Evidence for Male Horn Dimorphism and Related Pronotal Shape Variation in Copris lunaris (Linnaeus, 1758) (Coleoptera: Scarabaeidae, Coprini)
نویسندگان
چکیده
منابع مشابه
Hormonal control of male horn length dimorphism in the dung beetle Onthophagus taurus (Coleoptera: Scarabaeidae).
Male dung beetles (Onthophagus taurus) facultatively produce a pair of horns that extend from the base of the head: males growing larger than a threshold body size develop long horns, whereas males that do not achieve this size grow only rudimentary horns or no horns at all. Here we characterize the postembryonic development of these beetles, and begin to explore the hormonal regulation of horn...
متن کاملRevision of the genus Holocephalus (Coleoptera: Scarabaeidae: Scarabaeinae: Coprini)
The genus Holocephalus Hope is revised and now contains fi ve species: H. cristatus (Gillet), H. eridanus (Olivier), H. julieni sp.nov. H. sculptus (Gillet), and H. simoni sp.nov. All taxa are described and illustrated. A key to species of Holocephalus is included. Lectotypes are designated for H. eridanus and H. sculptus. Scarabaeus eridanus Olivier is designated as the type species for the ge...
متن کاملDiet alters male horn allometry in the beetle Onthophagus acuminatus (Coleoptera: Scarabaeidae
Darwin considered the horns of male beetles to be among the most striking examples of sexual selection. As with antlers in deer or elk, beetle horns scale positively with male body size, with the result that large males have disproportionately longer horns than small males. It is generally assumed that such scaling relationships ('static allometries') are insensitive to short-term changes in th...
متن کاملSexual shape dimorphism accelerated by male–male competition, but not prevented by sex-indiscriminate parental care in dung beetles (Scarabaeidae)
Dimorphic sexual differences in shape and body size are called sexual dimorphism and sexual size dimorphism, respectively. The degrees of both dimorphisms are considered to increase with sexual selection, represented by male-male competition. However, the degrees of the two dimorphisms often differ within a species. In some dung beetles, typical sexual shape dimorphisms are seen in male horns a...
متن کاملA chromosomal analysis of Nepa cinerea Linnaeus, 1758 and Ranatra linearis (Linnaeus, 1758) (Heteroptera, Nepidae)
An account is given of the karyotypes and male meiosis of the Water Scorpion Nepa cinerea Linnaeus, 1758 and the Water Stick Insect Ranatra linearis (Linnaeus, 1758) (Heteroptera, Nepomorpha, Nepidae). A number of different approaches and techniques were tried: the employment of both male and female gonads and mid-guts as the sources of chromosomes, squash and air-drying methods for chromosome ...
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ژورنال
عنوان ژورنال: Insects
سال: 2018
ISSN: 2075-4450
DOI: 10.3390/insects9030108