Systematic study of the Australian plant bug genus Xasmasoma, gen. nov. (Insecta : Heteroptera : Miridae : Orthotylinae), including host plant and biogeographic analysis, and description of twelve new species
Marina Cheng
A B and Gerasimos Cassis A
+ Author Affiliations
- Author Affiliations
A Evolution & Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
B Corresponding author. Email: marina.cheng@unsw.edu.au
Invertebrate Systematics 33(1) 1-70 https://doi.org/10.1071/IS18009
Submitted: 7 February 2018 Accepted: 22 June 2018 Published: 5 February 2019
Abstract
A new Australian genus of Orthotylini, Xasmasoma, gen. nov. is described, with 12 new included species: X. acuminatus, sp. nov., X. agana, sp. nov., X. carrollae, sp. nov., X. celiae, sp. nov., X. chamelaucieaphila, sp. nov., X. mareeba, sp. nov., X. mimae, sp. nov., X. mungallala, sp. nov., X. nillinghoo, sp. nov., X. schuhi, sp. nov., X. silveirae, sp. nov. and X. woodstocki, sp. nov. These species were analysed phylogenetically using 25 morphology-based characters and molecular alignments (COI, 16S, 18S and 28S; 2096 base pairs), with the genus found to be monophyletic based on molecular, morphological and combined analyses. An analysis of host plant associations demonstrated no pattern of co-divergence and limited phylogenetic conservatism, aside from two subclades with respective Calytrix and Myrtaceae preferences. The biogeographic analysis revealed a south-western (South-west Interzone, Western Desert) area relationship, which is in distinction to the orthotyline genus Naranjakotta. The taxonomic component includes an identification key to species and diagnostic characters are illustrated, with detailed documentation of the male genitalia, and the genus uniquely possesses tile-like texture on the apex of the apophysis of the left paramere, and a single endosomal spicule.
Additional keywords: Orthotylini, taxonomy, phylogeny, host plants, Australia.
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