Lemdana latifi n. sp. (Filarioidea: Onchocercidae) from the red jungle fowl (Gallus gallus spadiceus)

Lemdana latifi n. sp. was found in connective tissues around the trachea and crop and in the body-cavity of seven of 14 Malayan red jungle fowl Gallus gallus spadiceus. The new species is described and illustrated. Morphologically it is most closely related to Lemdana pavonica and Lemdana francolini. Lemdana latifi is distinguished from the eight valid species of Lemdana by the mean spicular ratio of 1.7:1; the right spicule with a right margin 18–29% (15–31 m; mean 24 m) longer than the left margin; the distal half of the left spicule twisted and S-shaped; and the absence of unpaired papillae at tip of male tail. The new species has smaller adults, a shorter left spicule and a shorter glandular oesophagus than those of L. pavonica and a wider male, shorter spicules and a longer muscular oesophagus than those of L. francolini. The male of L. latifi is 7–9 (8.1)mm long, the left spicule 164–215 (184)m long and the right spicule 98–117 (108)m long. The female is 17–23 (21)mm in length. Sheathed microfilariae from blood smears are 78–100 m long and those from the uterus are 89–103 m long. This is the sixth valid species of Lemdana in the Phasianidae.