A new genus with a new species of cricket from mid-Cretaceous Burmese Kachin amber (Orthoptera: Trigonidiidae)

The Oldest Representatives of Tree Crickets (Orthoptera: Gryllidae; Oecanthinae) from Northern Myanmar

“…Although it is hard to observe the structures associated with climbing on the plants from these ambers, their slender thorax legs suggest that they were most likely adapted to live in vegetation close to the ground rather than to be ground-dwellers. It has already been found that Elcanidae, Trigonidiidae, Gryllidae, Mogoplistidae, Gryllotalpidae, and Tridactyllidae, in the northern Myanmar ambers [ 19 , 20 , 21 , 22 , 29 , 30 ], reflect a broad adaption of the ecological niche of orthopterans in the Myanmar amber biota.…”

“…The insects discovered from the northern Myanmar ambers are quite diverse. To date, four Grylloidea species, Protomogoplistes asquamosus Gorochov, 2010 (Mogoplistidae); Pherodactylus micromorphus Poinar, Su and Brown, 2020 (Gryllidae); Birmaninemobius hirsutus, Xu, Zhang, Jarzembowski, and Fang, 2020; and Curvospurus huzhengkun, He, 2022 (Trigonidiidae), have been described [ 6 , 20 , 21 , 22 ]. Here, we describe two new genera with two new species of Oecanthinae of Gryllidae from the mid-Cretaceous from the Hukawng Valley of Kachin Province in northern Myanmar.…”

New Cretaceous crickets of the subfamilies Nemobiinae and Podoscirtinae (Orthoptera, Grylloidea: Trigonidiidae, Oecanthidae) attest the antiquity of these clades

“…the Nemobiinae and Trigonidiinae (Desutter-Grandcolas et al 2021). In total, among the 12 fossils now listed for the Trigonidiidae, seven could be attributed to the Trigonidiinae (including Birmaninemobius hirsutus Xu et al, 2020b as a representative of its stem group, although described as a Nemobiinae), two juveniles could be attributed to the Nemobiinae, and two could not be reasonably considered; Curvospirus huzhengkun Liu et al 2022 clearly belongs to Trigonidiidae, but its morphological features do not allow it to be classified in either the Trigonidiinae, or the Nemobiinae, as it presents characters of both subfamilies in addition to original ones (Liu et al 2022). Apart from a few representatives of morphologically well-characterized clades (such as the mole crickets (Gryllotalpoidae Gryllotalpidae; see Xu et al 2022), the scaly crickets (Grylloidea Mogoplistidae Mogoplistinae; see Gorochov, 2010), the prognathous Oecanthidae Oecanthinae (see Yuan et al 2022), or very recent specimens that belong to modern genera, fossil crickets can prove quite hard to classify in relation to modern taxa, especially if they are isolated wing imprints, or, like many inclusions in Cenozoic amber, juveniles.…”

“…Recently, 11 very well-preserved fossil crickets have been discovered and described from early- to mid-Cretaceous amber of France and Myanmar. Thanks to their excellent state of preservation, these specimens have been described as precisely as extant taxa, and the presence of apomorphic characters that define the cricket clades could be checked, even if seven are juveniles (Perrichot et al 2002; Poinar et al 2020; Wang et al 2020; Xu et al 2020 a , b , 2022; Gorochov 2010; Jiang et al 2022; Liu et al 2022; Yuan et al 2022).…”

“…taxa, and the presence of apomorphic characters that define the cricket clades could be checked, even if seven are juveniles (Perrichot et al 2002;Poinar et al 2020;Wang et al 2020;Xu et al 2020aXu et al , b, 2022Gorochov 2010;Jiang et al 2022;Liu et al 2022;Yuan et al 2022).…”