Penelopella Cassagnau, 1986

Weiner, Wanda Maria, Najt, Judith & Paśnik, Grzegorz, 2012, Collembola Poduromorpha (Entognatha) from continental Yemen and Socotra Island, with the description of a new Xenylla Tullberg, 1869, Zoosystema 34 (3), pp. 553-560 : 556-560

Genus Penelopella Cassagnau, 1986

Penelopella pohli ( Barra, 2006) n. comb. ( Fig. 2 ; Table 1)

Neanura (Neanura) pohli Barra, 2006: 63-65 , fig.1.

MATERIAL EXAMINED. — Holotype: Socotra, Wadi Daneghan, 21-22.X.2000, HP, ♂ (HLDM-Apt-33-HT). Paratype: Di-Fa’rohr, 25.X.2000, HP, 1 ♀ (HLMD- NHCY-PT1).

OTHER MATERIAL. — Socotra, Wadi Daneghan, natural landscape, steep valley with a permanent stream, with rather dense vegetation on the valley sides, leaf litter under a Ficus tree, 30.X.2000, A. Van Harten, 1 ♂, 2 ♀♀ ( ISEA Ye-00-4905/1-3).

REDESCRIPTION Colour in life orange (A. Van Harten, pers. com.), white in alcohol, eyes without pigmentation. Tubercles not developed in medial part of Th. terga I-III and Abd. terga I-IV. Abd.VI bilobated ( Fig. 2A, H ).

Ant.I with seven chaetae, Ant. II with 11 chaetae. Ant. III and IV fused dorsally, ventral separation well marked. Sensory organ of antennal segment III consisting of:two small internal sensilla bent in the same direction, two subcylindrical guard sensilla (ventral one longer than the dorsal one), ventral ms present. Antennal segment IV with ordinary chaetae, dorsally with eight distinct, subcylindrical sensilla: seven DL and one lateral, without ms, with subapical organite and trilobated apical vesicle ( Fig. 2B, C ). Mandible with two teeth, maxilla unlamellated with small hook at apex ( Fig. 2G ). Labrum long with 0/22 chaetae ( Fig. 2D, E ). Labium without chaeta B ( Fig. 2F ).

Dorsal chaetotaxy as in Figure 2A and Table 1. All ordinary chaetae covered with a weak sheath and slightly serrated. Sensory chaetae s rather long, their formula per half tergum: 022/22221. Th. sterna without chaetae. Abd. chaetotaxy in Figure 2H and Table 1.

Tibiotarsi I, II and III with 18, 18 and 17 chaetae respectively, with acuminate distal chaetae. Chaeta M absent. Femora I, II and III with 13, 12 and 11 chaetae, respectively, trochanters with 6 chaetae each, coxae I, II and III with 3, 7 and 8 chaetae, Scx2 I, II and III with 0, 2 and 2 chaetae, respectively, Scx1 (= tubercle L) I, II and III with 1, 3 and 3 chaetae.

REMARKS

The material collected by Antonious Van Harten and the observation of holotype and paratype (now very transparent) allowed us to transfer Neanura pohli to the genus Penelopella . The genus was created by Cassagnau (1986) for the species described from Fiji and Vanuatu (Efate) islands and till now not found elsewhere. The genus Penelopella can be characterised by the following combination of characters: one additional sensory chaeta s in lateral tubercle (L) of Abd. segments I-III, tubercles Di not developed on head, Th. and Abd. segments I-IV, 2 + 2 eyes without pigment, absence of blue pigment of the body, central chaetotaxy of the head (tubercle Cl-Af) without chaetae O, A and E.

Pelenopella pohli differs from P.pacyfica Cassagnau, 1986 in the much better differentiated tubercles not only on three last Abd. segments, but also on the head, Th. I-III and Abd. terga I-III. The species from Socotra Island possess also two normal chaetae and one chaeta s on external tubercles (De) of Abd. segments I-IV while in P. pacyfica it has only one normal chaeta and one chaeta s.

Family ONYCHIURIDAE Lubbock, 1867 Subfamily ONYCHIURINAE Börner, 1901 Tribe THALASSAPHORURINI Pomorski, 1998

Figures

FIG. 2. — Penelopella pohli (Barra, 2006) n. comb.: A, dorsal chaetotaxy; B, antennal segments III and IV, dorsal view; C, antennal segments III and IV, ventral view;D, labrum;E, apex of labrum,ventral view; F, labium; G, mandible and maxilla; H, ventral chaetotaxy of abdomen. Scale bars: A, H, 0.1 mm; B-G, 0.01 mm.