Phalangopsinae

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 : 107

Phalangopsinae

Both genera of Phalangopsinae showed karyotypes with a high difference in chromosome number, with E. meridionalis and E. septentrionalis with 2n = 11♁ and 2n = 14♀, respectively, while E. onthophagus presented 2n = 19♁ ( Figs 12–14 ). These species showed the X0♁-XX ♀ sex-determining system, with the X chromosome metacentric, little smaller than the bivalents of the pair 1 ( Tab. 2 ).

The karyotype of E. onthophagus is symmetrical, with FN = 36, composed of three metacentrics pairs (1, 7 and 8), and six submetacentrics pairs (2, 3, 4, 5, 6 and 9) ( Fig. 12 , Tabs 1–2). The karyotype of E. meridionalis is symmetrical, with FN = 20, including all M/SM chromosomes, while E. septentrionalis is irregular, as it has two pairs of acrocentric (5 and 6), but with a small difference in size when compared to pairs 1, 2, 3 and 4, all of them M/SMs ( Figs 13–14 , Tabs 1–2).

Figures

FIGURES 12–14. Habitus and karyotype of Phalangopsinae species. 12, Endecous (Notendecous) onthophagus, 2n = 20, XX♀; 13, Eidmanacris meridionalis, 2n = 12, XX♀; 14, Eidmanacris septentrionalis, 2n = 14, XX♀. Photography 12, 13 by Edison Zefa, 14 by Luciano de Pinho Martins.