Key to Seira species with known dorsal chaetotaxy from the Western Palearctic region*

1 Abd II with 3 central mac (Fig. 11D)...................................................................... 2

- Abd II with 4 or 5 central mac (Figs 6D, 15D)............................................................... 4

2 Head mac Ps2 present (Fig. 10E); Th III with 11–14 central mac (Fig. 11B); Abd I with 5 central mac (Fig. 11C).......... 3

- Head mac Ps2 absent; Th III with 8 central mac; Abd I with 4 central mac..................................................................................... S. taeniata (Handschin, 1925) in Handschin, 1925a sensu Yoshii, 1990

3 Body all bluish (Fig. 2B); Th II with 5–3(rarely) mac in PmC group (Fig. 11 A); unguiculus with outer lamella serrated (Fig. 8F).................................................................... S. dinizi Gama, 1988 in Gama, 1988a

- Body with one transverse strip of dark blue on Abd III; Th II with 6 mac in PmC group; unguiculus with outer lamella smooth (Fig. 21F).............................................................. S. dori Gruia, Poliakov & BroZa, 2000

4 Abd II with 4 central mac, mac a3 absent (Fig. 15D).......................................................... 5

- Abd II with 5 central mac, mac a3 present (Fig. 6D)......................................................... 18

5 Abd I with 5 or less central mac (Fig. 11C)................................................................. 6

- Abd I with 6 central mac (Fig. 6C)........................................................................ 7

6 Head mac Ps2 absent; Th II with 3 medio-central mac; Abd I with 2 central mac.............. S. algira Jacquemart, 1974

- Head mac Ps2 present (Fig. 5F); Th II with 4 medio-central (m1– 1i, m2– 2i) mac (Fig. 11 A); Abd I with 5 central mac (Fig. 11C)...................................................................... S. elisae Gers & Deharveng, 1985

7 Head mac Pp5 absent.................................................................................. 8

- Head mac Pp5 present (Fig. 5F)......................................................................... 10

8 Head with 7 mac in sutural series, S 6i mac present (Fig. 5 A); Th II with 7 antero-lateral mac (Fig. 6 A).................. 9

- Head with 6 mac in sutural series, S 6i mac absent; Th II with 8 antero-lateral mac........... S. debruyni Jacquemart, 1974

9 Head with interocellar mac and Pa5 mac present; Th II with 6 mac in PmA group (Fig. 19 A)... S. agadesi Jacquemart, 1974

- Head lacking interocellar and Pa5 mac absent; Th II with 8 mac in PmA group............... S. punica Jacquemart, 1974

10 Th III with 14 central mac (Fig. 11B)..................................................................... 11

- Th III with 16 central mac...................................................... S. tongiorgii Tosi & Parisi, 1990

11 Body depigmented or with a different colour pattern; unguis apical tooth present (Fig. 21F)......................... 12

- Body black with legs yellowish (Fig. 3C); unguis apical tooth absent (Fig. 29E)........ S. barrai sp. nov. Cipola & Baquero

12 Abd IV with 4–5 antero-central and 3 postero-central mac (Fig. 20 A)........................................... 13

- Abd IV with 6 antero-central and 4 postero-central mac.................................... S. tigridica Rusek, 1981

13 Abd IV with 4 antero-central mac (Fig. 12 A)............................................................... 14

- Abd IV with 5 antero-central mac (Fig. 16 A)............................................................... 15

14 Body colour with distinct pattern, one transverse strip on Abd I–II, and anterior and posterior Abd IV................................................................................ S. maroccana Negri, Pellecchia & Fanciulli, 2005

- Body depigmented......................................................... S. vanderheydeni Jacquemart, 1974

15 Males with femur and tibiotarsi of leg I with spine-like chaetae (Fig. 21E)........................................ 16

- Males without modified chaetae in legs................................................................... 17

16 Ant IV annulated; unguis with median tooth larger than basal and apical (Fig. 21F); manubrium ventrally with 18 apical chaetae (Fig. 21G)............................................................ S. mantis Zeppelini & Bellini, 2006

- Ant IV normal; unguis with basal and median tooth subequal, both larger than apical; manubrium ventrally with 16 apical chaetae............................................................................... S. uwei Barra, 2010

17(15) Body with blue pigment on anterior and posterior margins of Th II to Abd III, all Abd IV and appendages (Fig. 2C–D);....................................................................................... S. ferrarii Parona, 1888

- Body depigmented................................................................ S. nigeri Jacquemart, 1974

18 Head mac M 4i and Pa 4 present (Fig. 22D); Th II with 7 or more medio-central (m1–2 complex) mac (Fig. 37 A); Abd I with 8–10 central mac (Fig. 37C)............................................................................ 19

- Head mac M 4i and Pa 4 absent (Fig. 31E); Th II with 6 or less medio-central (m1–2 complex) mac (Fig. 32 A); Abd I with 6 or less central mac (Fig. 32C)............................................................................. 25

19 Ant I–II normal, without modifications................................................................... 20

- Ant I –II enlarged and with scales elongated in spiral-shaped (Figs 35 A –D)............ S. burgersi sp. nov. Cipola & Arbea

20 Th III with 18 or less central mac (Fig. 23B)............................................................... 21

- Th III with 24 central mac............................................................ S. lusitanica Gama, 1964

21 Th III with 15 central mac.............................................................................. 22

- Th III with 16 or more central mac (Fig. 23B).............................................................. 24

22 Th II with 8–9 mac in PmC group....................................................................... 23

- Th II with 10 mac in PmC group................................................ S. saxatilis Gisin & Gama, 1962

23 Body color with distinct pattern, general with longitudinal strip on Th II to Abd I and transverse strips on Abd III–IV; Abd IV with 7 antero-central mac............................................................... S. dollfusi Carl, 1899

- Body dark blue, appendages yellowish; Abd IV with 7–9 antero-central mac................... S. pallidipes Reuter, 1895

24(21) Head mac Pp6 present (Fig. 22D); Th II with 11–13 mac in PmC group (Fig. 23 A).......... S. pini Jordana & Arbea, 1989

- Head mac Pp6 absent; Th II with 9 mac in PmC group........................... S. squamoornata (Scherbakov, 1898)

25 Th II with 5 or less medio-central (m1–2 complex) mac (Figs 27 A, 32 A); Abd I with 6 central mac (Fig. 27C).......... 26

- Th II with 6 medio-central (m1–2 complex) mac; Abd I with 5 central mac (Fig. 11C)......... S. insalahi Jacquemart, 1974

26 Th II with 4 medio-central mac (Fig. 6 A); Abd IV with 12 central mac (B1–2 absent) (Fig. 7 A)....................... 27

- Th II with 5 medio-central mac (Fig. 32 A); Abd IV with 14 central mac (B1–2 present) (Fig. 33 A)................................................................................................ S. betica sp. nov. Cipola & Arbea

27 Th II with 5 mac in PmC group (Fig. 19A)................................................................ 28

- Th II with 8–10 mac in PmC group, generally 9 (Fig. 6 A)............................... S. domestica (Nicolet, 1842)

28 Ant IV annulated; trochanteral organ with 20 or less spine-like chaetae; unguiculus with outer lamella serrated (Fig. 8F)... 29

- Ant IV normal; trochanteral organ with more than 30 spine-like chaetae; unguiculus with outer lamella smooth (Fig. 21F). 30

29 Body color pale, without distinct pattern, pigments restrict to Ant I–IV, part of head and legs (except tibiotarsi); Th III with 15 central mac, p1ip present......................................... S. atlantica Negri, Pellecchia & Fanciulli, 2005

- Body with two longitudinal strips on Th II to Abd I and other transversal strip on Abd III; Th III with 14 central mac, p1ip absent (Fig. 27B)................................................................... S. dagamae Dallai, 1973

30 Th II with 10 antero-lateral mac (a5 and m4 complex) and 6 mac in PmA group (Fig. 19 A)...... S. deserti Jacquemart, 1974

- Th II with 7 antero-lateral mac (a5 and m4 complex) and 7 mac in PmA group (Fig. 27 A)............ S. graeca Ellis, 1966