Cyclophyllidea

{{Short description|Order of flatworms}}

{{Automatic taxobox

| image = Unbewaffneter Bandwurm-drawing rotate.jpg

| image_caption = Taenia saginata

| taxon = Cyclophyllidea

| authority =

| subdivision_ranks = Families

| subdivision = See text

| synonyms = Aporidea

}}

Cyclophyllidea (the cyclophyllid cestodes) is the order of Cestoda (tapeworm). It is the largest and most diverse order of Cestoda (tapeworm), encompassing species that infect all classes of terrestrial tetrapods including humans and domesticated animals,{{Cite journal |last1=Yuan |first1=Hao |last2=Jiang |first2=Jiamei |last3=Jiménez |first3=Francisco Agustín |last4=Hoberg |first4=Eric P. |last5=Cook |first5=Joseph A. |last6=Galbreath |first6=Kurt E. |last7=Li |first7=Chenhong |date=September 2016 |title=Target gene enrichment in the cyclophyllidean cestodes, the most diverse group of tapeworms |url=https://pubmed.ncbi.nlm.nih.gov/27037792/ |journal=Molecular Ecology Resources |volume=16 |issue=5 |pages=1095–1106 |doi=10.1111/1755-0998.12532 |issn=1755-0998 |pmid=27037792}} and includes species with some of the most severe health impact on wildlife, livestock, and humans.{{cite journal | pmc=8861457 | date=2022 | last1=Wu | first1=Y. D. | last2=Dai | first2=G. D. | last3=Li | first3=L. | last4=Littlewood | first4=D. T. | last5=Ohiolei | first5=J. A. | last6=Zhang | first6=L. S. | last7=Guo | first7=A. M. | last8=Wu | first8=Y. T. | last9=Ni | first9=X. W. | last10=Shumuye | first10=N. A. | last11=Li | first11=W. H. | last12=Zhang | first12=N. Z. | last13=Fu | first13=B. Q. | last14=Fu | first14=Y. | last15=Yan | first15=H. B. | last16=Jia | first16=W. Z. | title=Expansion of Cyclophyllidea Biodiversity in Rodents of Qinghai-Tibet Plateau and the "Out of Qinghai-Tibet Plateau" Hypothesis of Cyclophyllideans | journal=Frontiers in Microbiology | volume=13 | doi=10.3389/fmicb.2022.747484 | doi-access=free | pmid=35211102 }}

All have multiple proglottid "segments", and all have four suckers on their scolices (heads), though some may have other structures, as well. Proglottids of this order have genital openings on one side (except in the Dilepididae, which have genital openings on both sides), and a compact yolk gland or vitellarium posterior to the ovary.

Families include:{{cite web|url=http://animaldiversity.org/accounts/Cyclophyllidea--Cestoda/classification/|title=Cyclophyllidea|publisher=University of Michigan}}

• Dipylidiidae, the most important member of which is Dipylidium caninum, also called the "cucumber tapeworm" or the "double-pore tapeworm"
• Hymenolepididae, including the genus Hymenolepis, a human parasite
• Taeniidae, which consists of livestock parasites in the genus Taenia and parasites that encyst in humans of the genus Echinococcus
• Anoplocephalidae, which includes several tapeworms of horses and a genus of tapeworms of ruminants, the Moniezia
• Davaineidae, which comprises 14 genera, most of which are parasites of birds
• Acoleidae, which comprises two genera that parasitize birds
• Amabiliidae, comprising four genera that parasitize aquatic birds
• Dilepididae, comprising 24 or so genera
• Diploposthidae
• Gryporhynchidae
• Nematotaeniidae
• Progynotaeniidae
• Schistotaeniidae