NEOMETRYPINI DESUTTER, 1988

Campos, Lucas Denadai De, Dias, Pedro Guilherme Barrios De Souza, Audino, Jorge Alves, Desutter-Grandcolas, Laure & Nihei, Silvio Shigueo, 2023, The fifth family of the true crickets (Insecta: Orthoptera: Ensifera: Grylloidea), Oecanthidae defin. nov.: phylogenetic relationships and divergence times, Zoological Journal of the Linnean Society 197 (4), pp. 1034-1077 : 1061-1062

TRIBE NEOMETRYPINI DESUTTER, 1988

Neometrypini Desutter, 1988:367 . Otte, 1994: 68.

Neometrypina Gorochov, 2010: 207.

Type genus: Neometrypus Desutter, 1988 .

Distribution: Neotropics, only in South America.

Diagnosis: Small to medium-sized crickets with elongated body, fusiform. Pronotum longer than wide; median projection of metanotum present, generally single ( Fig. 18B ; Supporting Information, Fig. S4E ); apterous (Supporting Information, Fig. S2A ), brachypterous (Supporting Information, Fig. S2B ) or with-developed wings ( Fig. 18A ), but without stridulatory apparatus, only with longitudinal veins; TI tympana absent. Apex of dorsal valves of ovipositor wrinkled. Male genitalia: MedLophi absent; pseudepiphallic apodeme present ( Fig. 18C ; Supporting Information, Fig. S8H ); apex of PsP bilobate; endophallic sclerite flattened dorsoventrally.

Included genera: Apterotrypa Gorochov, 2017 , defin. nov., Brazitrypa Gorochov, 2011 , Cylindrogryllus Saussure, 1878 , Dicerorostrum Gorochov, 2017 (transferred from Podoscirtinae ), Neometrypus Desutter, 1988 , Nessa Walker, 1869 (transferred from Podoscirtinae ).

Remarks: This group is re-established with the presented results corroborating its initial placement ( Desutter, 1988). There is no evidence of acoustic communication in this group. FW veins are not modified for sound production; they are reduced (brachypterous), or absent, and tympana are absent. The description of the genus Nessa seems to be remarkably similar to Brazitrypa . However, as the type species of the genus could not be examined, the genus is still considered valid, but it is transferred here from Podoscirtini to Neometrypini due to its morphological similarity with Brazitrypa and to its Neotropical distribution. A similar situation happens with Dicerorostrum , which has the characteristics of Neometrypini crickets, i.e. FWs with longitudinal veins, MedLophi of male genitalia absent, apex of PsP bilobate, endophallic sclerite flattened dorso-ventrally; it is also Neotropical in distribution. These features allow transferring Dicerorostrum from Podoscirtinae incertae sedis to Neometrypini .

According to the phylogenetic analysis results presented herein, the two subgenera of Cylindrogryllus are actually different genera, i.e. Cylindrogryllus and Apterotrypa . In the same way, the genus Neometrypus , previously considered a subgenus of Cylindrogryllus ( Gorochov, 2017) , was recently reassigned to the genus level (Campos & Souza-Dias, 2021), which is supported by our topology. The phylogenetic analysis also shows that Tafalisca bahiensis ( Saussure, 1878) belongs to the genus Brazitrypa , resulting in the new combination here proposed, Brazitrypa bahiensis ( Saussure, 1878) comb. nov. Taxonomists frequently mixed up Brazitrypa and Tafalisca identifications ( Campos & Desutter-Grandcolas, 2020) due to their similar external morphology, with longitudinal veins on FWs. The morphological characters, such as the lack of ocelli, ovipositor apex pointed, copulatory papilla triangular and flattened dorso-ventrally, separate Brazitrypa from Tafalisca and corroborate the nomenclatural act.

Figures

Figure 2. Diversity of Oecanthidae: A, Proturana subapterus, female (Euscyrtinae) (photo: Laure Desutter-Grandcolas); B, Oecanthus sp., male (Oecanthinae: Oecanthidi: Oecanthini) (photo: Marcos Fianco); C, Diatrypa sp., male (Oecanthinae: Diatrypidi) (photo: Neucir Szinwelski); D, Stenoecanthus planixiphus, male and female mating (Oecanthinae) (photo: Sylvain Hugel); E, Tafalisca hugeli, male (Tafaliscinae:Tafaliscidi) (photo: Sylvain Hugel); F, Apterotrypa mitarakensis, male (Tafaliscinae: Paroecanthidi: Neometrypini) (photo: Sylvain Hugel); G, Angustitrella sp., male (Tafaliscinae: Paroecanthidi: Paroecanthini) (photo: Pedro Souza-Dias); H, Phyllogryllus Ʋelutinus, male (Podoscirtinae: Hapithidi: Phyllogryllini) (photo: Lucas Denadai de Campos); I, Cearacesa sp., male (Podoscirtinae: Hapithidi: Cearacesaini) (photo: Lucas Denadai de Campos); J, Matuanus caledonicus, male (Podoscirtinae: Podoscirtidi: Aphonoidini) (photo: Hervé Jourdan); K, Adenopterus sp., female (Podoscirtinae:Podoscirtidi:Aphonoidini) (photo:Phillipe Grandcolas); L,Trulajlia hibinonis, male (Podoscirtinae: Podoscirtidi: Truljaliini) (photo: Masaki Ikeda, Wikipedia).

Figure 4. Distribution maps of Oecanthidae subfamilies and supertribes.

Figure 8. Diatrypa (Diatrypa) tuberculata. A, female; B, male.

Figure 18. A, Brazitrypa paulista, male; B, Cylindrogryllus pitanga, male, FWs and metanotum; C, Neometrypus badius, male genitalia, ventral view. Scales: 1 mm. Abbreviations: see Material and methods.