Earliest fossil record of Corylophidae from Burmese amber and phylogeny of Corylophidae (Coleoptera: Coccinelloidea)

Abstract

The family Corylophidae is a moderately diverse coccinelloid beetle family. The fossil record of corylophid beetles is extremely sparse, with only one species formally described from the Eocene Baltic amber. Here we report a new corylophid genus and species, Xenostanus jiangkuni Li, Szawaryn & Cai gen. et sp. nov., from mid-Cretaceous amber from northern Myanmar (ca. 99 Ma). Xenostanus is most distinctly characterized by the antenna with 10 antennomeres and the presence of metaventral and abdominal postcoxal lines. Our phylogenetic analysis suggested Xenostanus as sister to tribe Stanini. Based on its distinctive morphology and the phylogenetic results, Xenostanus is placed in the tribe Xenostanini Li, Szawaryn & Cai trib. nov.

Protoliota paleus sp. nov. (Coleoptera: Silvanidae) – new long antennae beetle in mid-Cretaceous Burmese amber

“…The family Parandrexidae Kirejtshuk, 1994 is known only from the fossil state (Soriano et al 2006). Representatives of 15 families (Table 2) have been reported from mid-Cretaceous Kachin amber (Cai & Huang 2016Cai et al 2018;Jin et al 2019;Kirejtshuk & Chetverikov 2018;Kirejtshuk et al 2019;Li et al 2021aLi et al , 2021bLi et al , 2022aLi et al , 2022bLi et al , 2022cLiu et al 2018Liu et al , 2019aLiu et al , 2019bPeris & Declòs 2015;Peris & Jelínek 2019Poinar & Brown 2018;Poinar & Kirejtshuk 2008;Tihelka et al 2020Tihelka et al , 2021aTihelka et al , 2021bTomaszewska et al 2018Tomaszewska et al , 2022Wu et al 2018;Zhao et al 2022).…”

“…Liu et al (2019a) to incertae familiae in the superfamily Cucujoidea and by Kirejtshuk et al (2019) to the family Sphindidae. Xenostanus jiangkuni Li, Szawaryn et Cai, 2021(Li et al 2021b…”

Foveapeltis gen. nov., an unusual cleroid genus with large hypomeral cavities from mid‐Cretaceous amber (Coleoptera: Cleroidea)

“…For taxa with both morphological and molecular data, their interrelationships were fixed as the backbone tree. The fossil genus and other extant taxa without molecular data were allowed to move freely across the backbone tree (e.g., Li, Liu, et al., 2023 ; Li, Newton, et al., 2022 ; Li, Ślipiński, et al., 2023 ; Li, Yamamoto, et al., 2023 ; Li, Zhang, et al., 2022 ). The resulting tree was visualized with the online tool iTOL 6.6 (Letunic & Bork, 2024 ) and graphically edited with Adobe Illustrator CC 2017.…”

Kekveus brevisulcatus sp. nov., a new featherwing beetle from mid-Cretaceous amber of northern Myanmar (Coleoptera: Ptiliidae)

“…The research procedure is generally similar to that used in previous studies by the authors ( e.g. , Li et al, 2022a ; Li et al, 2022b ; Li et al, 2022c ; Li et al, 2023 ).…”