Crotonia
Creators: name: Colloff, Matthew J.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Crotoniidae
Crotonia

description: Key to species of Crotonia from New Zealand (including Campbell Island)
This key applies to males and females.
1. Caudal apophyses f 1, h 1, h 2 and h 3 short, only slightly longer than wide, subequal in length, projecting dorsally from rounded caudal margin............................................................ Lanceolata group… C. brevicornuta
- With caudal apophyses not as above....................................................................... 2
2. Caudal apophyses bilaterally separated, h 2 2–5 × longer than other caudal setae.................... Cophinaria group...3
- With caudal apophyses on median stalk or, if separate, h 2 not markedly longer than others............................ 4
3. Caudal apophyses of seta h 2 long, ca. 4–5´length of that of h 1........................................ C. cophinaria
- Caudal apophyses of seta h 2 short, ca. 2´length of that of h 1....................................... C. brachyrostrum
4. Notogastral margins discrete; suprapleural suture (hyaline strip) present.......................................... 5
- Notogastral margins diffuse, suprapleural suture absent.......................................... Obtecta group…9
5. Notogastral shield narrow, sides parallel..................................................... Unguifera group…6
- Notogastral shield broad, sides convex, cuticle reticulate.............................. Flagellata group… C. reticulata
6. Suprapleural suture extending to point between setae e 2 and f 2........................................ C. cervicorna
- Suprapleural suture extending as far as seta f 2 or posterior thereof................................................ 7
7. Notogastral setae d 2-3, e 2 and f 2 relatively long; at least as long as half the distance between bases of adjacent setae................................................................................................... C. longisetosa
- Notogastral setae d 2-3, e 2 and f 2 very short; less than a quarter of the distance between bases of adjacent setae............. 8
8. Lamellar and caudal setae barbed................................................................ C. unguifera
- Lamellar and caudal setae smooth......................................................... C. ramsayi sp. nov.
9. Notogastral shield heavily tuberculate.......................................................... C. tuberculata
- Notogastral shield not heavily tuberculate................................................................. 10
10. Seta h 2 in cup-shaped apophysis.................................................................. C. cupulata
- Seta h 2 on apex of cylindrical or swollen apophysis.......................................................... 11
11. Apophysis of seta h 2 swollen apically............................................................ C. longibulba
- Apophysis of seta h 2 not swollen apically.................................................................. 12
12. Caudal apophyses on median stalk some distance from notogastral margin................................ C. caudalis
- Caudal apophyses not on median stalk, on notogastral margin........................................... C. obtecta
description: Published as part of Colloff, Matthew J., 2015, The Crotonia fauna of New Zealand revisited (Acari: Oribatida): taxonomy, phylogeny, ecological distribution and biogeography, pp. 1-29 in Zootaxa 3947 (1) on page 17, DOI: 10.11646/zootaxa.3947.1.1, http://zenodo.org/record/288324