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Copulation With Contralateral Insertion in Entelegyne Spiders (Araneae: Entelegynae: Tetragnathidae)

Copulation With Contralateral Insertion in Entelegyne Spiders (Araneae: Entelegynae: Tetragnathidae) COPULATION WITH CONTRALATERAL INSERTION IN ENTELEGYNE SPIDERS (ARANEAE: ENTELEGYNAE: TETRAGNATHIDAE) by BERNHARD A. HUBER*,1 and ANTOINE SENGLET2 (1Escuela de Biología, Universidad de Costa Rica, Ciudad Universitaria, Costa Rica; 2Route de Begnins, 1267 Vich, Switzerland) ABSTRACT Contralateral insertion, the application of the right male pedipalp to the left female genital opening is for the first time described in entelegyne spiders, Leucauge mariana, Tetragnatha extensa, T. montana and Pachygnatha clercki (Tetragnathidae). It is argued that the absence of a strict "lock-and-key" fit between male and female genitalia allowed the switch from the usual ipsilateral to contralateral insertion. KEY WORDS: copulation, contralateral insertion, spider, Entelegynae, Tetragnathidae. Since Gerhardt's (1921-1933) extensive observations of courtship and copu- lation it has been taken as certain that all entelegyne spiders show ipsilateral insertion during copulation: the right pedipalp is applied to the right side of the epigynum and inseminates the right spermathcca, and vice versa (GERTSCH, 1979: 93). Ipsilateral insertion has been observed in spiders with all kinds of copulatory positions. This led VON HELVERSEN (1976) to argue that this is a highly conservative charactcr which cannot easily be changed once it is established due to the "lock-and-key" like fit of male and female genitalic http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Netherlands Journal of Zoology (in 2003 continued as Animal Biology) Brill

Copulation With Contralateral Insertion in Entelegyne Spiders (Araneae: Entelegynae: Tetragnathidae)

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Publisher
Brill
Copyright
© 1996 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2960
eISSN
1568-542X
DOI
10.1163/156854297X00274
Publisher site
See Article on Publisher Site

Abstract

COPULATION WITH CONTRALATERAL INSERTION IN ENTELEGYNE SPIDERS (ARANEAE: ENTELEGYNAE: TETRAGNATHIDAE) by BERNHARD A. HUBER*,1 and ANTOINE SENGLET2 (1Escuela de Biología, Universidad de Costa Rica, Ciudad Universitaria, Costa Rica; 2Route de Begnins, 1267 Vich, Switzerland) ABSTRACT Contralateral insertion, the application of the right male pedipalp to the left female genital opening is for the first time described in entelegyne spiders, Leucauge mariana, Tetragnatha extensa, T. montana and Pachygnatha clercki (Tetragnathidae). It is argued that the absence of a strict "lock-and-key" fit between male and female genitalia allowed the switch from the usual ipsilateral to contralateral insertion. KEY WORDS: copulation, contralateral insertion, spider, Entelegynae, Tetragnathidae. Since Gerhardt's (1921-1933) extensive observations of courtship and copu- lation it has been taken as certain that all entelegyne spiders show ipsilateral insertion during copulation: the right pedipalp is applied to the right side of the epigynum and inseminates the right spermathcca, and vice versa (GERTSCH, 1979: 93). Ipsilateral insertion has been observed in spiders with all kinds of copulatory positions. This led VON HELVERSEN (1976) to argue that this is a highly conservative charactcr which cannot easily be changed once it is established due to the "lock-and-key" like fit of male and female genitalic

Journal

Netherlands Journal of Zoology (in 2003 continued as Animal Biology) – Brill

Published: Jan 1, 1996

Keywords: spider; Tetragnathidae; contralateral insertion; copulation; Entelegynae

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