A female of Eudorylaimus sp with two vulvae.

A female of Eudorylaimus sp, with two vulvae was found in Tempisque Conserv ation Area in Costa Rica. Thousands of nematodes have been prepared in Cobb 's slides to study nematode diversity in Costa Rica; nevertheless, only one aberrant female has been found. The two vulvae are very close to each othe r and vaginal sclerotization plates show abnormal formation. There is no li nkage between the uterus and the gonoducts and the ovaries are poorly devel oped. An absence of sperm and eggs suggests that the genital apparatus is n ot functional. Because identification at the species level teas not achieve d, more specimens and studies are needed.