F. M.; PIACENTINI, L. N.; RAMÍREZ, M. J.; PONS, J.; ARNEDO, M.
Lugar:
Mexico DF
Reunión:
Conferencia; III International Barcode of Life Conference; 2009
Institución organizadora:
iBOL
Resumen:
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 adult’s 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.