Identification key for known species of Extraordinarius

1 Males .............................................................................................. 2

- Females............................................................................................ 6

2(1) Palpal tibia with one prolateral spine (Rheims 2019: figs 19, 34, 45, 59); RTA single (Rheims 2019: figs 21, 36, 47, 61); MA arising from tegulum between 5−5:30 o’clock (Rheims 2019: figs 20, 35, 46, 60).................................. 3

‑ Palpal tibia with three prolateral spines (Fig. 11); RTA bifid (Fig. 13); MA arising from tegulum at 4 o’clock (Fig. 12)..................................................................................... E. alicecooperi spec. nov.

3(2) MA single, hook‑shaped (Rheims 2019: figs 20, 46, 60); TBC triangular (Rheims 2019: figs 20,46) or cave‑like (Rheims 2019: fig. 60)............................................................................................. 4

‑ MA bifid; TBC strongly indented (Rheims 2019: fig. 35)....................................... E. brucedickinsoni

4(3) VTA triangular in ventral view; TBC triangular; MA 1.5−2 times longer than wide (Rheims 2019: figs 20, 60)........... 5

‑ VTA rounded in ventral view; TBC cave‑like; MA slightly over 3 times longer than wide (Rheims 2019: fig. 60) E. rickalleni

5(4) RTA distinctly bent at a 90° angle, in retrolateral view (Rheims 2019: fig. 21); MA with the same width throughout (Rheims 2019: fig. 20)............................................................................. E. andrematosi

‑ RTA straight in retrolateral view (Rheims 2019: fig. 47); MA with a widened base (Rheims 2019: fig. 46) E. klausmeinei

6(1) MS with anterior scape (Fig. 24; Rheims 2019: figs 22, 37).................................................... 7

‑ MS without anterior scape (Figs 14, 21; Rheims 2019: fig. 62)................................................. 9

7(6) anterior base of MS scape slender, less than one third scape width (Fig. 24; Rheims 2019: fig. 22)..................... 8

- anterior base of MS scape wide, more than half scape width (Rheims 2019: fig. 37).................. E. brucedickinsoni

8(7) LL strongly converging, reaching lateral margins of anterior base of scape, MS smooth, wider than long (Rheims 2019: fig. 22)..................................................................................... E. andrematosi

‑ LL gently converging, running almost parallel to anterior base of scape; MS grooved, as wide as long (Fig. 24).......... E. klausmeinei

9(6) LL straight, roughly parallel or converging anteriorly; MS roughly 1.5 times wider than long (Fig. 21; Rheims 2019: fig. 62)................................................................................................... 10

‑ LL medially projecting over MS; MS as wide as long, roughly an inverted T‑shape (Fig. 14)...... E. alicecooperi spec. nov.

10(9) MS roughly rectangular (Fig. 21); packed structures on each side running mostly parallel to one another (Figs. 23−24).................................................................................... E. angusyoungi spec. nov.

‑ MS roughly oval (Rheims 2019: fig. 62); packed structures on each side strongly converging towards one another (Rheims 2019: figs 63−64)........................................................................... E. rickalleni