A new species of Easter Egg Weevil belonging to the Pachyrhynchus speciosus group has been discovered in the forest edge of the mountains of Barangay Eureka in Gingoog City, Misamis Oriental, Philippines by a group of researchers from the University of Mindanao (UM). Pachyrhynchus panumanon sp.nov., is named after ‘Panumanon’, the guardian of the animals of the Higaonon tribe in Northern Mindanao.

The research team from UM’s Coleoptera Research Center which included Dr. Analyn Cabras, Dr. Milton Norman Medina and Dr. Reagan Joseph Villanueva together with Melbert James Baul of the Department of Health Center for Health Development – Northern Mindanao and Higaonon tribal chieftain Datu Ramil P. Ansigahan made the discovery during a recent expedition “Preliminary list of Beetles (Coleoptera) at Barangay Eureka in Gingoog City Project”.

photo by Melbert Baul

In a journal published at researchgate.net, Pachyrhynchus panumanon sp. nov. belongs to Pachyrhynchus speciosus species group. It differs from its congeners for a combination of the following characters: a) color of the body and investiture ranging from green, purple, and black, b) cross-shape scaly pronotal marks, c) unique scaly elytral marks consisting of two thick elliptical rings on basal third, two thick transverse median stripes from suture to lateral margin, and a subtriangular ring on apical third which extends from stria I to lateral margin. Other Pachyrhynchus species with cross shape pronotal marks are Pachyrhynchus davaoensis Schultze, 1934, Pachyrhynchus notocruciatus Yoshitake 2017, and Pachyrhynchus cabrasae Rukmane & Barševskis, 2016. However, P. panumanon sp. nov. differs from P. cabrasae for having three bands in the elytra whereas Pcabrasae has net-like elytral marks, and although it shares similar elytral bands with P. davaoensis and P. notocruciatus, it differs for having greenish to purple, and black body color, subglobular pronotum, and slender body with a faintly narrowed subapical constrictions. 

A-D. Pachyrhynchus panumanon sp. nov.: A-B, Holotype male; A. dorsal view, B. lateral view. C-D, Paratype female; C. dorsal view, D. lateral view
A-C. Male genitalia of Pachyrhynchus panumanon sp. nov. aedeagus in dorsal view A, idem in lateral view B, sternite IX in dorsal view C.

Photos below show the habitat of Pachyrhynchus panumanon sp.nov.

A-D. Habitat and plant associations of Pachyrhynchus panumanon sp. nov.: A) Habitat of Pachyrhynchus panumanon sp. nov. in the forest edge, B) Glochidion sp. (Phyllanthaceae) tree, C) Clethra sp. (Clethraceae), D) Glochidion sp. leaves with bite marks.
A-F. Habitus, and behavior of Pachyrhynchus panumanon sp. nov.: A) Non-banded male perching on a leaf, B) non-banded female underside the leaf, C) banded male perching on a leaf, D) banded male camouflaging with the colors of young leaves of Clethra sp., E) fully banded walking on branch, and F) fully banded clinging to the branch when lightly shaken.

According to the Journal, despite the increasing number of new achyrhynchini species in the region during the past decade, more species are still expected to be discovered in Mindanao as it remain under-documented.

Read full details in the link below.


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