Paragryllinae, Desutter-Grandcolas, 1987

Timm, Vítor Falchi, Martins, Luciano De Pinho, Acosta, Riuler Corrêa, Szinwelski, Neucir, Pereira, Marcelo Ribeiro, Costa, Maria Kátia Matiotti Da & Zefa, Edison, 2021, Trends of karyotype evolution in the Neotropical long-legged crickets Phalangopsidae (Orthoptera, Grylloidea), Zootaxa 4938 (1), pp. 101-116 : 104

Paragryllinae

Individuals of U. telytokous from the Iguaçu National Park / PR, as well as from Viçosa / MG presented similar karyotypes (irregular), with 2n = 18♀, FN = 34, including three metacentric pairs (1, 2 and 3), five submetacentric pairs (4, 5, 6, 7 and 8) and an acrocentric pair (9). One or both bivalents of the pair 6 presented secondary constrictions and a large satellite ( Fig. 7 , arrow, Tabs 1–2) .

Adelosgryllus cruscastaneus and A. similis presented similar karyotypes (asymmetrical), with 2n = 17♁, FN = 20, including two pairs of large submetacentrics (1 and 2), and six pairs of small acrocentrics (3, 4, 5, 6, 7 and 8) ( Figs 9–10 , Tabs 1–2). Individuals of A. rubricephalus from the three sampled locations (Cap„o do Le„o/RS, Jaguarão/RS and Iguaçu National Park/ PR) presented the same karyotype features (asymmetrical), with 2n = 19♁, FN = 22, with the pair 1 submetacentric, and eight acrocentric pairs (2, 3, 4, 5, 6, 7, 8 and 9); one or both of the bivalents of the pair 2 presented secondary constriction, and satellites varying in size ( Figs 11 , arrow, 15, Tab. 1–2). The three species of Adelosgryllus presented the same X0♁-XX ♀ sex-determining system, with the X chromosome metacentric, similar in size to the submetacentrics pairs ( Figs 9–11 , Tab. 2 ).

Laranda meridionalis showed an irregular karyotype, with 2n = 21, X0♁-XX ♀, FN = 36, with eight pairs of M/ SM bivalents (pairs 1, 3, 4, 5, 6, 7, 8 and 10) and two acrocentric pairs (pair 2 and 9). The X chromosome is submetacentric and the largest of the complement ( Fig. 8 , Tabs 1–2) .

Figures

FIGURES 7–8. Habitus and karyotype of Paragryllinae species. 7, Ubiquepuella telytokous, 2n = 18♀, pair 6 with secondary constriction and satellite (arrow); 8, Laranda meridionalis, 2n = 22, XX♀. Photos by Edison Zefa.

FIGURES 9–11. Habitus and karyotype of Adelosgryllus’ species (Paragryllinae). 9, Adelosgryllus cruscastaneus, 2n = 18, XX♀; 10, Adelosgryllus similis, 2n = 18, XX♀; 11, Adelosgryllus rubricephalus, 2n = 20, XX♀, pair 2 present secondary con- striction and satellite (arrow). Photography 9 by Luciano de Pinho Martins, 11 by Edison Zefa.