Ityphilus guianensis Chamberlin, 1921

Pereira, Luis Alberto, 2010, First Record Of A Ballophilid Centipede From French Guiana With A Description Of Ityphilus Betschi Sp. Nov. (Myriapoda: Chilopoda: Geophilomorpha), Papéis Avulsos de Zoologia 50 (42), pp. 643-665 : 660

Ityphilus guianensis Chamberlin, 1921

( Figs. 57-59 )

Ityphilus guianensis Chamberlin, 1921:23-25 ; Attems, 1929:106; Chamberlin, 1943:16; Chamberlin, 1945:171; Chamberlin, 1957:25; Pereira & Minelli, 1996:110; Foddai et al., 2000:154; Foddai et al., 2002:473; Foddai et al., 2004:276; Bonato et al., 2007:3.

Ityphilus cf. guianensis : Adis et al., 1996:168

Remarks: This species was insufficiently described by Chamberlin (1921). The original description lacks information on important characters of specific value and only includes three inadequately detailed figures. Nevertheless, several approximate ratios (herein included in Table 1, as indicative features for this species), related to antennal articles; cephalic plate; forcipular segment; ultimate legs; tergite and sternite of the ultimate leg-bearing segment, are tentatively deduced from the original figures.

In the original description Chamberlin states “Pairs of legs, forty-nine in one specimen and fiftyfive in two”, but does not specify to which sex these numbers correspond. Describing the ultimate legs, he says “Anal legs, in the male at least, strongly thickened, subconically narrowing from base to distal end”. Because this trait is consistent with his “fig. 24” (here reproduced as Fig. 59 ), it is possible that the specimen drawn is a male (but the schematic aspect of the postpedal segments, does not permit confirmation of its sex).

Type locality: British Guiana: Dunoon .

Distribution: Guyana: Dunoon. Trinidad. Brazil: Amazonas.

Figures

FIGURES 53‑59: (53-54): Ityphilus crabilli Pereira, Minelli & Barbieri, 1994, (female holotype; Brazil: Amazonas: Rio Tarumã Mirím): (53) Left antenna, ventral; (54) Detail of duct and calyx of poison gland in left forcipular telopodite, ventral. (After Pereira et al. 1994). (55, 56): Ityphilus demoraisi Pereira, Minelli & Barbieri, 1995, (female holotype; Brazil: Amazonas: Reserva Fl. A.Ducke):(55) Left antenna, ventral; (56) Detail of duct and calyx of poison gland in right forcipular telopodite, ventral. (After Pereira et al., 1995). (57-59): Ityphilus guianensis Chamberlin, 1921, (specimen male? Guyana: Dunoon): (57) Anterior end of the body, dorsal view; (58) Forcipular segment and anterior part of leg-bearing segment 1, ventral, (59) Posterior part of penultimate leg-bearing segment, ultimate leg-bearing segment, and postpedal segments, ventral. (After Chamberlin, 1921). Scale bars: 0.1 mm (54, 56); 0.2 mm (53, 55); no scale available (57-59).