Abstract
A new species of the genus Megoura, M. lathyricola sp. n., was collected from Lathyrus japonicus subsp. japonicus (Leguminosae) in seashore areas of northern and southern Japan. This species is described and illustrated, and a revised key to the identification of the world species of Megoura is presented.
Highlights
Megoura lespedezae (Essig and Kuwana 1918), Megoura crassicauda Mordvilko, 1919, Megoura brevipilosa Miyazaki, 1971, Megoura nigra Lee, 2002 from East Asia, Megoura dooarsis (Ghosh & Raychaudhuri, 1969) from the Indian subregion, Megoura viciae Buckton, 1876, Megoura litoralis Müller, 1952 from Europe, Central Asia and the Middle East, and Megoura stufkensi Eastop, 2011 from New Zealand. This genus is characterized by having swollen siphunculi and an association with several genera of Leguminosae (Blackman and Eastop 2006)
Three species of the genus Megoura have been reported from Japan; M. crassicauda, M. lespedezae, and M. brevipilosa
Morphological identification keys and original descriptions of Megoura spp. (Miyazaki 1971; Heie 1995; Lee et al 2002; Eastop 2011) suggest that this species is referable to M. crassicauda in Japan
Summary
The genus Megoura Buckton 1876, nested within the tribe Macrosiphini of the subfamily Aphidinae (Remaudière and Remaudière 1997), comprises eight valid species described from the Palearctic, Oriental, and Australian regions (Miyazaki 1971; Heie 1995; Blackman and Eastop 2006; Lee et al 2002; Eastop 2011). Three species of the genus Megoura have been reported from Japan; M. crassicauda, M. lespedezae, and M. brevipilosa. We collected a macrosiphine aphid species from the leguminous plant Lathyrus japonicus subsp. This species has morphological characters in common with the genus Megoura, such as swollen siphunculi, smooth head, and antenna approximately as long as body (Miyazaki 1971; Heie 1995). (Miyazaki 1971; Heie 1995; Lee et al 2002; Eastop 2011) suggest that this species is referable to M. crassicauda in Japan.
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