Nycteridocaulus attila, 2017

Mironov, Sergey V., Literak, Ivan, Sychra, Oldrich & Capek, Miroslav, 2017, Feather mites of the subfamily Proctophyllodinae (Acari: Proctophyllodidae) from passerines (Aves: Passeriformes) in Costa Rica, Zootaxa 4297 (1), pp. 1-105 : 36-37

Key to Nycteridocaulus species

(Males)

1. Opisthosomal lobes bearing long leaf-like terminal lamellae....................................................2

- Opisthosomal lobes bearing short terminal lamellae with smooth or dentate posterior margin.......................... 3

2. Apices of terminal lamellae attenuate, pregenital apodemes absent ( Figs. 34 A, B, 36A)............ N. attila Mironov sp. n.

- Apices of terminal lamellae widely rounded, pregenital apodemes fused into H-shaped sclerite...... N. foliatus Atyeo, 1966

3. Posterior margin of terminal lamellae pectinate, each with 10–12 spines; adanal shields wide and encircling anal field from anterior and lateral sides........................................................... N. pectinatus Atyeo, 1966

- Posterior margin of terminal lamellae edentate, adanal shields situated anterior to adanal suckers.......................4

4. Opisthosoma with two elongated lobes separated by large U-shaped terminal cleft about 55 µm long and 30 µm wide, setae e2 situated ventrally.................................................................. N. bilobatus Atyeo, 1966

- Opisthosoma with short and wide lobes; terminal cleft small, not longer than 30 µm, setae e2 situated dorsally............5

5. Opisthosoma widened posteriorly, with lateral semi-ovate extensions bearing bases of macrosetae h2; setae f2 and ps2 situated ventrally.............................................................................................6

- Opisthosoma slightly attenuate posteriorly, setae f2 and рs2 situated laterally......................................8

6. Width of opisthosoma at level of lateral extension bearing setae h2 subequal to its width at level of setae e2, setae h1 approximately at level of setae h2 ( Fig. 28 A, B)............................................ N. platyrinchi Mironov sp. n.

- Opisthosoma at level of lateral extension much wider than at level of setae e2 and roughly shaped as fish-tail, setae h1 situated at level of anterior end of supranal concavity................................................................7

7. Pregenital apodemes absent, setae 4a on soft tegument, terminal cleft extending to level of setae h3 ...................................................................................................... N. laticlunis Atyeo, 1966

- Pregenital apodemes present and fused into H-shaped sclerite, setae 4a on pregenital apodemes, terminal cleft extends to level of setae h2 ( Figs. 31 A, B, 33A)...................................................... N. ketourus Mironov sp. n.

8. Terminal lamellae rounded, nearly semicircular, adanal shields distant from each other..............................9

- Terminal lamellae truncated, roughly rectangular, adanal shields touching each other anterior to anal opening.......... 10

9. Entire surface of prodorsal and hysteronotal shields with large circular lacunae, genital arch almost semicircular, adanal shields represented by two pairs of sclerites, setae ps3 situated on postero-mesal pair ( Figs. 25 A, B, 27A)................................................................................................... N. hylophylax Mironov sp. n.

- Prodorsal and hysteronotal shields without ornamentation, genital arch shaped as recurved bow, adanal shields represented by one pair of postero-mesal sclerites, setae ps3 situated off adanal shields........................ N. lamellus Atyeo, 1966

10. Entire surface of prodorsal and hysteronotal shields with large circular lacunae up to 10 µm in diameter................ 11

- Hysteronotal shields with lacunae minute and sparsely distributed, prodorsal shield with the same ornamentation or without it................................................................................................... 13

11. Small pregenital apodemes shaped as small plates of irregular form present anterior to setae 4a; setae h1 situated posterior to level of setae ps2, terminal cleft not extending to level of setae h2............................. N. tyranni Atyeo, 1966

- Pregenital apodemes absent, setae h1 situated anterior to level of setae ps2, terminal cleft extending to level of setae h2 ...12

12. Adanal shields entire, thick L-shaped, anterior angles of opisthoventral shields at level of setae ps3, terminal lamellae 5–6 µm long ( Figs. 16 A, B, 18A)........................................................ N. leptopogoni Mironov sp. n.

- Antero-lateral pieces of of adanal shields connected to corresponding postero-mesal pieces by thin commissure or separated from them, anterior angles of opisthoventral shields extending distinctly beyond level of setae ps3, terminal lamellae 10–11 µm long ( Figs. 19 A, B, 21A)....................................................... N. myiobius Mironov sp. n.

13. Antero-lateral pieces of adanal shields circular, free or connected by thin commissure to corresponding postero-mesal pieces; setae 4b situated off sclerotized fields of epimerites IIIa, rudimentary sclerites rEpIIa absent ( Figs 22 A, B, 24A)......................................................................................... N. myioborus Mironov sp. n.

- Adanal shields entire, thick L-shaped, setae 4b situated on sclerotized areas around tips of epimerites IIIa, rudimentary sclerites rEpIIa present.......................................................... N. guaratubensis Hernandes, 2014

(Females; unknown in N. foliatus and N. laticlunis )

1. Lobar shield split longitudinally, terminal cleft trapezoidal, in distal portion wider than long....... N. lamellus Atyeo, 1966

- Lobar shield entire, terminal cleft longer than wide...........................................................2

2. Terminal cleft large rectangular, 40–45 µm in width ( Fig. 26 A, B)........................ N. hylophylax Mironov sp. n.

- Terminal cleft narrow, not wider than 25 µm................................................................3

3. Strongly enlarged proximal part of primary spermaduct about half the total length of spermaduct, setae h3 subequal in length to terminal appendages............................................................... N. pectinatus Atyeo, 1966

- Enlarged proximal part of primary spermaduct not longer than ¼ of its total length, setae h3 not exceeding 2/3 the length of ter- minal appendages.....................................................................................4

4. Anterior margin of lobar shield sinuous, with small and rounded median extension..................................5

- Anterior margin of lobar shield with a pair of small triangular or slit-like incisions..................................8

5. Entire surface of prodorsal and anterior hysteronotal shields with large circular lacunae up to 10 µm in diameter ( Fig. 20 A, B)............................................................................... N. myiobius Mironov sp. n.

- Prodorsal and anterior hysteronotal shields without lacunae, or scarcely distinct minute lacunae present on anterior hysterono-

tal shield........................................................................................... 6. 6. Terminal cleft approximately 2 times longer than wide at midlevel, setae h2 longer than terminal appendages................................................................................................ N. tyranni Atyeo, 1966

- Terminal cleft narrow, 4–6 times longer than wide at midlevel, setae h2 not exceeding the length of terminal appendages.. 7.

7. Primary spermaduct with short cone-shaped enlargement at head of spermatheca about 12 µm long and 6 µm wide ( Fig. 36 G).................................................................................. N. attila Mironov sp. n.

- Primary spermaduct monotonously enlarging toward the head of spermatheca ( Fig. 30 E)..... N. platyrhynchi Mironov sp. n.

8. Entire surface of prodorsal and anterior hysteronotal shields with large circular lacunae up to 10 µm in diameter ( Fig. 17 A).............................................................................. N. leptopogoni Mironov sp. n.

- Prodorsal and anterior hysteronotal shields without lacunae, or minute lacunae present on anterior hysteronotal shield..... 9.

9. Incisions in anterior margin of lobar shield narrow slit-like ( Fig. 23 A)..................... N. myioborus Mironov sp. n.

- Incisions in anterior margin of lobar shield triangular....................................................... 10.

10. Primary spermaduct monotonously enlarging toward the head of spermatheca................... N. bilobatus Atyeo, 1966

- Primary spermaduct with ampuliform enlargement at head of spermatheca approximately equal in length to secondary sperma- ducts............................................................................................. 11.

11. Epigynum extending to level of setae g, several large circular lacunae arranged in two longitudinal rows present in posterior part of anterior hysteronotal shield............................................. N. guaratubensis Hernandes, 2014

- Epigynum not extending to level of setae g, large circular lacunae on anterior hysteronotal shield absent ( Fig. 32 A, B)..................................................................................... N. ketourus Mironov sp. n.

Figures

FIGURE 16. Nycteridocaulus leptopogoni Mironov sp. n., male. A—dorsal view, B—ventral view.

FIGURE 17. Nycteridocaulus leptopogoni Mironov sp. n., female. A—dorsal view, B—ventral view.

FIGURE 19. Nycteridocaulus myiobius Mironov sp. n., male. A—dorsal view, B—ventral view.

FIGURE 20. Nycteridocaulus myiobius Mironov sp. n., female. A—dorsal view, B—ventral view.

FIGURE 22. Nycteridocaulus myioborus Mironov sp. n., male. A—dorsal view, B—ventral view.

FIGURE 23. Nycteridocaulus myioborus Mironov sp. n., female. A—dorsal view, B—ventral view.

FIGURE 25. Nycteridocaulus hylophylax Mironov sp. n., male. A—dorsal view, B—ventral view.

FIGURE 26. Nycteridocaulus hylophylax Mironov sp. n., female. A—dorsal view, B—ventral view.

FIGURE 28. Nycteridocaulus platyrinchi Mironov sp. n., male. A—dorsal view, B—ventral view.

FIGURE 30. Nycteridocaulus platyrinchi Mironov sp. n., details. A—opisthosoma of male, ventral view, B – D—legs I, II and IV of male, dorsal view, E—tibia and tarsus IV of male, ventral view, F—spermatheca and spermaducts.

FIGURE 31. Nycteridocaulus ketourus Mironov sp. n., male. A—dorsal view, B—ventral view.

FIGURE 32. Nycteridocaulus ketourus Mironov sp. n., female. A—dorsal view, B—ventral view.

FIGURE 34. Nycteridocaulus attila Mironov sp. n., male. A—dorsal view, B—ventral view.

FIGURE 36. Nycteridocaulus attila Mironov sp. n., details. A—opisthosoma of male, ventral view, B—genital apparatus of male, dorsal view, C, D—legs I and II of male, dorsal view, E—tibia and tarsus IV of male, dorsal view, F—tibia and tarsus IV of male, ventral view, G—spermatheca and spermaducts.