Ityphilus, COOK, 1899

Pereira, Luis Alberto, 2012, A New Dwarf Species, New Distribution Records, And Supplementary Descriptive Notes Of The Centipede Genus Ityphilus Cook, 1899 (Chilopoda: Geophilomorpha: Ballophilidae) From Central Amazonia, Brazil, Papéis Avulsos de Zoologia 52 (25), pp. 291-309 : 304-305

Key to the Neotropical species of Ityphilus with forcipular tarsungulum serrate

1. Internal edge of forcipular tarsungulum entirely serrate ( Fig. 29 : a); internal side of a.a. I with strong stout setae ( Fig. 28 : a); coxosternite of second maxillae with a sulcus along the sagittal plane............................. .............................................................................................. I. sensibilis Pereira, Foddai & Minelli, 2000

– Internal edge of forcipular tarsungulum partially serrate; internal side of a.a. I without strong stout setae; coxosternite of second maxillae without a sulcus along the sagittal plane.................................................2

2. 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 .........................................................................3

3. 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 ( Fig. 31 : a) ...................................................................................... 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 .......................................................................................................................................................4

4. Ventral pore-fields of anterior half of the body undivided ( Fig. 32 ), those of the posterior half divided in two subsymetrical areas ( Figs. 33, 34 ) ........................................................... I. krausi Pereira & Minelli, 1996

– All pore-fields undivided............................................................................................................................5

5. 41 or 43 leg-bearing segments, body length 8.5 to 11 mm ............................................ I. donatellae sp. nov.

– 47 to 71 leg-bearing segments, body length 15 to 57 mm ..........................................................................6

6. Sternite of leg-bearing segment 1 with pore-field .......................................................................................7

– Sternite of leg-bearing segment 1 without pore-field ..................................................................................8

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

– 49, 55 leg-bearing segments; body length 23 mm; antennae distally strongly clavate; chitin-lines of forcipular coxosternite incomplete ....................................................................... I. guianensis Chamberlin, 1921

8. 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/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/ maximum width of forcipular trochanteroprefemur ca. 1.10-1.17: 1.......................................................9

9. 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 ........................................................................................................10

10. 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 ( Fig. 30 : a) ............................................................................................... I. betschi Pereira, 2010

Figures

FIGURES 24‑29: (24-25): Ityphilus demoraisi Pereira, Minelli & Barbieri, 1995, (female holotype; Brazil: Amazonas: Adolpho Ducke Forest Reserve): (24) Ultimate leg-bearing segment and postpedal segments, ventral; (25) Right coxal organs, ventral (From Pereira et al., 1995). (26): Ityphilus calinus Chamberlin, 1957 (male holotype; “Colombia: 13 mi. W. of Cali, Valle”): Anterior end of the body, dorsal. (From Chamberlin, 1957). (27): Ityphilus ceibanus Chamberlin, 1922, (type (sex?); Honduras: La Ceiba): Anterior end of body, dorsal. (From Chamberlin, 1922). (28-29): Ityphilus sensibilis Pereira, Foddai & Minelli, 2000, (female holotype; Brazil: Amazonas: 02°34’S, 60°06’W): (28) Clypeus and bases of antennae (a: strong stout seta); (29) Detail of duct and calyx of poison gland in left forcipular telopodite, ventral (a: internal edge of tarsungulum, entirely serrate). (From Pereira et al. 2000). Scale bars: 0.1 mm (28, 29); 0.2 mm (25); 0.3 mm (24); no scales available (26, 27).

FIGURES 30‑34: (30): Ityphilus betschi Pereira, 2010, (male holotype; French Guiana: piste de St. Elie; 16 km from Sinnamary): Penultimate and ultimate leg-bearing segments, and postpedal segments, ventral (a: pore-field). (Modified from Pereira, 2010). (31): Ityphilus mauriesi Demange & Pereira, 1985, (female holotype; French Antilles: Guadeloupe): Sternite of ultimate leg-bearing segment (a: ovoid prominences). (Modified from Demange & Pereira, 1985). (32-34): Ityphilus krausi Pereira & Minelli, 1996, (male holotype; Peru: Atiquipa): (32) Sternite of leg-bearing segment 28; (33) Sternite of leg-bearing segment 34; (34) Sternite of leg-bearing segment 40. (After Pereira & Minelli, 1996). Scale bars: 0.3 mm (32-34); 1.0 mm (30); no scale available (31).