Eviphididae

Mašán, Peter & Halliday, Bruce, 2010, Review of the European genera of Eviphididae (Acari: Mesostigmata) and the species occurring in Slovakia 2585, Zootaxa 2585, pp. 1-122 : 23-24

Key to the European genera of the family Eviphididae (males)

1. Palpgenu with five setae; femur II with one anterolateral seta (al 2 absent); femur III with seven setae (1-3/2-1); sterno-genital shield with four pairs of setae ..................................................................................... Thinoseius (p. 82)

- Palpgenu with six setae; femur II with two anterolateral setae (al 2 present); femur III with six setae (1-3/1-1); sternogenital shield with four or five pairs of setae................................................................................................................ 2

2. Coxa I and II each with at least one ventral seta modified into flat oval disk-like protuberance ... Scarabaspis (p. 79)

- Coxae I and II with normal setiform or spinose setae................................................................................................... 3

3. Palptarsus with two closely associated parallel macroeupathidia (as in Fig. 77); post-stigmatic section of peritrematal shields strongly expanded and elongated, with tips reaching far beyond posterior margins of coxae IV; ventral region often with small platelet or shield abutting posterior margin of sterno-genital shield................................ 4

- Palptarsus without paired macroeupathidia; post-stigmatic section of peritrematal shields short, scarcely reaching posterior margins of coxae IV; opisthogaster immediately behind sterno-genital shield never with platelet or shield, but two or four inconspicuous sclerites may be present. .............................................................................................. 6

4. Sclerotised plates behind sterno-genital shield reduced to small subrectangular platelet ( Fig. 45) or sometimes absent, never bearing a pair of ventral setae; all leg segments with typical chaetotaxy: trochanter I with six setae, femur I with four ventral setae, genu III with two ventral setae; idiosoma dorso-ventrally flattened; vertical setae j1 stout and lance-like ............................................................................................................................. Copriphis (p. 39)

- Sclerotised plates behind sterno-genital shield well developed and expanded to form a ventral shield, usually bearing at least one pair of ventral setae; some leg segments with reduced number of setae: trochanter I with five setae, femur I with three ventral setae, genu III with one ventral seta; idiosoma highly domed, almost hemispherical; vertical setae j1 minute and needle-like ............................................................................................................................... 5

5. Ventral shield usually with two pairs of ventral setae ( Figs 69–71); most leg segments with typical chaetotaxy: genu I and tibia I with three ventral setae, tibia I with five dorsal setae, genu II with eleven setae (2-5/2-2), tibia II with ten setae (2-4/2-2) ......................................................................................................................................... Eviphis (p. 53)

- Ventral shield usually with one pair of ventral setae (rarely fragmented, without ventral setae); most leg segments with reduced chaetotaxy: genu I and tibia I with two ventral setae, tibia I with four dorsal setae, genu II with nine setae (1-5/1-2), tibia II with eight setae (1-3/2-2) ................................................................................. Evimirus (p. 51)

6. Idiosoma strongly domed, with wide marginal strip of dorsal shield expanded ventrally; vertical setae j1 short and attenuate; genu I and tibia I with two ventral seta .................................................... Neocrassicheles gen. nov. (p. 63)

- Dorsal shield dorso-ventrally flattened, no part of dorsal shield expanded ventrally; vertical setae j1 long and thickened; genu I and tibia I with three ventral setae ........................................................................................................... 7

7. Dorsolateral and opisthogastric integument with seven pairs of setae (excluding st5) ( Figs 62, 164); sterno-genital shield with four or five pairs of setae; endopodal platelets III-IV may be fused to sterno-genital shield or free. ....... 8

- Dorsolateral and opisthogastric integument with at least eight pairs of setae ( Figs 22, 132); sterno-genital shield with five pairs of setae (st1–st5), endopodal platelets III-IV never free from sterno-genital shield .................................... 9

8. Endopodal platelets III-IV completely free from sterno-genital shield ( Fig. 62); anterolateral margins of epistome strongly spinose ( Fig. 54); genu II with one anterolateral seta; sterno-genital shield with four pairs of setae and reticulate pattern over whole surface ..................................................................................................... Crassicheles (p. 45)

- Endopodal platelets III-IV partly or completely fused to sterno-genital shield ( Figs 155, 164); anterolateral margins of epistome straight and smooth, without large spines ( Figs 157, 175); genu II with two anterolateral setae; sternogenital shield with four or five setae, without distinct reticulation on surface ..................................... Uroiphis (p. 84)

9. Dorsolateral and opisthogastric integument with eight pairs of setae (not including setae st5; Fig. 22); first pair of sternal pores slightly elongated, straight and transverse to body axis; anal shield subcircular ( Fig. 22) ....................... ............................................................................................................................................................... Alloseius (p. 33)

- Dorsolateral and opisthogastric integument with at least nine pairs of setae (not including st5; Fig. 132); first pair of sternal pores normal, minute, curved and oblique to body axis (at about 45°); anal shield subtriangular or suboval ( Fig. 132)..................................................................................................................................................................... 10

10. Dorsal shield setae with extreme variation in length, longest setae about 10 times as long as shortest setae ( Fig. 131) ........................................................................................................................................................... Pelethiphis (p. 68)

- Dorsal shield setae without such extreme variation in length, longest setae at most three times as long as shortest setae............................................................................................................................................................................. 11

11. Peritrematal shields developed along whole length of peritremes; anterior section of peritrematal shields completely fused to dorsal shield ( Fig. 40); setae j1 and z1 positioned dorsally; posterior dorsal shield setae subequal or only moderately varying in length .................................................................................................................. Alliphis (p. 24)

- Peritrematal shields not reaching anterior end of peritremes; peritrematal shields not fused to dorsal shield; setae j1 and z1 often displaced ventrally; posterior marginal S and Z setae on dorsal shield conspicuously longer than medial J setae (J1–J3 and J5) ................................................................................................................ Scarabacariphis (p. 77)