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Ecology, acoustics and chromosomes of the East African genus Afroanthracites Hemp & Ingrisch (Orthoptera, Tettigoniidae, Conocephalinae, Agraeciini) with the description of new species

Title data

Hemp, Claudia ; Heller, Klaus-Gerhard ; Warchałowska-Śliwa, Elżbieta ; Grzywacz, Beata ; Hemp, Andreas:
Ecology, acoustics and chromosomes of the East African genus Afroanthracites Hemp & Ingrisch (Orthoptera, Tettigoniidae, Conocephalinae, Agraeciini) with the description of new species.
In: Organisms Diversity & Evolution. Vol. 15 (2015) Issue 2 . - pp. 351-368.
ISSN 1618-1077
DOI: https://doi.org/10.1007/s13127-014-0194-2

Abstract in another language

The flightless Agraeciini genus Afroanthracites, a genus restricted to East Africa, is reviewed and two newspecies are described. Exemplary for the genus Afroanthracites, the ecological niche of Afroanthracitesmontium from Mt Kilimanjaro is defined. A. montium occupieshabitats in humid and perhumid conditions and thus shows a broad altitudinal range (1250–2700 m). Concerning the acoustic communication, it is remarkable that within the micropterous genus a trend to low carrier frequencies is observedcombined with the evolution of larger stridulatory organs (mirror; resonating part of tegmen). This trend startswith species using the same ultrasonic frequencies as a brachypterousout-group and ends with species presenting clearly audible songs. Cytogenetic data are given for fiveAfroanthracites and one Afroagraecia species. Differences in chromosome numbers Afroanthracites 2n=29 andAfroagraecia 2n=27 as well as a number of major rDNA clusters (one and two, respectively) are probably useful markers to separate both genera. It is discussed whether theAfrican species evolved from a species with a presumably derived karyotype (e.g. 27 or 29 chromosomes) or if the proposed reduction of chromosome number occurred independently in Africa, Asia and Australia. The data set suggests that the African Agraeciini is of monophyletic origin, with a common ancestor of Afroagraecia and Afroanthracites in Africa. The Afroanthracites species can be divided into three groups on base of their morphology and colour pattern.Species of adjacent areas are morphologically sister groups.The most derived forms as seen in their morphology and acoustics are found in the West Usambara Mountains, part of the geologically old Eastern Arc Mountains.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Animal Ecology II - Evolutionary Animal Ecology
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 22 Jan 2020 13:21
Last Modified: 22 Jan 2020 13:21
URI: https://eref.uni-bayreuth.de/id/eprint/54024