Pectiniunguis geayi ( Brölemann & Ribaut, 1911 )

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 : 313-316

Pectiniunguis geayi ( Brölemann & Ribaut, 1911)

( Figs. 51-66 )

Adenoschendyla Geayi Brölemann & Ribaut, 1911:219 .

Adenoschendyla geayi : Brölemann & Ribaut, 1912:108-109; Chamberlin, 1914:153, 201, 204; Chamberlin, 1921:19, 20.

Pectiniunguis geayi : Attems, 1929:81; Bücherl, 1942a:205; Bücherl, 1942b:351; Crabill, 1959:325, 326; Pereira & Coscarón, 1975 (1976):68, 72; Adis et al., 1996:168, 169; Pereira et al., 1999:177; Pereira et al., 2000:3-5, 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. ducalis , and P. roigi (cf. Table 1), from which it is differentiated by the following unique traits (characters for P. gaigei , P. ducalis , and P. roigi are given in parentheses): male lowest number of leg-bearing segments: 49 (53, 63, 57?); coxosternum of second maxillae with ca. 13 setae (with ca. 22-31 setae); penis apparently devoid of setae (with 1+1 or 2+2 apical setae).

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

New material examined: 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 male juvenile, 49 leg-bearing segments, body length 17 mm ( INPA) .

Remarks: The locality of Manaus: INPA, is new for the geographical distribution of this species.

Postembryonic variation of coxal organs: The juvenile specimen cited above has the coxal organs incompletely developed ( Figs. 51-53 ): the anterior organs have the aspect of “homogeneous” (instead of “heterogeneous” = adult condition); in contrast the posterior

ones are clearly heterogeneous but still incompletely developed ( Figs. 51-53 ).

Characteristics of anterior and posterior coxal organs in adult specimens are shown in Fig. 64 .

Type locality: BRAZIL: Para: Bas Carsévène .

Known range: BRAZIL: Para: Bas Carsévène. BRAZIL: Amazonas: Rio Tarumã Mirím; Lago Janauarí; Manaus: INPA.

Figures

FIGURES 51‑53: Pectiniunguis geayi (Brölemann & Ribaut, 1911), (male juvenile; BRAZIL: Amazonas: Manaus): (51) Last leg-bearing segment and terminal segments, ventral; (52) Detail of right coxal organs, ventral; (53) Detail of left coxal organs, ventral. Scale bars: 0.2 mm (51); 0.1 mm (52, 53).

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 60‑62: (60-61): Pectiniunguis geayi (Brölemann & Ribaut, 1911), (male (specimen A); BRAZIL: Amazonas: Lago Janauarí): (60) Last leg-bearing segment and terminal segments, ventral; (61) Penis and gonopods, ventral. (62): Pectiniunguis geayi (Brölemann & Ribaut, 1911), (female (specimen B); BRAZIL: Amazonas: Lago Janauarí): Last leg-bearing segment and terminal segments, dorsal. (After Pereira et al., 2000). Scale bars: 0.3 mm (60, 62); 0.05 mm (61).

FIGURES 63‑66: (63-65): Pectiniunguis geayi (Brölemann & Ribaut, 1911), (female (specimen B); BRAZIL: Amazonas: Lago Janauarí): (63) Last leg-bearing segment and terminal segments, ventral; (64) Left coxal organs ventral; (65) Detail of distal end of last podomere of left last leg, dorsal. (After Pereira et al., 2000). (66): Pectiniunguis geayi (Brölemann & Ribaut, 1911), (BRAZIL: Bas Carsévène), (Reference Adenoschendyla geayi): Detail of coxosternum of right second maxilla, ventral. (After Brölemann & Ribaut 1912). Scale bars: 0.2 mm (63, 64); 0.05 mm (65); no scale available (66).