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Artículo

Female genital morphology and mating behavior of Orchestina (Arachnida: Araneae: Oonopidae)

Burger, Matthias; Izquierdo, Matías AndresIcon ; Carrera, Patricia CristinaIcon
Fecha de publicación: 03/2010
Editorial: Elsevier Gmbh
Revista: Zoology
ISSN: 0944-2006
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Biológicas

Resumen

The unusual reproductive biology of many spider species makes them compelling targets for evolutionary investigations. Mating behavior studies combined with genital morphological investigations help to understand complex spider reproductive systems and explain their function in the context of sexual selection. Oonopidae are a diverse spider family comprising a variety of species with complex internal female genitalia. Data on oonopid phylogeny are preliminary and especially studies on their mating behavior are very rare. The present investigation reports on the copulatory behavior of an Orchestina species for the first time. The female genitalia are described by means of serial semi-thin sections and scanning electron microscopy. Females of Orchestina sp. mate with multiple males. On average, copulations last between 15.4 and 23.54 min. During copulation, the spiders are in a position taken by most theraphosids and certain members of the subfamily Oonopinae: the male pushes the female back and is situated under her facing the female's sternum. Males of Orchestina sp. possibly display post-copulatory mate-guarding behavior. The female genitalia are complex. The genital opening leads into the uterus externus from which a single receptaculum emerges. The dorsal wall of the receptaculum forms a sclerite serving as muscle attachment. A sclerotized plate with attached muscles lies in the posterior wall of the uterus externus. The plate might be used to lock the uterus during copulation. The present study gives no direct evidence for cryptic female choice in Orchestina sp. but suggests that sexual selection occurs in the form of sperm competition through sperm mixing.
Palabras clave: Complex Genitalia , Cryptic Female Choice , Haplogynae , Oonopidae , Sperm Competition
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/68994
DOI: http://dx.doi.org/10.1016/j.zool.2009.08.001
URL: https://www.sciencedirect.com/science/article/pii/S0944200610000024
Colecciones
Articulos(MACNBR)
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Citación
Burger, Matthias; Izquierdo, Matías Andres; Carrera, Patricia Cristina; Female genital morphology and mating behavior of Orchestina (Arachnida: Araneae: Oonopidae); Elsevier Gmbh; Zoology; 113; 2; 3-2010; 100-109
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