Delamarephorura capensis, Janion & Deharveng & Weiner, 2013

Janion, Charlene, Deharveng, Louis & Weiner, Wanda Maria, 2013, Synonymy Of Spicatella Thibaud, 2002 With Delamarephorura Weiner & Najt, 1999, And Description Of Two New Species (Collembola: Tullbergiidae), Raffles Bulletin of Zoology 61 (2), pp. 657-663 : 659-661

Delamarephorura capensis , new species

Fig. 1 , Table 2

Material examined. — Holotype: 1 female (deposited in SAMC), South Africa, Western Cape province, Kleinmond, Betty’s Bay , sandy soil, Berlese extraction, coll. Louis Deharveng & Anne Bedos (SAF-064), 11 Mar.2008.

Paratypes: 4 paratypes (1 male and 3 juveniles) in SAMC ; 4 paratypes (1 male, 1 female and 2 juveniles) in MNHN ; 3 paratypes (2 females and 1 juveniles) in ISEA ; same data as holotype .

Description. — Length. Holotype female: 1.16 mm, paratype male length: 1.07 mm, paratypes juvenile: 0.47–0.55 mm. Colour: white in alcohol. Granulation coarser on dorsal side of the body, with secondary granules larger on axial and lateral areas from Th. I to Abd. IV. Double-striate pseudocelli (type II after Weiner & Najt, 1991), their formula per half terga as 11/111/11111 ( Fig. 1A ).

Antennal segment IV with five sensilla S1, S4, S7, S8 and S9 (after D’Haese, 2003) = a–e (after Rusek, 1971), a microsensillum, a subapical organite very short, rooting deeply into the integument, and a small exsertile apical vesicle. Antennal III-organ dorsally with two large ovoid sensory clubs and two small sensory rods, protected by three large guard papillae and four guard chaetae; ventrally, one ovoid bent sensory club ( Fig. 1C, D ). Antennal segment I and II with 7 and 11 chaetae respectively. Postantennal organ ear-shaped, 2.5 times longer than pseudocellus diameter, with 10 (8–12) simple vesicles in two regular rows ( Fig. 1B ). Labral chaetotaxy: 2/42.

Dorsal chaetotaxy as in Fig. 1A, G and Table 2 with macro-, meso- and microchaetae, sensory chaetae “s” not clearly recognised. Lateral microsensilla on thoracic terga II and III present. Head with chaetae p1 and p2 as microchaetae, p3 as mesochaeta, p4 as tiny microchaeta and p5 as macrochaeta. Abdominal tergum VI with crescentic ridges very faint or absent, dorsal processes absent, a very small ventro-medial process ( Fig. 1H ) and two anal spines on distinct papillae. Anal spines 1.5 times as long as inner edge of claw and 1.8 times as long as their basal diameter. Thoracic sterna II and III with 1+1 chaetae each.

Ventral abdominal chaetotaxy as in Fig. 1H . Abdominal sternum I with 2+2 chaetae and ventral tube with 4+4 latero-distal chaetae. No fine granulated area on abdominal sternum IV but 2+2 chaetae present in the position of the furcal rudiment.

Tibiotarsi I, II and III with 10, 10, 10 chaetae (A1, A2, A3, A6, A 7 in whorl A; B3, B4, B5, B 6 in whorl B; chaeta M present, Fig. 1E, F ). Femora I, II and III each with 8 chaetae;

trochanters I, II and III with 5, 5, 4 chaetae; coxae I, II and III with 3, 6, 7 chaetae; subcoxae 2 of legs I without chaetae, of legs II and III, each with 4 chaetae; subcoxae 1 of legs I, II and III with 2, 3, 3 chaetae. Claw stout, without tooth. Empodial appendage relatively thin and pointed, subequal on all legs, about 1/2.5 as long as inner edge of claw.

Etymology. — The species is named after the biogeographical province where it was collected.

Distribution. — Only known thus far from the type locality, in sandy soil of coastal fynbos vegetation, probably endemic.

Remarks. — Delamarephorura capensis , new species, is the only species of the genus with pseudocellar formula as 11/111/11111. See Table 1 for other differential characters.

Figures

Fig. 1. Delamarephorura capensis, new species: A, dorsal chaetotaxy; B, postantennal organ and pseudocellus; C, antenna; D, antenna III-organ: sensory clubs and sensory rods; E, ventro-lateral view of tibiotarsus III; F, ventral view of tibiotarsus III, other specimen; G, chaetotaxy of abdominal terga V and VI; H, ventral chaetotaxy of abdomen, with ventral process of abdomen VI. Scale bars = 0.1 mm (A, H), 0.05 mm (G), 0.01 mm (B, C, E, F).