Ityphilus

Key to the Neotropical species of Ityphilus .

1. Internal edge of forcipular tarsungulum completely smooth.................................................... 2

- Internal edge of forcipular tarsungulum serrate.............................................................. 7

2. With 43 leg-bearing segments...................................................... I. calinus Chamberlin, 1957

- With 49 to 93 leg-bearing segments....................................................................... 3

3. With 49 to 59 leg-bearing segments....................................................................... 4

- With 71 or 93 leg-bearing segments....................................................................... 5

4. Body length up to 50 mm (female?); antennae strongly clavate; a.a. XIV wider than long; a.a. XIII with numerous type c sensilla (spine-like sensilla); mid-piece of labrum smooth; chitin-lines of forcipular coxosternite very fine and very difficult to observe; pore-fields transversely subrectangular; pore-field series present from second to antepenultimate sternite; 49 to 59, frequently 51 or 53 leg-bearing segments (sex not specified).... I. cavernicolus (Matic, Negrea & Fundora Martinez, 1977)

- Body length 18 mm (female), 9–13 mm (male); antennae moderately clavate; a.a. XIV longer than wide; a.a. XIII with ca. 2 type c sensilla (spine-like deeply colored specialized sensilla); mid-piece of labrum with a fringe of minute hair-like structures; chitin-lines of forcipular coxosternite prominent; pore-fields subcircular in shape; pore-field series present from second to fifth sternite from rear end of the body; 55 (male), 59 (female) leg-bearing segments.................. I. idanus Crabill, 1960

5. With 93 leg-bearing segments................................. I. polypus (Matic, Negrea & Fundora Martinez, 1977)

- With 71 leg-bearing segments........................................................................... 6

6. Pore-fields subcircular; cephalic plate conspicuously broader than long......................... I. lilacinus Cook 1899

- Pore-fields transversely ovoidal; cephalic plate almost as wide as long.. I. palidus (Matic, Negrea & Fundora Martinez, 1977)

7. Internal side of a.a. I with strong stout setae; coxosternite of second maxillae with a sulcus along the sagittal plane.......................................................................... I. sensibilis Pereira, Foddai & Minelli, 2000

- Internal side of a.a. I without strong stout setae; coxosternite of second maxillae without a sulcus along the sagittal plane... 8

8. 113 leg-bearing segments (female), body length 93 mm ..................................... I. grandis (Turk, 1955)

- 41 to 95 leg-bearing segments, body length 8.5 to 83 mm ...................................................... 9

9. 95 leg-bearing segments (female); body length 83 mm; sternites of posterior third of the body without pore-fields; sternite of the ultimate leg-bearing segment with 1+1 ovoid prominences on the posterior half... I. mauriesi Demange & Pereira, 1985

- 41 to 71 leg-bearing segments; body length 8.5 to 57 mm; sternites of posterior third of the body with pore-fields........ 10

10. Ventral pore-fields of anterior half of the body undivided, those of the posterior half divided in two subsymmetrical areas............................................................................. I. krausi Pereira & Minelli, 1996

- All pore-fields undivided............................................................................. 11

11. 41 or 43 leg-bearing segments.......................................................................... 12

- 47 to 71 leg-bearing segments........................................................................... 13

12. Body length of female 13 mm; female with 41 leg-bearing segments; shape of the antennae as in Figures 53, 54; a. a. XIV conspicuously longer than wide, length/width ratio ca. 1.34: 1; a.a. XIV shorter than a.a. XI–XIII taken together, ratio ca. 0.87:1; shape of type c sensilla on dorsal side of a. a. IX and XIII as in Figure 60: c; internal edge of forcipular tarsungulum expanded inwards, bearing 6–7 strong teeth occupying the middle and apical thirds (Figs. 68–70); shape of pore-fields as in Figures 71– 93; sternite 5 with ca. 34 pores, 8 (ca. 52), 17 (ca. 72), 27 (ca. 28).................................. I. bonatoi sp. nov.

- Body length of female 11 mm, male 8.5 mm; female with 43 leg-bearing segments, male with 41; shape of the antennae as in Figure 107; a.a. XIV about as wide as long; a.a. XIV longer than the a.a. XI–XIII taken together, ratio ca. 1.25:1; shape of type c sensilla on dorsal side of a. a. IX and XIII as in Figure 108: c; internal edge of forcipular tarsungulum not expanded inwards, bearing ca. 7 small teeth occupying the middle third (Fig. 109); shape of pore-fields as in Figures 110–117; sternite 5 with ca. 21 pores, 8 (ca. 30), 17 (ca. 24), 27 (ca. 9)................................................ I. donatellae Pereira, 2012

13. Sternite of leg-bearing segment 1 with pore-field........................................................... 14

- Sternite of leg-bearing segment 1 without pore-field......................................................... 16

14. Male with 63, 65, female with 67, 69 leg-bearing segments; body length 30–32 mm; antennae moderately clavate distally; chitin-lines of forcipular coxosternite complete............................ I. demoraisi Pereira, Minelli & Barbieri, 1995

- 45 to 55 leg-bearing segments........................................................................... 15

15. Body length 14 mm (female), 13 mm (male); 47, 51 and probably 49 leg-bearing segments (male), 53 and probably 49, 51 legbearing segments (female); antennae basally overlapping medially; all teeth of the dentate lamellae of mandibles similar in size; chitin-lines of forcipular coxosternite complete; pore-fields on sternites 1 to 3–4 and last three, subcircular in shape, on the remaining sternites transversely subovoidal; surface of tergites and pretergites smooth; sternite of the ultimate leg-bearing segment slightly wider than long in the female (length / width ratio ca. 0.93:1), about as long as wide in the male (length / width ratio ca. 0.97:1)....................................................................... I. geoffroyi Pereira, 2013

- Body length 23 mm (male?); 49, 55 leg-bearing segments (male?); antennae basally not overlapping medially; dentate lamellae of mandibles with about eleven teeth of which the most ventral are largest; chitin-lines of forcipular coxosternite incomplete; pore-fields in a circular area on all sternites; tergites conspicuously roughened with transverse ridges or series of short rugosities or tubercles which bear setae; sternite of the ultimate leg-bearing segment much longer than wide, length / width ratio ca. 1.28:1 (male?)................................................................... I. guianensis Chamberlin, 1921

16. Sternite of leg-bearing segment 2 without a well defined pore-field (only an isolated pore can be present); anterior edge of forcipular coxosternite deeply notched at middle; chitin-lines of forcipular coxosternite complete; ratio of maximum length to maximum width of forcipular trochanteroprefemur ca. 1.32: 1................. I. saucius Pereira, Foddai & Minelli, 2000

- Sternite of leg-bearing segment 2 with a well defined pore-field; anterior edge of forcipular coxosternite not deeply notched at middle; chitin-lines of forcipular coxosternite incomplete; ratio of maximum length to maximum width of forcipular trochant-

eroprefemur ca. 1.10–1.17:1........................................................................... 17 17. Male with 47, female with 47, 49, 51, 53 leg-bearing segments............... I. crabilli Pereira, Minelli & Barbieri, 1994

- With 61 to 71 leg-bearing segments...................................................................... 18

18. 61 (male), 63 (male, female?) leg-bearing segments; body length 17–18 mm; first maxillae without lappets; ventral pore-fields extending to antepenultimate leg-bearing segment..................................... I. perrieri (Brölemann, 1909)

- 67 (male), 71 (female) leg-bearing segments; body length 40 mm (male), 57 mm (female); first maxillary lappets present on coxosternite and telopodites; ventral pore-fields extending to penultimate leg-bearing segment...... I. betschi Pereira, 2010