Allocorynina, Sharp, 1890

Tang, William, Xu, Guang, Marler, Thomas, Khuraijam, Jibankumar Singh, Singh, Rita, Lindström, Anders J., Radha, P., Rich, Stephen, Nguyen, Khang Sinh & Skelley, Paul, 2020, Beetles (Coleoptera) in cones of cycads (Cycadales) of the northern hemisphere: diversity and evolution, Insecta Mundi 2020 (781), pp. 1-19 : 4

Allocorynina weevils

The maximum likelihood (ML) tree for Allocorynina ( Fig. 1 ) exhibits a topology similar to that of the DNA tree synthesized from Bayesian inference and ML analyses produced by Tang et al. (2018b). The data set used to generate the tree here is the same, except four duplicate samples from populations already included in the data set were excluded and a different more phylogenetically diverse set of outgroup Curculionoidea was employed. This tree supports the four genera and the species proposed by O’Brien and Tang (2015) that were confirmed by phylogenetic analysis of morphological characters ( Tang et al. 2018b). As in the earlier DNA tree there is strong support for the monotypic genus Protocorynus , from Honduras on Dioon mejiae Standl. and L. O. Williams , being sister to the other genera, Notorhopalotria , Parallocorynus , and Rhopalotria . Only one lineage in the Allocorynina , genus Rhopalotria , is found on more than one host genus, living on Dioon spinulosum Dyer ex Eichler in Mexico as well as on Zamia species in Mexico, Belize, across the islands of the Greater Antilles, the Bahamas, and Florida. Rhopalotria have likely dispersed in the Caribbean on host Zamia plants that rafted between islands ( Eckenwalder 1980). The Mexican genus, Parallocorynus , is subdivided into four subgenera that have radiated only on Dioon . The Central American Notorhopalotria is found only on Zamia from Costa Rica to the Chocó of Colombia.

Figures

Figure 1. Phylogenetic tree for New World Allocorynina weevils based on maximum likelihood analysis of 16S rRNA mitochondrial gene sequences, scale bar indicates base pair substitution per nucleotides position, numbers on branches are bootstrap values.