Sunday, June 16, 2024

[Entomology • 2024] A Taxonomic Revision of the South American Trilobite Cockroaches of Parahormetica (Blattodea: Blaberidae), with Description of Parahormetica museunacional sp. nov. from the Atlantic Forest

Habitus of alive specimens of Parahormetica.
 [a] male of Parahormetica cicatricosa, [b] male of P. monticollis,  
[c] female Parahormetica museunacional sp. nov., [d-h] P. bilobata 
Polizeli & Pinto, 2024

The taxonomically intricate genus of trilobite cockroaches, Parahormetica Brunner von Wattenwyl, 1865, is revised based on a comparative morphological analysis. The goals of this study are to review the nomenclature, propose hypotheses about specific delimitation, and provide diagnoses to allow identification of the taxonomic units in the genus. Based on the revised status of Parahormetica, we transferred Parahormetica hylaeceps Miranda-Ribeiro, 1936, and Parahormetica punctata Saussure, 1873, to the genus Bionoblatta Rehn, 1940. Therefore, the genus includes now four species of giant cockroaches which are predominantly distributed on the Atlantic Forest: Parahormetica bilobata (Saussure, 1864), Parahormetica cicatricosa Saussure, 1869, Parahormetica monticollis (Burmeister, 1838), and Parahormetica museunacional sp. nov. (holotype male deposited in DZUP: Brazil, Paraná). Diagnoses, key, distribution maps, images of living, non-type, and type specimens are made available. Our results make clear that the status and limits among Brachycolini genera pending a full revision.

Keywords: Araucaria Forest, Blattaria, Blaberinae, New species, Systematics, Zetoborinae

Habitus of alive specimens of Parahormetica.
 a Male of Parahormetica cicatricosa, Cubatão municipality, state of São Paulo (photo C. A. M. Raposo); b male of Parahormetica monticollis, Olaria municipality, state of Minas Gerais (photo R. M. da Silva);
c female Parahormetica museunacional sp. nov., Buri municipality, state of São Paulo (photo J. H. Grau); d female of Parahormetica bilobata from Curitiba municipality, state of Paraná (photo A. P. Pinto);
e–f female of Parahormetica bilobata during the beginning (e) and end (f) of the ootheca production process (photos L. Polizeli); g–h nymphs of Parahormetica bilobata in early stadia (g; photo LP) and late stadium (h; photo A. P. Pinto)

Leonardo Polizeli and Ângelo Parise Pinto. 2024. A Taxonomic Revision of the South American Trilobite Cockroaches of Parahormetica Brunner von Wattenwyl 1865 (Blattodea: Blaberidae), with Description of Parahormetica museunacional sp. nov. from the Atlantic Forest.  Neotropical Entomology. 53, 277–303. DOI: 10.1007/s13744-024-01129-6