Jan Michels
Olga Lévai
Alfred Wegener Institute for Polar and Marine Research
Bremerhaven, Bremen, Germany
Pair of fifth swimming legs of the calanoid copepod
Heterorhabdus sp. (20x)
Dr. Juan Alberto Morales
Departamento de Patología
Escuela Medicina Veterinaria
Universidad Nacional Autónoma
Heredia, Costa Rica
Acanthocephalan (parasite) eggs (400x