Pacificampa nipponica Sendra

Sendra, Alberto, Yoshizawa, Kazunori & Ferreira, Rodrigo Lopes, 2018, New oversize troglobitic species of Campodeidae in Japan (Diplura), Subterranean Biology 27, pp. 53-73 : 57-61

Pacificampa nipponica Sendra sp. n. Figs 23, 24, 36, 39, Tables 3, 4

Etymology.

Species epithet refers to Japan.

Type material.

Male holotype labeled SH01 from Goya Daiichi Shonyu-do Cave (33.689N, 130.811E), ISLA 47550, Japan, 9 September 2017, Ferreira, R.L. leg. (SEHU); 1 juvenile paratype labeled from the same type locality (AS), data and leg. mounted in Marc André solution. Deposited AS collection and Hokkaido University Insect Collection: SEHU

Other studied material. 1 ♂, 1 ♀ labeled IN01 and IN02 from Inaba-do Cave (33.439N, 133.086E), ISLA 47549, Japan, 7 September 2017, Ferreira, R.L. leg. (AS).

Description.

Body length 5.0 and 6.3 mm (males), 6.0 mm (female) and 4.8 mm (juvenile) (Fig. 36-39, Table 3). Epicuticle smooth under optical microscope; body with abundant thin and smooth clothing.

One intact antenna in the male holotype SH01 with 34 antennomeres, longer (1.17) than the body. Apical antennae 4.6 times longer than wide and central antennomeres 3.5 times longer than wide (Table 3). Cupuliform organ occupying 1/10 of the total length of apical antennomere about 8 complex olfactory chemoreceptors. Distal and central antennomeres with a sensorial equipment of macrosetae and setae in addition to a single distal whorl of 12-14 thin and long gouge sensilla and 2-3 very short coniform sensilla, also present in the apical antennomere. Proximal antennomeres with typical trichobothria plus the sensillum of the third antennomere coniform located in dorsal position between b and c macrosetae.

Plain frontal process with the three frontal macrosetae smooth. The three macrosetae along each side of the line of insertion of antennomere and x setae smooth and with 25/40/26/20 (a/i/p/x) relative lengths. Suboval labial palps with latero-external short thick sensillum, with two guard setae, up to seven setae on anterior border and up to 110 neuroglandular setae.

Thoracic macrosetae distribution (Fig. 23): pronotum with 1+1 ma, 1+1 la, 1+1 lp; mesonotum with 1+1 ma, 1+1 la, 2+2 lp2,3; metanotum with 1+1 ma, 1+1 lp3 macrosetae. All macrosetae developed slightly thick and with short barbs along the distal half or third; marginal setae longer and thicker than clothing setae with distal thin barbs. Legs elongated, metathoracic legs reaching the IX abdominal in the adults (ME01 and ME02) and the IX abdominal in the juvenile (paratype SH02) (Table 3). Femur I–III with one long dorsal macrosetae well differentiated with a few distal barbs. Tibia I–II with one ventral macroseta, tibia III with two ventral macrosetae with a few tiny thin apical barbs. Calcars differentiated with 1-3 long distal barbs. The tibial two rows of ventral setae are longer and thicker than clothing setae but smooth like the clothing setae. Dorsal and lateral tarsal setae similar to clothing setae but much longer (Table 3). Subequal slightly curved plain claws (posterior claw 1.05 longer than anterior one); no expansion of the claws is present.

Distribution of abdominal macrosetae on tergites (Fig. 24): 1+0 sma on II (only in the juvenile SH02); 1+1 sma on III (only in the juvenile SH02); 1+1 ma (0+1 lp in juvenile SH02 and male IN01 and 0+1 sla in female IN02) on IV; 1+1 ma, 1+1 la and 2+2 lp2,3 on V-VII; 1+1 mp, 3+3 lp1,2,3 on VIII; 1+ 1 mp, 5 lp1,2,3,4,5 on IX abdominal segment. All tergal abdominal macrosetae thick, long and well differentiated with thin barbs along the distal half to third; submacrosetae thinner and shorter than macrosetae and smooth as macrosetae.

Urosternite I with 6+6 macrosetae (5+5 in juvenile SH02); urosternites II to VII with 4+4 macrosetae; urosternite VIII with 1+1 macrosetae; almost all urosternal macrosetae long, well differentiated and covered by long barbs along the distal half. Smooth apical setae of styli with a short tooth with one tiny thin barb; also, smooth subapical and ventromedial setae, the ventromedial being much longer than the others. Cerci in the holotype with six articles including the basal article, slightly shorter than the body length (0.99); in juvenile paratype young SH02 has two cerci with six and seven articles, 1.30 and 1.41 longer than the body length; their basal articles show several whorls of long thin macrosetae with a few apical barbs, along the medial and distal articles these long macrosetae became smooth and whorls of sorther smooth setae are present among them; all the articles are characterized by an apical whorl of thin smooth setae also present at the end of the last article (Table 4).

Female urosternite I with subcylindrical appendages slightly thinner than male appendages 2.2 times longer than wide, each bearing 30 a1-glandular setae in a distal field.

Male urosternite I with moderated thick subcylindrical appendages 2 times longer than wide, each bearing up to 50 a1-glandular setae in a field covering the distal fifth of the appendage.

Remarks.

P. nipponica Sendra sp. n. is closer to the continental Pacificampa (P. birsteini , P. caesa by Chevrizov (1978) and the not-formally-described Pacificampa species by Ferguson (1997) from China, northern Korean peninsula) with some taxonomic differences in: presence of 1+1 ma macrosetae on urosternite IV, and urosternites II to VII with 4+4 macrosetae (instead of 5+5).