Biology:Haematomyzus

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Haematomyzus is a monotypic genus of lice with 3 species. The genus is placed in its own family Haematomyzidae, itself monotypic within the parvorder Rhynchophthirina (previously ranked as a superfamily).[1] These unusual lice are ectoparasites of elephants and warthogs. Their mouthparts are elongated to form a drill-like structure that allows them to penetrate the thick skin of their host.

Taxonomy

The three species, Haematomyzus elephantis (elephant louse), Haematomyzus hopkinsi (warthog louse) and Haematomyzus porci (red river hog louse) belong to a single family, the Haematomyzidae, itself the only family within Rhynchophthirina.[2][3] Rhychophthirina is a parvorder within the infraorder Phthiraptera.[4][5] A molecular phylogenetic study using subunit rRNA sequences suggests a placement of the Rhychophthirina as a sister group of the Anoplura.[6]

Below is a cladogram showing the position of Rhychophthirina within Phthiraptera:[5]

Phthiraptera
Ischnocera

Philopteridae

Anoplura

Rhynchophthirina

Trichodectera

Trichodectidae

Amblycera

Host records

H. elephantis is known from both the African and Asian Elephant in captivity but the species found in the wild are thought to have coevolved with their hosts and further study is required.[7]

Notes

The first spelling of "Rhyncophthirina" by Ferris was a lapse, and in subsequent use of the term he spelled it "Rhynchophthirina" adding the second "h". Ordinal names are not covered by the International Code of Nomenclature and thus the name and spelling comes down to a matter of personal preference. The majority of phthirapterists spell the suborder as "Rhynchophthirina" as did Hopkins and Clay, 1952,[8] and Price et al., 2003.[1]

References

  1. 1.0 1.1 Price et al. 2003, p. 466.
  2. Smith, V. S.; Broom, Y.; Dalgleish, R.. "Rhynchophthirina". https://phthiraptera.myspecies.info/category/lice/animalia/arthropoda/insecta/phthiraptera/rhynchophthirina. 
  3. Kapoor, V. C. (1985). Perspectives in Insect Systematics. New Delhi: Inter-India. p. 155. 
  4. Hopkins, H.; Johnson, K. P.; Smith, V. S.. "Rhynchophthirina Ferris, 1931". https://psocodea.speciesfile.org/otus/879870/overview. 
  5. 5.0 5.1 de Moya, Robert S; Yoshizawa, Kazunori; Walden, Kimberly K O; Sweet, Andrew D; Dietrich, Christopher H; Kevin P, Johnson (2021-06-16). Buckley, Thomas. ed. "Phylogenomics of Parasitic and Nonparasitic Lice (Insecta: Psocodea): Combining Sequence Data and Exploring Compositional Bias Solutions in Next Generation Data Sets" (in en). Systematic Biology 70 (4): 719–738. doi:10.1093/sysbio/syaa075. ISSN 1063-5157. PMID 32979270. https://academic.oup.com/sysbio/article/70/4/719/5912026. 
  6. Barker, Stephen C.; Whiting, Michael; Johnson, Kevin P.; Murrell, Anna (2003). "Phylogeny of the lice (Insecta, Phthiraptera) inferred from small subunit rRNA" (in en). Zoologica Scripta 32 (5): 407–414. doi:10.1046/j.1463-6409.2003.00120.x. ISSN 0300-3256. https://onlinelibrary.wiley.com/doi/10.1046/j.1463-6409.2003.00120.x. 
  7. Price et al. 2003, pp. 79, 396.
  8. Hopkins & Clay 1952, p. 13.

References

Template:Psocodea Wikidata ☰ Q16515986 entry