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Baltic Journal of Coleopterology
XVth Symposium of Polish Carabidologists
Tatra National Park 04-07.06.2017


Current issue: Volume 21, No. 2 (2021)

Preliminary data on adult sex-ratio in Phyllognathus excavatus (Coleoptera: Scarabaeidae) in central Italy

Luca Luiselli, Marina Giustini, Raffaele Luiselli

Luiselli L., Giustini M., Luiselli R. 2021. Preliminary data on adult sex-ratio in Phyllognathus excavatus (Coleoptera: Scarabaeidae) in central Italy. Baltic J. Coleopterol., 21(2): 135 - 139.

The adult sex-ratio of a widespread dynastine beetle characterized by remarkable sexual shape dimorphism, Phyllognathus excavatus (Forster, 1771), is reported herein for the first time with regards to the Italian populations. These beetles were studied in a coastal locality of Mediterranean central Italy (Latium), and showed a significantly female-biased sex ratio (4.2 females for each male), with a daily sex-ratio fluctuating from equality to 7:1 towards females. Comparisons are presented with sex-ratios of other dynastine beetles studied elsewhere.

KeyWords : Scarabaeoidea, Dynastinae, Pentodontini, adult sex-ratio, Italy.

Luca Luiselli, Institute for Development, Ecology, Conservation and Cooperation, via G. Tomasi di Lampedusa 33, I-00144 Rome, Italy, and Department of Zoology, University of Lomé, Lomé, Togo, e-mail: l.luiselli@ideccngo.org, lucamaria.luiselli@uniroma3.it
Marina Giustini, Cooperativa Spazio Libero, Largo Pannonia 42, 00183 Rome, Italy, e-mail: giustini67@gmail.com
Raffaele Luiselli, via Olona 7, 00198 Rome, Italy, e-mail: raffaele.luiselli@gmail.com

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Volume 21, No. 2 (2021)
Volume 21, No. 2 (2021)


Volume 21, No. 1 (2021)
Volume 21, No. 1 (2021)