Neocalcealges

Wang, Zi-Ying & Proctor, Heather, 2015, Two new feather mites of the genus Neocalcealges Orwig (Analgoidea: Trouessartiidae) from the Sichuan province of China, Zootaxa 3946 (4), pp. 567-576 : 575-576

Key to species of Neocalcealges (modified from Orwig 1968)

1. Setae e2 absent; setae d1 present or absent.................................................................. 2

- Setae e2 and d1 present................................................................................. 3

2. Setae d1 absent. Male: distance between setae g and ps 3 7–12 µm. Female: copulatory aperture located far from anterior end of supranal cleft.................................................................... N. cuspilobus Orwig, 1968

- Setae d1 present. Male: distance between setae g and ps 3 13–17 µm. Female: copulatory aperture located close to anterior end of supranal cleft................................................................... N. undulatus Orwig, 1968

3. Male: posterior margin of terminal lamellae margins smooth................................................... 4

- Male: posterior margin of terminal lamellae margins with indentations........................................... 6

4. Male: distance between setae g and ps3 20 µm or more. Female: setae h1 located anterior to end of supranal concavity, far from setae h2 ............................................................................................. 5

- Male: distance between setae g and ps3 10 µm or less. Female: setae h1 located posterior to anterior end of supranal concavity,

closed to setae h2.................................................................. N. inauditus Orwig, 1968 5. Male: distance between setae g 23–29 µm, terminal lamellae rounded. Female: distance between supranal cleft and copulatory aperture 12–18 µm............................................................... N. segregatus Orwig, 1968

- Male: distance between setae g 15–17 µm, terminal lamellae truncate. Female: distance between supranal cleft and copulatory aperture 29–33 µm................................................................. N. angustus Orwig, 1968

6. Male: terminal lamellae each with 3 or more indentations. Female with setae h1 located posterior to end of supranal cleft, close to setae h2 ........................................................................................... 7

- Male: terminal lamellae each with 2 indentations. Female with setae h1 located anterior to end of supranal cleft, far from setae h2........................................................................... N. emarginatus Orwig, 1968

7. Male: terminal lamellae each with 4–7 indentations ( Fig. 3 A). Female:distance from copulatory aperture to supranal concavity 42–57 µm ( Fig. 6 A)...................................................................... N. davidi sp. nov.

- Male: terminal lamellae each with 3 indentations ( Fig. 3 B). Female: distance from copulatory aperture to supranal concavity 62–75 µm ( Fig. 2 A).................................................................... N. chrysotis sp. nov.

Figures

FIGURE 2. Neocalcealges davidi sp. nov., female. A—dorsal view, B—ventral view, C—base of spermatheca; ca – copulatory aperture.

FIGURE 3. Neocalcealges davidi sp. nov., male. A—ventral view of opisthosoma; Neocalcealges chrysotis sp. nov., male. B—ventral view of opisthosoma.

FIGURE 6. Neocalcealges chrysotis sp. nov., female. A—dorsal view, B—ventral view, C—base of spermatheca.