Ityphilus

Pereira, Luis Alberto, 2013, Further contribution to the knowledge of Ityphilus calinus Chamberlin, 1957, a poorly known ballophilid centipede from Colombia, with description of Ityphilus bonatoi, a new diminutive geophilomorph species from Brazil (Myriapoda: Chilopoda, Geophilomorpha), Zootaxa 3716 (4), pp. 501-527 : 524-525

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

Figures

FIGURES 53 – 57. Ityphilus bonatoi sp. nov. (female holotype; BRAZIL: RJ: Ilha Grande): (53) Left antenna, ventral. (54) Left antenna, dorsal. (55) Apical portion of left a. a. XIV, dorsal (a: claviform sensilla, b: apical specialized sensilla). (56) Left a. a. V, ventral (a, b: a, b type sensilla). (57) Left a. a. IX, ventral (a, b: a, b type sensilla). Scale bars: 0.05 mm (55 – 57); 0.2 mm (53, 54).

FIGURES 58 – 65. Ityphilus bonatoi sp. nov. (female holotype; BRAZIL: RJ: Ilha Grande): (58) Left a. a. V, dorsal (a, b: a, b type sensilla). (59) Letft a. a. IX, dorsal (a, b, c: a, b, c type sensilla). (60) Left a. a. XIII, dorsal (a, b, c: a, b, c type sensilla). (61) Dorsal view of anterior region of the body, showing cephalic plate, bases of antennae, forcipular segment, and anterior portion of leg-bearing segment 1. (62) Clypeus and bases of antennae. (63) Labrum. (64) Dentate lamella of right mandible, ventral. (65) First and second maxillae, ventral. Scale bars: 0.02 mm (64); 0.05 mm (58 – 60); 0.1 mm (63, 65); 0.2 mm (61, 62).

FIGURES 66 – 74. Ityphilus bonatoi sp. nov. (female holotype; BRAZIL: RJ: Ilha Grande): (66) Claw of left telopodite of second maxillae, ventral. (67) Claw of left telopodite of second maxillae, dorsal. (68) Forcipular segment, ventral (a: chitin-lines). (69) Detail of duct (a), calyx (b), and poison gland (c), of venom apparatus in left forcipular telopodite, ventral. (70) Detail of duct (a) and calyx (b) of venom apparatus in right forcipular telopodite, ventral. (71) Sternite 2. (72) Sternite 4. (73) Sternite 9. (74) Sternite 13. Scale bars: 0.02 mm (66, 67); 0.1 mm (69 – 74); 0.2 mm (68).

FIGURES 106 – 118. (106). Ityphilus calinus Chamberlin, 1957 (male holotype; COLOMBIA: Valle del Cauca Department): Anterior end of the body, dorsal. (From Chamberlin, 1957). (107). Ityphilus donatellae Pereira, 2012 (female paratype; BRAZIL: Amazonas: 02 º 34´S, 60 º 06´W): Left antenna dorsal. (From Pereira, 2012). (108 – 117). Ityphilus donatellae Pereira, 2012 (female holotype; BRAZIL: Amazonas: 02 º 34´S, 60 º 06´W): (108) Left a. a. XIII, dorsal (a, b, c: a, b, c, type sensilla). (109) Detail of calyx of poison gland in left forcipular telopodite, ventral. (110) Sternite 2. (111) Sternite 3. (112) Sternite 5. (113) Sternite 8. (114) Sternite 17. (115) Sternite 27. (116) Sternite 35. (117) Sternite 42. (From Pereira et al., 2000). (118). Ityphilus idanus Crabill, 1960 (female holotype; BRITISH WEST INDIES: Barbuda, Damby Cave): Right forcipular telopodite, ventral (a: detail of calyx of poison gland). (From Crabill, 1960). Scale bars: 0.05 mm (108); 0.1 mm (107, 109 – 117). No scales available (106, 118).