Phylogenomics of Tetraopes longhorn beetles unravels their evolutionary history and biogeographic origins.

Tetraopes longhorn beetles are known for their resistance to milkweed plant toxins and their coevolutionary dynamics with milkweed plants (Asclepias). This association is considered a textbook example of coevolution, in which each species of Tetraopes is specialized to feed on one or a few species of Asclepias. A major challenge to investigating coevolutionary hypotheses and conducting molecular ecology studies lies in the limited understanding of the evolutionary history and biogeographical patterns of Tetraopes. By integrating genomic, morphological, paleontological, and geographical data, we present a robust phylogeny of Tetraopes and their relatives, using three inference methods with varying subsets of data, encompassing 2-12 thousand UCE loci. We elucidate the diversification patterns of Tetraopes species across major biogeographical regions and their colonization of the American continent. Our findings suggest that the genus originated in Central America approximately 21 million years ago during the Miocene and diversified from the Mid-Miocene to the Pleistocene. These events coincided with intense geological activity in Central America. Additionally, independent colonization events in North America occurred from the Late Miocene to the early Pleistocene, potentially contributing to the early diversification of the group. Our data suggest that a common ancestor of Tetraopini migrated into North America, likely facilitated by North Atlantic land bridges, while closely related tribes diverged in Asia and Europe during the Paleocene. Establishing a robust and densely sampled phylogeny of Tetraopes beetles provides a foundation for investigating micro- and macroevolutionary phenomena, including clinal variation, coevolution, and detoxification mechanisms in this ecologically important group.

New genus, new species and new records in Lamiinae (Coleoptera, Cerambycidae).

A new genus and three new species of the subfamily Lamiinae are described and illustrated: Osckayia oaxacae gen. nov., sp. nov. from Mexico (Oaxaca); Pseudastylopsis albus sp. nov. from Mexico (Oaxaca) and Honduras (Cortés); and Urgleptes albomaculatus sp. nov. from Mexico (Oaxaca). New country record for Acanthoderes (Acanthoderes) giesberti Chemsak Hovore, 2002 is provided.

Diversity of the longhorned beetles (Coleoptera: Cerambycidae) from Cuatro Ciénegas Basin, Coahuila, Mexico.

BACKGROUND: Cerambycidae is one the most diverse families in the order Coleoptera with more than 37,000 species described in all continents. Cerambicyd beetles have a worldwide distribution from sea level to montane sites. In Mexico, more than 1,600 species have been recorded. Nevertheless, the diversity and distribution of this family in the Mexican deserts is poorly known. NEW INFORMATION: A first checklist of Cerambycidae from seven localities of Cuatro Ciénegas Basin is presented. This study is the result of sampling carried out between 2009 to 2013. Some material from other collections is also included. The species list includes four subfamilies, 13 tribes, 32 genera and 37 species, from which 13 are new records for the state of Coahuila and three species represent new records for Mexico. These results highlight the paucity of knowledge of insects in the deserts of Mexico.

A new species of Eburia Lacordaire, 1830 (Coleoptera: Cerambycidae) from Mexico.

Eburia (Eburia) angeldiazi sp. nov. is described from Michoacán, Mexico. Distinguishing characters from closely related species are given and discussed. According to the results of our research, E. (E.) angeldiazi sp. nov. is distributed in the state of Michoacán, Mexico whereas E. (E.) macrotaenia Bates, 1880 occurs in the state of Chiapas, Mexico as well as Guatemala and El Salvador.