Lutosinae, Gorochov, 1988

Cadena-Castañeda, Oscar J., García, Alexander García, Nos, Maria Del Pilar Castella-, Sarmiento, Juan Pablo Prias & Tavares, Gustavo Costa, 2022, Studies on chevron crickets: Contribution to the knowledge of Lutosinae / ini taxa (Orthoptera: Anostostomatidae), Zootaxa 5178 (4), pp. 347-379 : 376

Lutosinae / Lutosini

It is necessary to define the subfamily or tribe Lutosinae /ini. But, for this, it is necessary to have additional specimens from other nearby groups to corroborate the affiliation and define additional characters to those provided by Gorochov (2001a). For now, the Neotropical genera are the ones that should be included in Lutosini , sharing a morphology in terms of the organization of the last abdominal tergites and the hooks. These morphological characters are far different from the anatomy of the species of Old-World genera, such as Libanasa Walker, 1869 and Papuaistus Griffini, 1911 . Indeed, for us, these Old-World genera should be relocated to other suprageneric taxa in future contributions. In this way, Lutosinae /ini would have a Neotropical distribution, and be morphologically close to Anostostomatinae /ini, in contrast to the other tribes of the family.

In recent years, contributions to the different genera of American Lutosini have been made, and there is a good definition of the genera and species, with detailed data on the morphology of the terminalia and, in most cases, the internal genitalia: Apotetamenus ( Cadena-Castañeda & Cortés-Torres 2013) , Hydrolutos (contributions by Derka & Fedor), Lutosa Walker, 1869 ( Morselli 2006, 2010, Heleodoro & Mendes 2016), Neolutosa ( Gorochov 2001a) , Rhumosa ( Hugel & Desutter-Grandcolas 2018) , and Tintiyakus ( Mendes et al. 2020, Mendes & Heleodoro, 2021). Licodia is an exception, it is poorly studied, and the last contribution to the genus was made by Rehn (1930). Details of the male terminalia and internal genitalia are unknown, and additional species may need to be described from its Greater Antilles range.

In the particular case of Lutosa , more emphasis was given in this contribution, to better understand the morphology and definition of Lutosini . Its distribution was restricted to the Atlantic Forest, between Brazil, Argentina and Paraguay, but here firstly recorded to Amazon. As a result of this contribution, Lutos a remains with ten species: L. anomala , L. brasiliensis , L. cubaensis , L. goeldiana , L. imitata , L. marginalis , L. normalis , L. paranensis L. quaresmai n. sp. and L. morsellii n. sp. It is evident that many more species must be described from the Atlantic Forest, so it is important that Morselli (2010) publish his thesis and formally made available the diversity of species in the genus. We have additional species to describe, but on this occasion, we abstain from publishing or describe them, so as not to affect the magnificent work of Morselli. Here we only describe L. quaresmai n. sp. and L. morsellii n. sp., having the certainty that it does not coincide in any taxon of the author’s thesis. Outside of the Atlantic Forest, it is possible the existence of additional undescribed species. Currently representatives of these possible new species are only known from females recorded for French Guiana ( Karny 1935) or Colombian Amazon, with females from Colombian entomological collections. We prefer to wait to find males of the Amazonian or Guyanese representatives, to certify that they are Lutosa or if they are a morphologically similar genus such as Neolutosa or Rhumosa , that their females are identical to those of Lutosa .