Topic
Hemimerus
About: Hemimerus is a research topic. Over the lifetime, 4 publications have been published within this topic receiving 130 citations.
Papers
1 Oct 1962
TL;DR: The head of Hemimerus so differs from those of the dermapteran types that this, together with consideration of other anatomical features, resulted in the Hemimerina having been regardod as a separate order of insects.
Abstract: Arixenia esau (Dermaptera) feeds on the skin of bats of the genus Cheiromeles. The food material is collected by the maxillae, lifted through the cibarium by the hypopharynx and then pushed into the oesophagus by the orally directed setae on the mandibles. Arixenia jacobsoni has less specialised mouthparts and feeds upon insects inhabiting bat guano in a similar way to many carnivorous labidurid earwigs. Hemimerus talpoides (Hemimerina), which feeds upon the skin of the giant rats of the genus Cricetotnys, cuts off food particles from the host with the mandibles and then passes the food material through the cibarium into the oesophagus by means of the maxillae.
The form of the head and neck of Arixenia can be derived from a pygidicranid or labidurid type and the apparently “primitive” features of the head of Arixenia can be explained as the result of a change of feeding habits from being carnivorous insects to external parasites of mammals. The head of Hemimerus so differs from those of the dermapteran types that this, together with consideration of other anatomical features, resulted in the Hemimerina having been regardod as a separate order of insects.
16 citations
TL;DR: The parasitic insect Hemimerus bouvieri, of rather uncertain systematic position but probably an aberrant member of the order Dermaptera, shows 2n♂=7, 2n ♀=8 chromosomes, which are similar to those of true earwigs (Forficulina).
Abstract: The parasitic insect Hemimerus bouvieri, of rather uncertain systematic position but probably an aberrant member of the order Dermaptera, shows 2n ♂=7, 2n ♀=8. The chromosomes appear to be holocentric. There is an X1X2Y sex chromosome mechanism in the male, and a sex-trivalent is formed at meiosis. The two autosomal bivalents seem to be chiasmate and the members of the sex-trivalent may also be held together by chiasmata, but this is uncertain. In general, these cytological features are similar to those of true earwigs (Forficulina).
13 citations
TL;DR: The parasitic insect Arixenia esau, a highly aberrant member of the order Dermaptera, shows n♂ = 30 and has an XY sex determining mechanism, which is compared with those of the earwigs and of Hemimerus bouvieri.
Abstract: The parasitic insect Arixenia esau, a highly aberrant member of the order Dermaptera, shows n♂ = 30 and has an XY sex determining mechanism. This karyotype is compared with those of the earwigs (Forficulina) and of Hemimerus bouvieri, a member of another aberrant parasitic suborder of the Dermaptera.
11 citations
TL;DR: Results indicate that the epizoic Hemimerus is not sister to the remaining Dermaptera, but rather nested as sister to Forficulidae + Chelisochidae, and support the paraphyly of Pygidicranidae and Spongiphoridae and the monophyly of Chelisoch Families, ForfICulidae, Anisolabididae and Labiduridae.
Abstract: . Dermaptera (earwigs) is a cosmopolitan order of insects, the phylogenetic relationships of which are poorly understood. The phylogeny of Dermaptera was inferred from large subunit ribosomal (28S), small subunit ribosomal (18S), histone-3 (H3) nuclear DNA sequences, and forty-three morphological characters. Sequence data were collected for thirty-two earwig exemplar taxa representing eight families in two suborders: Hemimeridae (suborder Hemimerina); Pygidicranidae, Anisolabididae, Labiduridae, Apachyidae, Spongiphoridae, Chelisochidae and Forficulidae (suborder Forficulina). Eighteen taxa from ten additional orders were also included, representing Ephemeroptera, Odonata, Orthoptera, Phasmida, Embiidina, Mantodea, Isoptera, Blattaria, Grylloblattodea and Zoraptera. These data were analysed via direct optimization in poy under a range of gap and substitution values to test the sensitivity of the data to variations in parameter values. These results indicate that the epizoic Hemimerus is not sister to the remaining Dermaptera, but rather nested as sister to Forficulidae + Chelisochidae. These analyses support the paraphyly of Pygidicranidae and Spongiphoridae and the monophyly of Chelisochidae, Forficulidae, Anisolabididae and Labiduridae.
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2005 | 1 |
| 1972 | 1 |
| 1971 | 1 |
| 1962 | 1 |