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 (see below for synonymy)
    |    |--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 clavataN07]
    |    |--A. c. clavataS04
    |    `--A. c. sextiana (Lions 1966) [=Rhysotritia clavata sextiana; incl. R. riezuae Moreno & Moraza 1994]S04
    |--A. comteae (Mahunka 1983)N06 (see below for synonymy)
    |--A. corletti (Mahunka 2000) [=Rhysotritia corletti]S04
    |--A. curticephala (Jacot 1938)S04 (see below for synonymy)
    |--A. diaphoros (Niedbała 2002) [=Rhysotritia diaphoros]S04
    |--A. dikra (Niedbała & Schatz 1996)S04 [=Rhysotritia dikraN07]
    |--A. dinota (Niedbała & Schatz 1996) [=Rhysotritia dinota]S04
    |--A. divida (Mahunka 1991) [=Rhysotritia divida]S04
    |--A. dixa (Niedbała & Schatz 1996)S04 [=Rhysotritia dixaN07]
    |--A. duplicata (Grandjean 1953)S04 [=Pseudotritia duplicataS04, Rhysotritia duplicataBB92b]
    |    |--A. d. duplicataS04
    |    `--A. d. limbata (Märkel & Meyer 1959)S04 [=Rhysotritia duplicata limbataS04, Pseudotritia duplicata limbataMM59]
    |--A. ejuncida (Niedbała & Schatz 1996)S04 [=Rhysotritia ejuncidaN07]
    |--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 [incl. Rhysotritia penicillata Mahunka 1982 non R. ardua penicillata Pérez-Íñigo 1969]S04
    |--A. lentula (Koch 1841) (n. d.) [=Tritia lentula]S04
    |--A. loricata (Rathke 1799) (n. d.)S04 [=Trombidium loricatumS04, Oribotritia loricataMM59, Pseudotritia loricataS59]
    |--‘Rhysotritia’ meristos Niedbała 2003N07
    |--A. monodactyla (Niedbała 2002) [=Rhysotritia monodactyla]S04
    |--A. ornata (Niedbała 2002) [=Rhysotritia ornata]S04
    |--A. otaheitensis (Hammer 1972) [=Rhysotritia ardua otaheitensis]S04
    |--‘Rhysotritia’ paeniminaW85
    |--‘Rhysotritia’ parallelos Niedbała 2003N07
    |--A. parareticulata (Niedbała 2002) [=Rhysotritia parareticulata]S04
    |--A. peruensis (Hammer 1961)S04 [=Oribotritia peruensisS04, Rhysotritia peruensisN07]
    |--A. refracta (Niedbała 1998)S04 [=Rhysotritia refractaN07]
    |--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 rasile Mahunka 1982]S04
    |--A. spiculifera (Mahunka 1991)N06 [=A. clavata spiculiferaN06, Rhysotritia clavata spiculiferaS04]
    |--A. sterigma (Niedbała 1998) [=Rhysotritia sterigma]S04
    |--A. vestita (Berlese 1913) [=Hoploderma vestitum]S04
    |--‘Rhysotritia’ ventosus Hammer 1961N01
    `--A. wallworki (Lee 1981) [=Rhysotritia wallworki]S04

Acrotritia ardua (Koch 1841)S04 [=Hoplophora arduaS04, Hummelia arduaG32, Oribotritia arduaA80, Phthiracarus arduusM98, Pseudotritia arduaMM59, *Rhysotritia arduaBB92a, Tritia arduaA80]

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 comteae (Mahunka 1983)N06 [=Rhysotritia comteaeS04; incl. Acrotritia anchistea Niedbała 1998N06, R. anchisetaS04, A. bifurcata Niedbała 1993N06, R. bifurcataS04, R. niedbalai Balogh & Balogh 2002N06]

Acrotritia curticephala (Jacot 1938)S04 [=Pseudotritia ardua curticephalaS04, Rhysotritia curticephalaNB-P91; incl. R. lucida Niedbała 1998S04]

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

*Type species of generic name indicated


[A80] Aoki, J. 1980. A revision of the oribatid mites of Japan. II. The family Euphthiracaridae. Acta Arachnologica 29 (1): 9–24.

[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.

[MM59] Märkel, K., & I. Meyer. 1959. Zur Systematik der deutschen Euphthiracarini (Acari, Oribatei). Zoologischer Anzeiger 163: 327–342.

[M98] Michael, A. D. 1898. Oribatidae. In: H. Lohmann (ed.) Das Tierreich. Eine Zusammenstellung und Kennzeichnung der rezenten Tierformen vol. 3. Acarina pp. 1–93. R. Friedländer und Sohn: Berlin.

[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.

[N06] Niedbała, W. 2006. Supplement to the knowledge of ptyctimous mites (Acari: Oribatida) from Australian region. Annales Zoologici 56 (Suppl. 1): 99–156.

[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.

[NB-P91] Norton, R. A., & V. M. Behan-Pelletier. 1991. Calcium carbonate and calcium oxalate as cuticular hardening agents in oribatid mites (Acari: Oribatida). Canadian Journal of Zoology 69: 1504–1511.

[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.

Leave a comment

Your email address will not be published. Required fields are marked *