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Acanthocephala (Spiny-headed Worms or Thorny-headed Worms)

 

Class: Archiacanthocephala 

Order: Oligacanthorhynchida

Family: Oligacanthorhynchidae
Scientific Name Author/s Common Name Last Record Distribution Status Taxon Profile
Pachysentis gethi (Machado-Filho, 1950) - (rediscovered) Brazil (& Mexico?) Rediscovered? Access

 

Class: Eoacanthocephala

–No subordinate taxa

 

Class: Palaeacanthocephala

–No subordinate taxa

  

Appendix 1: Possible future additions to this list

The species Acanthogyrus barmeshoori Amin et al., 2013 was described from specimens collected from the host fish Aphanius farsicus (Farsi tooth-carp) during July 2006-June 2007. The host species is now feared extinct in the wild (Esmaeili & Freyhof, 2014).

 

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Detailed Presentation

 

Class: Archiacanthocephala

Order: Apororhynchida (1 family: Apororhynchidae; 1 genus: Apororhynchus; 7 living species)

–No subordinate taxa

 

Order: Gigantorhynchida (1 family: Giganthorhynchidae; 2 genera: Gigantorhynchus, Mediorhynchus; 64 living species)

–No subordinate taxa

 

Order: Moniliformida (1 family: Moniliformidae; 3 genera: Australiformis, Moniliformis, Promoniliformis; 20 living species)

–No subordinate taxa

 

Order: Oligacanthorhynchida (1 family; 12 genera; 96 living species)

Family: Oligacanthorhynchidae
Scientific Name Author/s Common Name Last Record Distribution Status Taxon Profile
Pachysentis gethi (Machado-Filho, 1950) - (rediscovered) Brazil (& Mexico?) Rediscovered? Access

 

Class: Eoacanthocephala

Order: Gyracanthocephala (1 family: Quadrigyridae; 9 genera; many living species)

–No subordinate taxa

 

Order: Neoechinorhynchida (3 families: Dendronucleatidae, Neoechinorhynchidae, Tenuisentidae; 20 genera; many living species)

–No subordinate taxa

 

Order: Polyacanthorhynchida (1 family: Polyacanthorhynchidae; 1 genus: Polyacanthorhynchus; 4 living species)

–No subordinate taxa

 

Class: Palaeacanthocephala

Order: Echinorhynchida (13 families; many genera; many living species)

–No subordinate taxa

 

Order: Heteramorphida (1 family: Pyrirhynchidae; 1 genus: Pyrirhynchus; 1 living species)

–No subordinate taxa

 

Order: Polymorphida (3 families: Centrorhynchidae, Plagiorhynchidae, Polymorphidae; 23 genera; many living species)

–No subordinate taxa

 

 

Statistics

Based upon c.1500 described recent species as of 2021, with around 15 new species described every year (Monks, 2021). Many more species await discovery and description, so the figures given below are subject to revision.

Conservation status Number of species
Recently extinct 0 (0%)
Missing 0 (0%)
Rediscovered 0 (0%)
Extinct in the wild 0 (0%)
Erroneously listed 0 (0%)
Uncertain status 1 (0.066%)
Invalid 0 (not applicable)

 

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