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).
Characters (from 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 1855 B05
|--H. (Halacarus) N47
| |--*H. (H.) ctenopus Gosse 1855 N47
| |--H. (H.) actenos Trouessart 1889 N47
| |--H. (H.) anomalus Trouessart 1894 N47
| |--H. (H.) frontiporus Newell 1947 N47
| |--H. (H.) oblongus Lohmann 1893 N47
| `--H. (H.) subtilis Viets 1940 N47
`--H. (Thalassarachna Packard 1871) (see below for synonymy) N47
|--H. (*T.) basteri (Johnston 1836) (see below for synonymy) N47
| |--H. b. basteri M62
| `--H. b. affinis M62
|--H. (T.) longipes (Trouessart 1888) (see below for synonymy) N47
|--‘Thalassarachna’ lubricus (Bartsch 1984) [=Halacarellus lubricus] H98
|--H. (T.) novus Lohmann 1908 SL71
|--H. (T.) procerus Viets 1927 N47
|--H. (T.) psammophilus Bartsch 1993 H98, WL09, H98 [=Thalassarachna psammophila WL09]
`--‘Thalassarachna’ raphidochela WL09
Halacarus incertae sedis:
H. abyssorum Trouessart 1896 T96
H. arenarius Bartsch 1993 H98
H. bisulcus Viets 1927 M62
H. borealis Trouessart 1894 T05
H. caudani Trouessart 1896 T96
H. celatus Bartsch 1993 H98
H. chevreuxi T96
H. discophorus Bartsch 1993 H98
H. fabricii T96
H. flavellus Bartsch 1993 H98
H. fuscatus Bartsch 1993 H98
H. gracileunguiculatus Lohmann 1908 SL71
H. gracilipes [incl. H. gracilipes var. quadricostatus Trouessart 1896] T96
H. harioti Trouessart 1889 SL71
H. helenae Bartsch 1993 H98
H. humerosus M62
|--H. h. humerosus M62
`--H. h. graveolus Monniot 1962 M62
H. longior Bartsch 1981 B05
H. mitrellus Bartsch 1993 H98
H. nitidus Bartsch 1979 L90
H. parvulus Bartsch 1993 H98
H. striatus T96
Halacarus (Thalassarachna Packard 1871) [incl. Leptopsalis Trouessart 1888 non Thorell 1882, Leptosalis (l. c.), Leptospathis Trouessart 1894] N47
Halacarus (*Thalassarachna) basteri (Johnston 1836) [=Acarus basteri, Bdella basteri, Halacarellus basteri; incl. H. spinifer Lohmann 1889, H. spiniger, Thalassarachna verrilli Packard 1871, Halacarus verrilli] N47
Halacarus (Thalassarachna) longipes (Trouessart 1888) [=*Leptopsalis longipes, Halacarellus longipes, *Leptospathis longipes; incl. Halacarus levipes Trouessart 1889, Halacarus murrayi Lohmann 1889] N47
*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.
[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.
[WL09] Walter, D. E., E. E. Lindquist, I. M. Smith, D. R. Cook & G. W. Krantz. 2009. Order Trombidiformes. In: Krantz, G. W., & D. E. Walter (eds) A Manual of Acarology 3rd ed. pp. 233–420. Texas Tech University Press.