Morphological and molecular characterisation of the entomoparasitic nematode Hammerschmidtiella diesingi (Nematoda, Oxyurida, Thelastomatidae)

A population of Hammerschmidtiella diesingi was detected in specimens of Periplaneta americana collected in Cordoba city (Argentina) was studied. Nematodes were characterized based on morphological, morphometric and genetic (D2–D3 expansion segment) analyses. New data are provided, especially on particular morphological characters that were a matter of controversy in previous studies. H. diesingi is reported in Argentina for the first time.