One new and two known species of Dorylaimoides Thorne and Swanger, 1936 (Nematoda: Mydonomidae) from West Bengal, India

A few specimens of were collected from the soil around the roots of guava (Psidium guajava L.) and litchi (Litchi chinensis Sonn.) plantations in South 24-Parganas district of West Bengal, India. It yielded a few species of which one is new to science. Dorylaimoides (Dorylaimoides) geraldi sp. n. is characterized in having long odontostyle (9.5–11 μm), amphidelphic genital system in females, and by short rounded tail. The male is characterized by shorter body length, shorter spicules, and three regularly spaced ventromedian supplements with an adanal pair. Although D. (D.) geraldi sp. n. comes closer to D. (D.) buccinator D. (D.) indicus, D. (D.) parateres, D. (D.) teres and D. (D.) websteri among the didelphic-amphidelphic species of the genus having short tails, it differs in having shorter body length, longer odontostyle, amphidelphic genital system in females, absence of pars dialata in oviduct, short rounded tail and by different morphometric ratios. The male differs from the closely related species in having shorter body, different number and arrangements of ventromedian supplements, shorter spicule and tail. The known species agree well with the earlier reported specimens except some morphometric variations.