Studies on chevron crickets: Contribution to the knowledge of Lutosinae / ini taxa (Orthoptera: Anostostomatidae) Cadena-Castañeda, Oscar J. García, Alexander García Nos, Maria Del Pilar Castella- Sarmiento, Juan Pablo Prias Tavares, Gustavo Costa Zootaxa 2022 2022-08-29 5178 4 347 379 72PR2 Rehn, 1911 Rehn 1911 [151,520,1554,1581] Insecta Anostostomatidae Lutosa Animalia Orthoptera 18 365 Arthropoda species paranensis  ( Fig. 10) http://lsid.speciesfile.org/urn:lsid: Orthoptera.speciesfile.org:TaxonName:20061   Lutosa surdaGorochov, 2001  n. syn.   Comments.It is worth noting that in the original description of  L. paranensisonly the male is described. Unfortunately, nether the presence nor absence of the tympana in the fore tibiae nor the structures of the terminalia are mentioned. However, in an exchange of messages a few years ago with Jason Weintraub (ANSP curator), the absence of tympana to the type specimen was revealed. (This afirmation is confirmed by Tony Robillard, who very kindly sent us some additional images from the holotypein 2022). On the other hand,  L. surdais described based on a female without tympana. When comparing with both specimens and with the Morselli’s unpublished thesis (2010), we conclude that the type specimens of both species are conspecific. Morselli studied and identified males and females as  L. surda  n. syn., which fit in the morphology of  L. paranensis, the older name.   FIGURE 10.  Lutosa paranaensisfemale. A.Habitus in lateral view. B.Face. C. Head and thorax in lateral view (see the absence of tympana). D.Terminalia in dorsal view. E.Subgenital plate. F.Ovipositor in lateral view. (Photos B. Garcete). In MNHPY, there is a female ( Fig. 10) with the same data presented by Rehn (1911)in the original description of  L. paranaensis( Paraguay, Puerto Bertoni), also with the same collection number “410” as the holotypemale, which suggests that they were collected at the same time. The female examined fits the characters of  L. surda  n. syn., as occurs with the males and females studied by Morselli (2006, 2010), supporting our hypothesis of synonymy between both species. Additionally, one of the labels of the holotypeof  L. paranaensisindicates that the collector was Schrottky (Curt Schrottky (1874–1937)), a Russian entomologist who resides in South America, and was the son-in-law of Moisè Giacomo (Moisés Santiago) Bertoni (1857–1929) and brother-in law of Arnoldo de Winkelried Bertoni (1878–1973) ( Rasmussen et al., 2009), with whom he carried out the expeditions in which the specimens of  L. paranaensiswere collected, and other material sent to Rehn (published in 1911). However, they always kept specimens as backup in their personal collections. For this reason, we believe Schrottky and Bertoni only collected a male and a female of the species, and sent to Rehn only the male (now holotype), keeping with them the female studied here (B. Garcete-Barrett pers. comm.). On the other hand, the typelocality of the two species is the same, Puerto Bertoni ( Paraguay), although it has recently been recorded for northern Argentinaand Brazil( Morselli 2010, Zubarán & Braun 2018). Apparently, this species is not the only one without tympana, there are others not described with the same condition, which are distributed further north in the Atlantic Forest ( Morselli 2006, 2010).