''Pyrirhynchus'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of thorny-headed worms. It is the only genus in the

order Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood ...

Heteramorphida and

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Pyrirhynchidae. It contains a single species ''Pyrirhynchus heterospinus''.Amin, O. M., & Van Ha, N. (2008). On a new acanthocephalan family and a new order, from birds in Vietnam. Journal of Parasitology, 94(6), 1305-1311. It was found in the

common sandpiper The common sandpiper (''Actitis hypoleucos'') is a small Palearctic wader. This bird and its Americas, American sister species, the spotted sandpiper (''A. macularia''), make up the genus ''Actitis''. They are parapatric and replace each other ge ...

(''Actitis hypoleucos'') in Quang Ninh Province,

Vietnam Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...

. 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.

References

Palaeacanthocephala Acanthocephala genera Monotypic protostome genera {{acanthocephalan-stub