Acrotritia sp., copyright Scott Justis.

Belongs within: Ptyctima.

Acrotritia is a cosmopolitan genus of box mites that has often been referred to by the junior synonymous name Rhysotritia (Subías 2004). The type species A. ardua is cosmopolitan in distribution; its distinctive features include a smooth dorsal surface and a gradually thickened, setulose head on the sensillus.

Characters (from Balogh & Balogh 1992a, as Rhysotritia): Interlamellar setae of normal length, originating far from bothridium. Trochanters III and IV with two setae; genu IV with at least one seta. Notogaster with V-shaped split ventrally. Plates of anogenital region fused into one pair of anogenital plates; one interlocking triangle present in middle of anogenital region; genital setae in paraxial position, in longitudinal row.

<==Acrotritia Jacot 1923 [incl. Rhysotritia Märkel & Meyer 1959] S04
    |--A. ardua (Koch 1841) S04 [=Hoplophora ardua S04, Hummelia ardua G32, *Rhysotritia ardua BB92a]
    |    |--A. a. ardua (see below for synonymy) S04
    |    |--A. a. affinis (Sergienko 1989) [=Rhysotritia ardua affinis] S04
    |    |--A. a. jinyunia (Li & Chen 1990) [=Rhysotritia ardua jinyunia] S04
    |    `--A. a. neotropicalis (Pérez-Íñigo & Baggio 1993) [=Rhysotritia ardua neotropicalis] S04
    |--A. aokii (Niedbała 2000) [=Rhysotritia aokii] S04
    |--A. bipartita (Neidbala 2000) [=Rhysotritia bipartita] S04
    |--A. brasiliana (Mahunka 1983) [=Rhysotritia brasiliana] S04
    |--A. clavata (Märkel 1964) S04 [=Rhysotritia clavata N07]
    |    |--A. c. clavata S04
    |    `--A. c. sextiana (Lions 1966) [=Rhysotritia clavata sextiana; incl. R. riezuae Moreno & Moraza 1994] S04
    |--A. corletti (Mahunka 2000) [=Rhysotritia corletti] S04
    |--A. curticephala (Jacot 1938) [=Pseudotritia ardua curticephala; incl. Rhysotritia lucida Niedbała 1998] S04
    |--A. diaphoros (Niedbała 2002) [=Rhysotritia diaphoros] S04
    |--A. dikra (Niedbała & Schatz 1996) S04 [=Rhysotritia dikra N07]
    |--A. dinota (Niedbała & Schatz 1996) [=Rhysotritia dinota] S04
    |--A. divida (Mahunka 1991) [=Rhysotritia divida] S04
    |--A. dixa (Niedbała & Schatz 1996) S04 [=Rhysotritia dixa N07]
    |--A. duplicata (Grandjean 1953) S04 [=Pseudotritia duplicata S04, Rhysotritia duplicata BB92b]
    |    |--A. d. duplicata S04
    |    `--A. d. limbata (Märkel & Meyer 1959) [=Rhysotritia duplicata limbata] S04
    |--A. ejuncida (Niedbała & Schatz 1996) S04 [=Rhysotritia ejuncida N07]
    |--A. furcata (Bayoumi & Mahunka 1979) [=Rhysotritia furcata] S04
    |--A. gracile (Niedbała 2000) [=Rhysotritia gracile] S04
    |--A. granulata (Mahunka 1999) [=Rhysotritia granulata] S04
    |--A. hallasanensis (Niedbała 2002) [=Rhysotritia hallasanensis] S04
    |--A. hyeroglyphica (Berlese 1916) (see below for synonymy) S04
    |--A. koreensis Mahunka 1997 (see below for synonymy) S04
    |--A. lentula (Koch 1841) (n. d.) [=Tritia lentula] S04
    |--A. loricata (Rathke 1799) (n. d.) S04 [=Trombidium loricatum S04, Pseudotritia loricata S59]
    |--‘Rhysotritia’ meristos Niedbała 2003 N07
    |--A. monodactyla (Niedbała 2002) [=Rhysotritia monodactyla] S04
    |--A. ornata (Niedbała 2002) [=Rhysotritia ornata] S04
    |--A. otaheitensis (Hammer 1972) [=Rhysotritia ardua otaheitensis] S04
    |--‘Rhysotritia’ paenimina W85
    |--‘Rhysotritia’ parallelos Niedbała 2003 N07
    |--A. parareticulata (Niedbała 2002) [=Rhysotritia parareticulata] S04
    |--A. peruensis (Hammer 1961) S04 [=Oribotritia peruensis S04, Rhysotritia peruensis N07]
    |--A. refracta (Niedbała 1998) S04 [=Rhysotritia refracta N07]
    |--A. reticulata (Mahunka 1988) [=Rhysotritia reticulata] S04
    |--A. rustica (Niedbała 1991) [=Rhysotritia rustica] S04
    |--A. scotti (Walker 1965) [=Rhysotritia scotti] S04
    |--A. simile (Mahunka 1982) [=Rhysotritia simile] S04
    |--A. sinensis Jacot 1923 [incl. Rhysotritia clavata spiculifera Mahunka 1991, R. rasile Mahunka 1982] S04
    |--A. sterigma (Niedbała 1998) [=Rhysotritia sterigma] S04
    |--A. vestita (Berlese 1913) (see below for synonymy) S04
    |--‘Rhysotritia’ ventosus Hammer 1961 N01
    `--A. wallworki (Lee 1981) [=Rhysotritia wallworki] S04

Acrotritia ardua ardua (Koch 1841) [incl. Phthiracarus americanus Ewing 1909, *A. americana, Hoplophora arctata Riley 1874, Pseudotritia ardua antetriheterodactylum Jacot 1933, Phthiracarus canestrinii Michael 1898, Ph. pectinatus Ewing 1917] S04

Acrotritia hyeroglyphica (Berlese 1916) [=Tritia lentula var. hyeroglyphica; incl. Rhysotritia hauseri Mahunka 1991, R. ardua penicillata Pérez-Íñigo 1969, Acrotritia sinensis triheterodactylis Jacot 1923] S04

Acrotritia koreensis Mahunka 1997 [incl. Rhysotritia penicillata Mahunka 1982 non R. ardua penicillata Pérez-Íñigo 1969] S04

Acrotritia vestita (Berlese 1913) [=Hoploderma vestitum; incl. Rhysotritia anchiseta Niedbała 1998, R. bifurcata Niedbała 1993, R. comteae Mahunka 1983, R. niedbalai Balogh & Balogh 2002] S04

*Type species of generic name indicated


[BB92a] Balogh, J., & P. Balogh. 1992a. The Oribatid Mites Genera of the World vol. 1. Hungarian Natural History Museum: Budapest.

[BB92b] Balogh, J., & P. Balogh. 1992b. The Oribatid Mites Genera of the World vol. 2. Plates. Hungarian Natural History Museum: Budapest.

[G32] Grandjean, F. 1932. La famille des Protoplophoridae (acariens). Bulletin de la Société Zoologique de France 57: 10–36.

[N01] Niedbała, W. 2001. Study of the diversity of Ptyctima (Acari: Oribatida) and quest for centres of its origin: the fauna of the Oriental and Australian regions. In: Halliday, R. B., D. E. Walter, H. C. Proctor, R. A. Norton & M. J. Colloff (eds) Acarology: Proceedings of the 10th International Congress pp. 143–148. CSIRO Publishing: Melbourne.

[N07] Niedbała, W. 2007. Ptyctimous mites (Acari, Oribatida) of Costa Rica. In: Morales-Malacara, J. B., V. M. Behan-Pelletier, E. Ueckermann, T. M. Pérez, E. G. Estrada-Venegas & M. Badii (eds) Acarology XI: Proceedings of the International Congress pp. 39–42. Instituto de Biología and Faculdad de Ciencias, Universidad Nacional Autónoma de México, Sociedad Latinoamericana de Acarología: México.

[S59] Sellnick, M. 1959. Acarina from southeastern Polynesia—II (Oribatidae). Occasional Papers of the Bernice P. Bishop Museum 22 (9): 109–152.

[S04] Subías, L. S. 2004. Listado sistemático, sinonímico y biogeográfico de los ácaros oribátidos (Acariformes, Oribatida) del mundo (1758–2002). Graellsia 60 (número extraordinario): 3–305.

[W85] Walter, D. E. 1985. The effects of litter type and elevation on colonization of mixed coniferous litterbags by oribatid mites. Pedobiologia 28: 383–387.

Last updated: 7 March 2019.

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