The following are species described by my coworkers and me (in chronological order). The individual species homepages are under construction, so some links may not be functional yet.
 

Spinitectus acipenseri Choudhury and Dick, 1992. (Nematoda: Cystidicolidae).

Diclybothrium atriatum Choudhury and Dick, 1996 (Monogenea: Diclybothriidae)

Crepidostomum percopsisi Nelson, Choudhury and Dick, 1997. (Trematoda: Allocreadiidae).

Lissorchis macropharynx Choudhury and Nelson, 1998 (Trematoda: Lissorchiidae)

Spinitectus osorioi Choudhury and Perez-Ponce de Leon, 2001 (Nematoda: Cystidicolidae)

Wallinia chavarriae Choudhury, Daverdin and Brooks, 2002.
For more on this parasite, on parasites of Costa Rica, parasite homepages, and the Biodiversity Inventory efforts in Costa Rica's Area Conservacion Guanacaste, please visit the website of Dan Brooks at the University of Toronto.

Spinitectus macrospinosus Choudhury and Perryman 2003. (Nematoda: Cystidicolidae).

Auriculostoma astyanace Scholz, Aguierre-Macedo and Choudhury. 2004. (Trematoda: Allocreadiidae).