Pyrirhynchus

Pyrirhynchus is a genus of thorny-headed worms. It is the only genus in the order Heteramorphida and family Pyrirhynchidae. It contains a single species Pyrirhynchus heterospinus.^[1] It was found in the common sandpiper (Actitis hypoleucos) in Quang Ninh Province, Vietnam. The proboscis contains 17 to 20 rows of 17 to 19 hooks each, with anterior 9-11 hooks rooted and posterior 6-10 spines without roots.

Pyrirhynchus
Scientific classification
Kingdom:	Animalia
Phylum:	Acanthocephala
Class:	Palaeacanthocephala
Order:	Heteramorphida Amin and Ha, 2008
Family:	Pyrirhynchidae Amin and Ha, 2008
Genus:	Pyrirhynchus Amin and Ha, 2008
Species:	P. heterospinus
Binomial name
Pyrirhynchus heterospinus Amin and Ha, 2008