Megaphasma denticrus ( Stål, 1875 )

Ghirotto, Victor Morais, Crispino, Edgar Blois, Engelking, Phillip Watzke, Neves, Pedro Alvaro Barbosa Aguiar, Góis, Júlia de & Chiquetto-Machado, Pedro Ivo, 2022, Arumatia, a new genus of Diapheromerinae stick insects (Insecta, Phasmatodea) from Brazil, with the description of five new species and a reassessment of species misplaced in Australian genera, European Journal of Taxonomy 827 (827), pp. 1-85 : 78-79

publication ID

https://doi.org/10.5852/ejt.2022.827.1849

publication LSID

lsid:zoobank.org:pub:8B6F1573-B627-4C62-94CA-DB0F1146ED2C

DOI

https://doi.org/10.5281/zenodo.6798609

persistent identifier

https://treatment.plazi.org/id/03CF87FA-8575-FF98-D43F-CBD0FA59D238

treatment provided by

Felipe

scientific name

Megaphasma denticrus ( Stål, 1875 )
status

 

Megaphasma denticrus ( Stål, 1875)

Fig. 54 View Fig

Diapheromera denticrus Stål, 1875: 73 .

Diapheromera armata Piza, 1973: 183 . Syn. nov.

Diapheromera denticrus – see Brock et al. 2022 for an extensive citation list.

Megaphasma dentricus [sic] – Caudell 1903: 572 (misspelling of “ denticrus ”).

Megaphasma denticrus – Rehn 1903: 329. (see Brock et al. 2022 for an extensive citation list)

Remarks

While analysing specimens at MELQ, the authors came across the holotype of Diapheromera armata Piza, 1973 ( Fig. 54 View Fig ) which was described based on that male, purportedly collected in the municipality of Lavras, state of Minas Gerais, Brazil. Piza, following traditional taxonomic practices at his time, usually considered slight phenotypic variations as enough evidence to propose a new species (see ChamorroRengifo & Braun 2010 and Crispino et al. 2020). Piza (1973) stated that a few differences mainly in body proportions separated D. armata from Megaphasma denticrus ( Stål, 1875) . His species, however, matches the morphology of M. denticrus described in the literature and observed in photographs of type material and additional specimens ( Caudell 1903; Brock et al. 2022), so it is here synonymized under Megaphasma denticrus ( Stål, 1875) . Phasmids belonging to Megaphasma and related genera occur only in North America. Therefore, we do not consider this doubtful record of M. denticrus from Brazil to be valid nor the lineage to have representatives native or introduced to South America. This record could be equivocal and explained by a simple mislabelling or, more unlikely, be explained by an actual event of introduction which is until now unconfirmed and lacks further evidence.

At least two other exotic phasmids were described as Brazilian species by Piza (1938): Dilophocephalus paradiacanthoides Piza, 1938 and Dixippus brasiliensis Piza, 1938 , both of which were later synonymized by Bragg (2001) under other names. The holotype of at least one of these species came from the zoological collection of the Museu Paulista which preceded the creation of the MZUSP ( Grola 2014) and went through several rearrangements and loss of information ( Chamorro-Rengifo & Braun 2010). The same could be true for the holotype of D. armata , leading to a mislabelling of the specimen.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Phasmida

Family

Diapheromeridae

Genus

Megaphasma

Loc

Megaphasma denticrus ( Stål, 1875 )

Ghirotto, Victor Morais, Crispino, Edgar Blois, Engelking, Phillip Watzke, Neves, Pedro Alvaro Barbosa Aguiar, Góis, Júlia de & Chiquetto-Machado, Pedro Ivo 2022
2022
Loc

Diapheromera denticrus

Brock et al. 2022: 78
2022
Loc

Diapheromera armata

Piza S. T. 1973: 183
1973
Loc

Megaphasma dentricus

Caudell A. N. 1903: 572
1903
Loc

Megaphasma denticrus

Rehn J. A. 1903: 329
1903
Loc

Diapheromera denticrus Stål, 1875: 73

Stal C. 1875: 73
1875