Hercostomus plumatus Zhang, Yang & Grootaert, 2008

Samoh, Abdulloh & Grootaert, Patrick, 2024, New species and records of the genus Hercostomus Loew (Diptera: Dolichopodidae) from Thailand mangroves, with notes on the Hercostomus fauna of Singapore mangroves, Zootaxa 5446 (2), pp. 179-204 : 195

Hercostomus plumatus Zhang, Yang & Grootaert, 2008 (New record)

( Figs 15 , 16 )

Material examined. THAILAND: Nakhon Si Thammarat Province, 10 ♂, Pak Pha Nang Bang Kong Khong (8°24’09.4”N 100°11’29.9”E), 29.IV.2015, coll. A. Samoh. Songkhla Province, 3 ♂, Chana District, Ban Nathab (7°01’25.8”N 100°43’05.0”E), sweep netting, 27.IX.2014, coll. A. Samoh. Surat Thani Province, 1 ♂, 1 ♀, Phum Riang district, Ban Nua Nam (9°23’34.0”N 99°15’24.0”E), 22.IV.2015, coll. A. Samoh. SINGAPORE: 1605 specimens have been collected in mangroves all over Singapore while nearly 500 specimens have been barcoded.

Remarks. Body length 2.4–2.7 mm, wing length 2.2–2.5 mm. First flagellomere 1.2 times as long as wide ( Zhang et al., 2008). Fore coxa yellow, mid and hind coxae brownish. Dorsal lobe of surstyli with plumose hair.

Distribution. THAILAND: Nakhon Si Thammarat, Songkhla, and Surat Thani ( Fig. 7 ).

Figures

FIGURE 7. Distribution map of the mangrove associated species of Hercostomus in Thailand.

FIGURE 15. Hercostomus plumatus Zhang, Yang & Grootaert, 2008. Male habitus. (photo Abdulloh Samoh).

FIGURE 16. Hercostomus plumatus Zhang, Yang & Grootaert, 2008. Female habitus. (photo Abdulloh Samoh).