Wednesday, August 17, 2022

[Entomology • 2022] Pachyrhynchus panumanon • A New Species of Easter Egg Weevil (Coleoptera: Curculionidae: Entiminae: Pachyrhynchini) from Northern Mindanao, Philippines

  Pachyrhynchus panumanon Cabras & Medina, 

in Cabras, Baul, Villanueva & Medina, 2022.

A new species of easter egg weevil belonging to the Pachyrhynchus speciosus group from Misamis Oriental, Mindanao Island, Philippines is described with brief notes on its ecology and behavior. 

Keywords: biodiversity, novel species, speciosus group, taxonomy, weevils.
 Pachyrhynchus panumanon sp. nov.:
 A– B, Holotype male; A. dorsal view, B. lateral view.
C– D, Paratype female; C. dorsal view, D. lateral view.

 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.

Pachyrhynchus panumanon Cabras & Medina sp. nov.  

Diagnosis: 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 P. cabrasae 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. 

  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.

Etymology: The specific epithet is named after “Panumanon” the Higaunon god who guards the animals including insects. 

Analyn Anzano Cabras, Melbert Baul, Reagan Joseph Villanueva and Milton Norman Medina. 2022. Pachyrhynchus panumanon sp. nov., A New Species of Easter Egg Weevil (Coleoptera, Curculionidae, Entiminae, Pachyrhynchini) from Northern Mindanao, Philippines. Journal of Tropical Coleopterology. 3(1); 88 - 97. DOI: 10.53716/jtc.