Trypanorhyncha

{{Short description|Order of flatworms}}

{{more citations needed|type=animal|date=December 2009}}

{{Automatic taxobox

|image = Parasite140092-fig3 - FIG11 Nybelinia basimegacantha body.png

|image_caption = Nybelinia basimegacantha{{cite journal|last1=Beveridge|first1=Ian|last2=Bray|first2=Rodney A.|last3=Cribb|first3=Thomas H.|last4=Justine|first4=Jean-Lou|title=Diversity of trypanorhynch metacestodes in teleost fishes from coral reefs off eastern Australia and New Caledonia|journal=Parasite|volume=21|year=2014|pages=60|issn=1776-1042|doi=10.1051/parasite/2014060|pmid= 25402635 |pmc=4234045|url=}} {{open access}}

| taxon = Trypanorhyncha

| subdivision_ranks = Suborders and families

| subdivision =

• Acystidea
• Hepatoxylidae
• Paranybeliniidae
• Sphyriocephalidae
• Tentaculariidae
• Cystidea
• Dasyrhynchidae
• Eutetrarhynchidae
• Gilquiniidae
• Gymnorhynchidae
• Hornelliellidae
• Lacistorhynchidae
• Mustelicolidae
• Otobothriidae
• Pseudogrillotiidae
• Pterobothriidae
• Rhinoptericolidae
• Tetrarhynchobothriidae

}}

Trypanorhyncha is an order of cestodes, a type of flatworm.

Some species infect gamefish, such as sciaenids, during the parasitic worm's plerocercoid stage, and are commonly called spaghetti worm because of their appearance, approximating cooked spaghetti. Such species include Poecilancistrium caryophyllum and Pseudogrillotia pleistacantha.

Their scolex, or head region, has 2 to 4 bothria, or sucking grooves that cling onto the host. They have four retractable tentacles.{{Cite journal |vauthors=Palm HW, Waeschenbach A, Olson PD, Littlewood DT |date=August 2009 |title=Molecular phylogeny and evolution of the Trypanorhyncha Diesing, 1863 (Platyhelminthes: Cestoda) |url=https://www.sciencedirect.com/science/article/pii/S1055790309000347 |journal=Molecular Phylogenetics and Evolution |language=en |volume=52 |issue=2 |pages=351–67 |doi=10.1016/j.ympev.2009.01.019 |pmid=19489123 |bibcode=2009MolPE..52..351P |issn=1055-7903|url-access=subscription }}