Two new species of mangrove Dolichopodidae from Bohol Island in the Philippines (Insecta: Diptera) and a checklist of the Dolichopodidae of the Philippines

During a recent survey of the insect fauna of the mangroves of the San Vicente Mangrove Forest Association (SAVIMA) Bohol, Philippines, many Diptera specimens were collected. They were pre-sorted into putative species (3% threshold) using COI sequences obtained via next-generation-sequencing ("NGS barcodes": 313bp). The sequences were then compared to a database with sequences for more than 15,000 Southeast Asian dolichopodid specimens belonging to >250 species. Sequences for two putative species were found to be new. Morphological study revealed that these species are new to science. Based on the presence of peculiar ventral bristles on the fore tibia and typical male terminalia, both belong to Thinophilus and are here newly described as Thinophilus lungosetole Ramos & Grootaert sp. nov. and Thinophilus ronazeli Ramos & Grootaert sp. nov. We provide extended diagnoses that are illustrated with stacked habitus photos, figures of the male terminalia and NGS barcodes. A checklist of all Dolichopodidae recorded in the Philippines is provided.