[Entomology • 2025] Georissus Fikaceki and G. Tsokolate • First Georissidae (Coleoptera) of the Philippines with description of two new species of Georissus Latreille, 1809

This article describes the first two Georissus species in the Philippines, namely Georissus fikaceki sp. north. of Luzon (Ilocos Norte, La Unión) and G. Tsokolato sp. north. of Bohol. The new species can be morphologically differentiated from their peers due to the patterns of abume and ridges near the frons, microscultures in the pronoto, elevations formed by intervals in the details of Elytra and Aedeagal. The thorough examination of morphology suggests that the Philippine species cannot be assigned to any of the Georissus Subgenerate, and therefore, this study suggests reviews and update of the current sub -generic classification. When corroborating morphological differences, COI-5 ‘DNA data show a high interspecific genetic distance of 17.75% between the two new species and intraespecific distances <3% for both species. This document also generates the first bar codes and a verification list of Georissus In Southeast Asia.

Keywords: DNA barcodes; new species; Filipino Biodiversity; riverside beetles

Georissus fikaceki sp. north.

G. Tsokolato sp. north.

John Windale B. Ibarra, Fernan Joseph A. Bantidio and Emmanuel D. Delocos. 2025. First Georissidae (Coleoptera) of the Philippines with description of two new species of Georissus Latreille, 1809. Tijdschrift voor entomology. 167: 45–58. DOI: doi.org/10.1163/22119434-BJA10032

#Entomology #Georissus #Fikaceki #Tsokolate #Georissidae #Coleoptera #Philippines #description #species #Georissus #Latreille

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