Endeostigmata

Taxonomy

Alycidae Canestrini & Fanzago 1877 (=Pachygnathidae Kramer 1877, Bimichaeliidae Womersley 1944Womersley 1944:
Womersley H. 1944. Australian Acarina, families Alycidae and Nanorchestidae. Transactions of the Royal Society of South Australia 68: 133–143.)

Name

Orthacarus Zachvatkin 1949

Classification

updated 2025

Superorder Acariformes » Order Sarcoptiformes » Suborder Endeostigmata » Infraorder Bimichaliida » Superfamily Alycoidea » Family Alycidae » Genus Orthacarus

Children

Orthacarus tremli Zachvatkin, 1949; O. oblongus (Halbert, 1920Halbert, 1920:
Halbert JN. 1920. The Acarina of the seashore. Proceedings of the Royal Irish Academy (Section B) 35 (7): 106–152.) Ireland (see Uusitalo ms.).

Diagnosis

Prodorsum with 2 pairs of filiform trichobothria (si, ve) and 3 pairs of setae (se, in, exp); naso and median eye absent, one pair of lateral eyes. Rutella with teeth and lobe; subcapitulum with 5 pairs of setae; chelicerae chelate-dentate, each with 1 seta. Opisthosoma hypertrichous; 3 pairs of genital papillae.

Remarks

This genus is poorly known, but is most similar to Amphialycus, which retains setae vi and a median eye (but without a distinct naso) and has 2 pairs of lateral eyes. Species of Alycus also have lost the median eye, but usually retain a vestigial naso and setae vi.

References

Halbert 1920Halbert 1920:
Halbert JN. 1920. The Acarina of the seashore. Proceedings of the Royal Irish Academy (Section B) 35 (7): 106–152.
Zakhvatkin 1949Zakhvatkin 1949:
Zakhvatkin AA. 1949. New representatives of apparently segmented mites (Acarina: Pachygnathidae). Entomologicheskoe Obozrenie 30: 291–297.

Orthacarus