Order Strongylida
Order Strongylida (6+ superfamilies, 22+ families)
- Superfamily Trichostrongyloidea (10+ families)
- Family Trichostrongylidae (2+ subfamilies, 2+ genera, 9+ species)
- Subfamily Trichostrongylinae (1+ genera, 8+ species)
- Genus Trichostrongylus (8+ species)
- Trichostrongylus colubriformis
- Trichostrongylus axei
- Trichostrongylus retortaeformis
- Trichostrongylus tenuis
- Trichostrongylus vitrinus
- Trichostrongylus probolurus
- Trichostrongylus rugatus
- Trichostrongylus capricola
- Subfamily Libyostrongylinae (1+ genera, 1+ species)
- Genus Libyostrongylus (1+ species)
- Libyostrongylus douglassi
- Family Dictyocaulidae (1+ subfamilies, 1+ genera, 4+ species)
- Subfamily Dictyocaulinae (1+ genera, 4+ species)
- Genus Dictyocaulus (4+ species)
- Dictyocaulus viviparus
- Dictyocaulus filaria
- Dictyocaulus eckerti
- Dictyocaulus noerneri
- Family Amidostomatidae (1+ genera, 1+ species)
- Genus Amidostomum (1+ species)
- Family Heligmosomatidae (1+ genera, 1+ species)
- Genus Nematospiroides (1+ species)
- Family Heligmonellidae (1+ subfamilies, 1+ genera, 1+ species)
- Subfamily Nippostrongylinae (1+ genera, 1+ species)
- Genus Nippostrongylus (1+ species)
- Nippostrongylus brasiliensis
- Family Ollulanidae
- Family Dromaeostrongylidae (1+ genera, 1+ species)
- Genus Filarinema (1+ species)
- Family Strongylacanthidae
- Family Haemonchidae (2+ subfamilies, 9+ genera)
- Subfamily Haemonchinae (3+ genera)
- Genus Haemonchus (3+ species)
- Haemonchus contortus
- Haemonchus placei
- Haemonchus similis
- Genus Ashworthius (1+ species)
- Genus Mecistocirrus
- Subfamily Ostertagiinae (6+ genera, 17+ species)
- Genus Ostertagia (8+ species)
- Ostertagia ostertagi
- Ostertagia leptospicularis
- Ostertagia dikmansi
- Ostertagia lyrata
- Ostertagia mossi
- Ostertagia gruehneri
- Ostertagia arctica
- Ostertagia trifurcata
- Genus Camelostrongylus (1+ species)
- Camelostrongylus mentulatus
- Genus Mazamatongylus (1+ species)
- Genus Teladorsagia (2+ species)
- Teladorsagia circumcincta
- Teladorsagia boreoarcticus
- Genus Marshallagia (2+ species)
- Marshallagia marshalli
- Marshallagia occidentalis
- Genus Spirulopteragia (3+ species)
- Spirulopteragia asymmetrica
- Spirulopteragia spiculoptera
- Spirulopteragia quadrispiculata
- Family Cooperiidae (1+ genera, 4+ species)
- Genus Cooperia (4+ species)
- Cooperia oncophora
- Cooperia surnabada
- Cooperia curticei
- Cooperia punctata
- Superfamily Strongyloidea (4+ families, 6+ subfamilies)
- Family Strongylidae (2+ subfamilies, 8+ genera)
True Strongyles
- Subfamily Strongylinae (2+ genera, 5+ species)
- Genus Strongylus (4+ species)
- Strongylus vulgaris
- Strongylus edentatus
- Strongylus equinus
- Strongylus asini
- Genus Triodontophorus (1+ species)
- Subfamily Cyathostominae (6+ genera)
- Genus Cyathostomum (5+ species)
Small Strongyles
- Cyathostomum pateratum
- Cyathostomum labiatum
- Cyathostomum catinatum
- Cyathostomum coronatum
- Cyathostomum labratum
- Genus Cylicostephanus (6+ species)
- Cylicostephanus bidentatus
- Cylicostephanus calicatus
- Cylicostephanus goldi
- Cylicostephanus longibursatus
- Cylicostephanus minutus
- Cylicostephanus poculatis
- Genus Cylicocyclus (10+ species)
- Cylicocyclus insignis
- Cylicocyclus nassatus
- Cylicocyclus ashworthi
- Cylicocyclus leptostomus
- Cylicocyclus auriculatus
- Cylicocyclus radiatus
- Cylicocyclus insigne
- Cylicocyclus brevicapsulatus
- Cylicocyclus ultrajectinus
- Cylicocyclus elongatus
- Genus Cylicodontophorus (2+ species)
- Cylicodontophorus mettami
- Cylicodontophorus bicoronatus
- Genus Poteriostomum (2+ species)
- Poteriostomum ratzii
- Poteriostomum inparidentatum
- Genus Gyalocephalus
- Family Chabertiidae (2+ subfamilies, 2+ genera, 8+ species)
- Subfamily Chaberiinae (1+ genera, 1+ species)
- Genus Chabertia (1+ species)
- Subfamily Oesophagostominae (1+ genera, 7+ species)
- Genus Oesophagostomum (7+ species)
Nodular Worm
- Oesophagostomum radiatum
- Oesophagostomum bifurcum
- Oesophagostomum dentatum
- Oesophagostomum quadripinulatum
- Oesophagostomum venulosum
- Oesophagostomum columbianum
- Oesophagostomum stephanostomum
- Family Syngamidae (2+ subfamilies, 2+ genera)
Gapeworm
Kidney Worm
- Subfamily Stephanurinae (1+ genera)
- Subfamily Syngaminae (1+ genera)
- Genus Syngamus (1+ species)
- Family Cloacinidae (7+ genera, 11+ species)
- Genus Oesophagostomoides (1+ species)
- Oesophagostomoides longispicularis
- Genus Rugopharynx (2+ species)
- Rugopharynx australis
- Rugopharynx rosemariae
- Genus Macropostrongylus (2+ species)
- Macropostrongylus macropostrongylus
- Macropostrongylus yorkei
- Genus Cloacina (2+ species)
- Cloacina communis
- Cloacina hydriformis
- Genus Parazoniolaimus (1+ species)
- Genus Macropostongyloides (1+ species)
- Macropostongyloides baylisi
- Genus Labiostongylus (2+ species)
- Labiostongylus labiostrongylus
- Labiostongylus longispicularis
- Superfamily Ancylostomatoidea (2+ families)
- Family Ancylostomatidae (2+ subfamilies, 4+ genera, 8+ species)
Hookworm
- Subfamily Ancylostomatinae (2+ genera, 6+ species)
- Genus Ancylostoma (5+ species)
- Ancylostoma braziliense
- Ancylostoma caninum
- Ancylostoma duodenale
- Ancylostoma tubaeforme
- Ancylostoma ceylanicum
- Genus Uncinaria (1+ species)
- Subfamily Bunostominae (2+ genera, 2+ species)
- Genus Necator (1+ species)
- Genus Bunostomum (1+ species)
- Bunostomum trigonocephalum
- Family Uncinariidae
- Superfamily Metastrongyloidea (4+ families, 8+ genera)
- Family Metastrongylidae (4+ subfamilies, 8+ genera)
- Subfamily Dictyocaulinae
- Subfamily Filaroididae (2+ genera, 4+ species)
- Genus Filaroides (2+ species)
- Filaroides hirthi
- Filaroides osleri
- Genus Aelurostrongylus (2+ species)
- Aelurostrongylus abstrusus
- Aelurostrongylus vasorum
- Subfamily Metastrongylinae (1+ genera, 5+ species)
- Genus Metastrongylus (5+ species)
- Metastrongylus asymmetricus
- Metastrongylus confusus
- Metastrongylus pudendotectus
- Metastrongylus salmi
- Metastrongylus elongatus
- Subfamily Protostrongylinae
- Genus Protostrongylus (1+ species)
- Protostrongylus rufescens
- Genus Muellerius (1+ species)
- Genus Parelaphostrongylus (1+ species)
- Parelaphostrongylus tenuis
- Family Protostrongylidae (1+ subfamilies, 2+ genera)
- Subfamily Elaphostrongylinae (2+ genera)
- Genus Parelaphostrongylus
- Genus Elaphostrongylus
- Family Filaroididae (1+ genera)
- Family Angiostrongylidae (1+ genera, 1+ species)
- Genus Angiostrongylus (1+ species)
- Angiostrongylus cantonensis
- Family Crenosomatidae (1+ genera, 1+ species)
- Genus Otostrongylus (1+ species)
- Otostrongylus circumlitus
- Family Syngamidae (1+ genera, 1+ species)
- Genus Syngamus (1+ species)
- Superfamily Heligmosomidea (1+ families, 1+ genera, 1+ species)
- Family Heligmosomidae (1+ genera, 1+ species)
- Genus Ohbayashinema (1+ species)
- Superfamily Molineoidea (1+ families, 1+ subfamilies, 2+ genera, 9+ species)
- Family Molineidae (1+ subfamilies, 2+ genera, 9+ species)
- Subfamily Nematodirinae (2+ genera, 9+ species)
- Genus Nematodirus (8+ species)
- Nematodirus battus
- Nematodirus filicollis
- Nematodirus spathiger
- Nematodirus helvetianus
- Nematodirus rupicaprae
- Nematodirus oiratianus
- Nematodirus davtiani
- Nematodirus europaeus
- Genus Nematodiroides (1+ species)
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