Pectiniunguis ducalis Pereira, Minelli &

Pereira, Luis Alberto, 2010, Redescription Of Pectiniunguis Gaigei (Chamberlin, 1921) From Guyana, With New Distributional Data And Complementary Descriptive Notes On Similar Neotropical Species (Chilopoda: Geophilomorpha: Schendylidae), Papéis Avulsos de Zoologia 50 (20), pp. 297-321 : 316-319

Pectiniunguis ducalis Pereira, Minelli &

Barbieri, 1995

( Figs. 67-82 )

Pectiniunguis ducalis Pereira, Minelli & Barbieri, 1995:325 , 338-340; Adis et al., 1996:166, 168, 169; Pereira et al., 1997:85; Pereira et al., 1999:177; Pereira et al., 2000:3, 54; Foddai et al., 2000:128, 179; Pereira et al., 2001:143, 144, 146; Foddai et al., 2002:473.

Diagnosis: Similar to P. gaigei , P. geayi , and P. roigi (cf. Table 1), from which it is differentiated by the following unique traits (characters for P. gaigei , P. geayi , and P. roigi are given in parentheses): males with 63, 65, 67, 69, 71 and females with 65, 67, 69, 71, 73 leg-bearing segments (males with 49, 51, 53, (55?), 57 and females with 51, (53?), 55 leg-bearing segments); body length up to 67 mm (up to 45 mm); ratio length of antennae/length of cephalic shield, ca. 4.3: 1 (ca. 2.9-3.3: 1); clypeus with ca. 18 medial setae (with ca. 7-13 medial setae); teeth of lateral pieces of labrum as long hyaline filaments, Fig. 72 (subtriangular with a sharp medial extension, Figs. 9 , 55 , 86 ); ratio greatest length/greatest width of forcipular trochanteropraefemur, ca. 1.47: 1 (ca. 1.30: 1; ca. 1.40: 1; ca. 0.94: 1).

Morphological traits in Table 1 differentiate P. ducalis from P. gaigei , P. geayi , and P. roigi .

New material examined: BRAZIL: Amazonas : Reserva Florestal A. Ducke (terra firme, primary upland forest), (Kempson soil extraction), 1 April 1987, J. Adis et al. leg.: 1 male juvenile with 1+1 coxal organs only, 63 leg-bearing segments, body length 18 mm ( MLP) . BRAZIL: Amazonas : Manaus: INPA, terra firme, secondary upland forest, (unburned), Kempson soil extraction, 03°08’S, 60°01’W, 24 April 1986, J. Adis et al. leg.: 1 female with the two spermathecae full of spermatozoa and with mature ova, 73 leg-bearing segments, body length 67 mm; 11 juveniles with 1+1 coxal organs only: 4 females with 71 leg-bearing segments, body length 21.5, 22, 23, 23 mm; 2 females with 73 leg-bearing segments, body length 21, 21.5 mm; 3 males with 69 leg-bearing segments, body length 20.5, 21.5, 22 mm; 2 males with 71 leg-bearing segments, body length 21, 22 mm ( MLP) . BRAZIL: Amazonas : Rio Tarumã Mirím, capoeira (soil extraction), 30 January 1983, J. Adis legit: 1 female with the two spermathecae full of spermatozoa, 71 leg-bearing segments, body length 66 mm ( INPA) . BRAZIL: Amazonas : Lago Janauarí, secondary upland forest (pitfall traps), (03°20’S, 60°17’W), 7 March 1996, J. Adis et al. leg.: 1 female with the two spermathecae full of spermatozoa, 67 leg-bearing segments, body length 31 mm ( INPA) .

Remarks: The localities of Manaus: INPA; Rio Tarumã Mirím; and Lago Janauarí (all in BRAZIL: Amazonas), are new for the geographical distribution of P. ducalis .

Sixty-three, 69 and 71 leg-bearing segments for the males; 71 and 73 leg-bearing segments for the females, are new for this species.

Up to the present, the maximum body length known for adult females was 52 mm, but from the above cited material, it is up to 67 mm.

Postembryonic variation of coxal organs: aspect of the unique two (anterior) coxal organs present in a female juvenile (with 67 leg-bearing segments, body length 15 mm), as shown in Figs. 67, 68 . (Posterior organs absent, due to the juvenile condition of the specimen).

Characteristics of the coxal organs in adult specimens are shown in Fig. 78 .

Type locality: BRAZIL: Amazonas: Reserva Florestal A. Ducke .

Known range: BRAZIL: Amazonas: Reserva Florestal A. Ducke; RioTarumã Mirím; Manaus: INPA; Lago Janauarí.

Figures

FIGURES 67‑68: Pectiniunguis ducalis Pereira, Minelli & Barbieri, 1995, (female juvenile (A); BRAZIL: Amazonas: Reserva Florestal A. Ducke): (67) Last leg-bearing segment and terminal segments showing coxal organs, ventral; (68) Detail of coxal organs, ventral. (After Pereira et al., 1995). Scale bars: 0.3 mm (67); 0.1 mm (68).

FIGURES 69‑75: Pectiniunguis ducalis Pereira, Minelli & Barbieri, 1995, (male holotype; BRAZIL: Amazonas: Reserva Florestal A. Ducke): (69) Left a.a. I-VII, ventral; (70) Left a.a. VIII-XIV, ventral; (71) Detail of distal end of right a.a. XIV, dorsal (a: claviform sensilla, b: apical specialized sensilla); (72) Labrum; (73) Detail of posterior external region of right second maxilla, ventral; (74) Forcipular segment, ventral; (75) Detail of calyx and conduct of poison gland in left forcipular telopodite, ventral. (After Pereira et al., 1995). Scale bars: 0.4 mm (69, 70); 0.05 mm (71); 0.2 mm (72, 75); 0.1 mm (73); 0.6 mm (74).

FIGURES 76‑80: Pectiniunguis ducalis Pereira, Minelli & Barbieri, 1995, (male holotype; BRAZIL: Amazonas: Reserva Florestal A. Ducke): (76) Last leg-bearing segment and terminal segments, dorsal; (77) Last leg-bearing segment and terminal segments, ventral. (78) Left coxal organs, ventral; (79) Detail of distal end of last podomere of right last leg, ventral; (80) Penis, dorsal. (After Pereira et al., 1995). Scale bars: 0.6 mm (76, 77); 0.1 mm (78, 80); 0.05 mm (79).

FIGURES 81‑82: Pectiniunguis ducalis Pereira, Minelli & Barbieri, 1995, (female allotype; BRAZIL: Amazonas: Reserva Florestal A. Ducke): (81) Last leg-bearing segment and terminal segments, ventral; (82) Last leg-bearing segment and terminal segments, dorsal. (After Pereira et al., 1995). Scale bar: 0.6 mm (81, 82).

FIGURES 6‑12: Pectiniunguis gaigei (Chamberlin,1921),(female paratype MCZ TC-161; GUYANA:Dunoon), (Reference Adenoschendyla gaigei): (6) Cephalic shield and basis of antennae; (7) head capsule and basis of antennae, ventral; (8) clypeal area; (9) labrum; (10) dentate lamella of left mandible; (11) dentate lamella of right mandible; (12) first and second maxillae, ventral. Scale bars: 0.5 mm (6, 7); 0.1 mm (8); 0.3 mm (9, 12); 0.05 mm (10, 11).

FIGURES 54‑59: Pectiniunguis geayi (Brölemann & Ribaut, 1911), (male (specimen A); BRAZIL: Amazonas: Lago Janauarí): (54) Right antenna, ventral; (55) Labrum; (56) First and second maxillae, ventral; (57) Forcipular segment, ventral; (58) Detail of calyx and conduct of poison gland in left forcipular telopodite, ventral; (59) Last leg-bearing segment and terminal segments, dorsal. (After Pereira et al., 2000). Scale bars: 0.3 mm (54, 57, 59); 0.1 mm (55); 0.2 mm (56, 58).

FIGURES 83‑89: Pectiniunguis roigi Pereira, Foddai & Minelli, 2001 (male holotype; ECUADOR: Napo: Limoncocha): (83) Right antenna, ventral; (84) Right a.a. XIV, dorsal; (85) Detail of apex of left a.a. XIV, ventral (a: claviform sensilla, b: apical specialized sensilla; c: small seta); (86) Labrum (form of central arc altered by squashing); (87) Detail of posterior external region of right second maxilla, ventral; (88) Forcipular segment, ventral, (89) Detail of calyx and conduct of poison gland in right forcipular telopodite, ventral. (After Pereira et al., 2001). Scale bars: 0.3 mm (83, 88); 0.1 mm (84, 86, 87); 0.03 mm (85); 0.2 mm (89).