Pronura paraguayana, G. & Palacios-Vargas & Deharveng & A. & D’Haese & Unam & D. & F., 2011

Palacios-Vargas, José G., Deharveng, Louis & D'Haese, Cyrille A., 2011, The genus Pronura (Collembola: Neanuridae) in South America, with descriptions of two new species and a barcode sequence for one of them, Revue suisse de Zoologie 118 (1), pp. 197-205 : 202-204

Pronura paraguayana sp. n. Figs 8-14

HOLOTYPE: MHNG, without registration number; female on slide; Paraguay, Provincia Caaguazu. Río Yujury, 17 km south of Yhu , sifting in tropical dry forest; 9-IV-1985; leg. expédition zoologique du Muséum de Genève.

PARATYPES: MHNG, except for one paratype male in UNAM and one paratype female in MNHNP, without registration numbers; three females, two males, one preadult female, one juvenile, all on slides; collected together with the holotype .

OTHER MATERIAL: MHNG, without registration numbers; one female, three juvenils; Paraguay, Provincia Caaguazu, 20 km north of Coronel Oviedo (10 km south of Carayou ), sifting of litter and dead trunks; 9-IV-1985; leg. expédition zoologique du Muséum de Genève .

ETYMOLOGY: The species name refers to the country of origin of the specimens examined ( Paraguay).

DIAGNOSIS: Head dorsally with C absent, E absent and Ocp present. Two macrosetae (Th. II-III) and one macroseta (Abd. I-IV) on De tubercles of tergites.

DESCRIPTION: Length (n = 6 adults) 0.76-1.08 mm. Color white. Granulation of the body fine, stronger on tubercles, these also indicated by tertiary granulation, mainly laterally and on Abd. V-VI. Tubercles De and DL developed, Di not developed from head to Abd. IV; tubercles of Abd. V-VI strongly developed. Two kinds of ordinary dorsal setae: thick, slightly barbulate macrosetae (M) and shorter, thinner, more bent and less barbulate microsetae (m). Sensorial setae (s) long and thin (Fig. 8).

Ant. I with 7 setae, Ant. II with probably 11 setae, the dorsal ones thicker and longer than the ventral ones. Ant. III sensorial organ with two globular sensilla in a cuticular fold, and two guard sensilla. S.g. v. almost straight and longer than S.g.d.; one ventral microsensillum. Ant. IV with 8 subequal sensilla, twelve long and finely blunt setae (mou), one short acuminate seta (i) and a small subapical organ. No apical bulb differentiated.

Eyes 2 + 2, unpigmented, large (diameter three times that of surrounding secondary granules) (Fig. 9). Mandibles with 2 teeth, maxillae styliform. Head without well-developed tubercles. Labrum elongate, rounded apically (Fig. 10). Labrum formula?/2,4. Labium with 4 basal, 3 distal and 3 lateral setae, without conspicuous x-papilla (Fig. 11).

Five cephalic tubercles (Table 2). Head chaetotaxy as in Fig. 8. Seta D free.

Tergite chaetotaxy as in Fig. 8 and Table 2. Tubercles of Abd. VI fused in a single, well differentiated tubercle (Fig. 12).

FIGS 8-14

Pronura paraguayana sp. n., female holotype. (8) Dorsal chaetotaxy. (9) Left ocular area. (10) Labrum. (11) Labium. (12) Abdominal segments V and VI. (13) Tibiotarsus of leg II in ventral view. (14) Chaetotaxy of abdominal sternites II-VI (group of setae VL+L surrounded with dotted line).

Number of setae on legs I, II and III: tibiotarsi: 18, 18 and 17 (M absent, Fig. 13); femora:?12,?,?; trochanters: 6, 6, 6; coxae: 3, 7, 8; subcoxae 2: 0, 2, 2. Unguis without tooth. Tibiotarsi without tenent hairs (Fig. 13).

TABLE 2. Dorsal chaetotaxy of Pronura paraguayana sp. n. Setae number by setal groups.