Tenuisentidae

Tenuisentidae is a family of parasitic spiny-headed (or thorny-headed) worms. The family contains two genera, each with one species.

Tenuisentidae
Scientific classification
Kingdom: Animalia
Phylum: Acanthocephala
Class: Eoacanthocephala
Order: Neoechinorhynchida
Family: Tenuisentidae
Van Cleave, 1936

Description and taxonomy
Neoechinorhynchida
Neoechinorhynchida
Neoechinorhynchidae
 

Neoechinorhynchus crassus

 
 

Neoechinorhynchus salmonis

 
 
Tenuisentidae
 

Paratenuisentis ambiguus

 
 

Tenuisentis niloticus

 
 
 
Phylogenetic reconstruction for select species in the order Neoechinorhynchida.[1]

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Species

There are two genera, each with a single species.[2][lower-alpha 1]

Paratenuisentis Bullock and Samuel, 1975

  • Paratenuisentis ambiguus (Van Cleave, 1921)

P. ambiguus infects the European eel (Anguilla anguilla).[3]

Tenuisentis Van Cleave, 1936

T. niloticus Was found infecting the small intestine of the African arowana (Heterotis niloticus). The species name niloticus derives from the species name of the host fish, also niloticus. It has also been found in the Egyptian Nile and River Sourou at Di, Sourou Province, Burkina Faso, Sudan and Mali.[1] It has also been found in the electric catfish Malapterurus electricus Lekki Lagoon, Lagos, Nigeria.[4] The proboscis contains 16 (rarely 15) rows of hooks, each with 30–33 hooks with the average hook length per row being 1,105 um in the female and 993 um in the male. The hooks are not symmetrical in robustness dorso-ventrally but does contain similar length angles of curvature. The ventral hooks were considerably larger and more recurved than the dorsal hooks. The males have cement glands between 6.62 and 6.92 mm long. There are 86–146 nuclei.[1]

Hosts

Worms of the Tenuisentidae family exclusively parasitize fish.

Notes
  1. A binomial authority in parentheses indicates that the species was originally described in a genus other than the present genus.
  2. The species was originally named Rhadinorhynchus niloticus.[1]

References
  1. DOI 10.1007/s11230-015-9615-7|url=https://www.researchgate.net/publication/291384659_Morphological_and_molecular_description_of_Tenuisentis_niloticus_Meyer_1932_Acanthocephala_Tenuisentidae_from_Heterotis_niloticus_Cuvier_Actinopterygii_Arapaimidae_in_Burkina_Faso_with_emendation_of_t
  2. https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=198360#null
  3. J Helminthol. 2005 Mar;79(1):85-9. Accumulation of the precious metals platinum, palladium and rhodium from automobile catalytic converters in Paratenuisentis ambiguus as compared with its fish host, Anguilla anguilla. Zimmermann S1, von Bohlen A, Messerschmidt J, Sures B.PMID: 15831118 DOI: 10.1079/joh2004261
  4. Pak J Biol Sci. 2007 Feb 1;10(3):427-32. A comparative study of the parasitic helminth fauna of Gymnarchus niloticus (Gymnarchidae) and Heterotis niloticus (Osteoglossidae) from Lekki Lagoon, Lagos, Nigeria. Akinsanya B1, Hassan AA, Otubanjo OA.


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