Halacarus

Belongs within: Halacaridae.

Halacarus is a genus of halacarid mites in which genu I is subequal in length to the adjoining femur and tibia (Luxton 1990). The North Atlantic H. anomalus is an arenicolous species with a flexible, cylindrical body (Newell 1947).

Characters (Luxton 1990): Ocular and posterior dorsal plates may be reduced or absent; anterior epimeral plates not divided into two parts; five large dorsal pores often present; palps four-segmented, penultimate segment with a spiniform seta; genu I subequal in length to femur I and tibia I, genu I with one pair of spiniform setae and tibia I with two pairs.

<==Halacarus Gosse 1855B05
    |--*H. ctenopus Gosse 1855N47
    |--H. abyssorum Trouessart 1896T96
    |--H. actenos Trouessart 1889N47
    |--H. anomalus Trouessart 1894N47
    |--H. arenarius Bartsch 1993H98
    |--H. bisulcus Viets 1927M62
    |--H. borealis Trouessart 1894T05
    |--H. caudani Trouessart 1896T96
    |--H. celatus Bartsch 1993H98
    |--H. chevreuxiT96
    |--H. discophorus Bartsch 1993H98
    |--H. fabriciiT96
    |--H. flavellus Bartsch 1993H98
    |--H. frontiporus Newell 1947N47
    |--H. fuscatus Bartsch 1993H98
    |--H. gracileunguiculatus Lohmann 1908SL71
    |--H. gracilipes [incl. H. gracilipes var. quadricostatus Trouessart 1896]T96
    |--H. harioti Trouessart 1889SL71
    |--H. helenae Bartsch 1993H98
    |--H. humerosusM62
    |    |--H. h. humerosusM62
    |    `--H. h. graveolus Monniot 1962M62
    |--H. longior Bartsch 1981B05
    |--H. mitrellus Bartsch 1993H98
    |--H. nitidus Bartsch 1979L90
    |--H. oblongus Lohmann 1893N47
    |--H. omuluiS-TK22
    |--H. parvulus Bartsch 1993H98
    |--H. striatusT96
    `--H. subtilis Viets 1940N47

*Type species of generic name indicated

References

[B05] Bartsch, I. 2005. Halacaridae from the depths of western Antarctica (Arachnida, Acari). Senckenbergiana Biologica 85 (1): 31–41.

[H98] Halliday, R. B. 1998. Mites of Australia: A checklist and bibliography. CSIRO Publishing: Collingwood.

[L90] Luxton, M. 1990. The marine littoral mites of the New Zealand region. Journal of the Royal Society of New Zealand 20 (4): 367–418.

[M62] Monniot, F. 1962. Recherches sur les graviers a Amphioxus de la région de Banyuls-sur-Mer. Vie et Milieu 13: 231–322.

[N47] Newell, I. M. 1947. A systematic and ecological study of the Halacaridae of eastern North America. Bulletin of the Bingham Oceanographic Collection 10 (3): 1–232.

[SL71] Spain, A. V., & M. Luxton. 1971. Catalog and bibliography of the Acari of the New Zealand subregion. Pacific Insects Monograph 25: 179–226.

[S-TK22] Szudarek-Trepto, N., A. Kaźmierski, A. Skoracka, M. Lewandowski & J. Dabert. 2022. Molecular phylogeny supports the monophyly of the mite supercohort Eupodides (Acariformes: Trombidiformes) and greatly coincides with traditional morphological definition of the taxon. Annales Zoologici 72 (4): 757–786.

[T05] Trägårdh, I. 1905. Monographie der arktischen Acariden. In: Römer, F., & F. Schaudinn (eds) Fauna Arctica. Eine Zusammenstellun der arktischen Tierformen, mit besonder Berücksichtigung des Spitzbergen-Gebietes auf Grund der Ergebnisse der Deutschen Expedition in das Nördliche Eismeer im Jahre 1898 vol. 4 pp. 1–78. Gustav Fischer: Jena.

[T96] Trouessart, E. 1896. Resultats scientifiques de la campagne du “Caudan” dans le Golfe de Gascogne: Halacariens. Annales de l’Universite de Lyon 26: 325–353, pls 9–11.