Endonura centaurea Cassagnau & Peja 1979
Creators: name: Smolis, Adrian
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Entognatha
Collembola
Neanuridae
Endonura
Endonura centaurea

description: Endonura centaurea (Cassagnau & Péja, 1979)
Figs 8–12, Tab. 2
Neanura (Endonura) centaurea: Cassagnau & Péja 1979: 216.
Type material. Syntypes: subadult female and 2 juveniles on slides, Greece, Mount Ossa, leg. P. Cassagnau, coll. P. Cassagnau (MNHN).
Diagnosis. Habitus typical of the genus Endonura. Dorsal tubercles present and well developed. 2+2 eyes unpigmented. Buccal cone short, labrum nonogival. Head with chaetae A, B, C, D, F and G. Chaetae O and E absent. Tubercles Cl and Af separate. Tubercles Dl and (L+So) on head with 6 and 9 chaetae respectively. Tubercles Di on th. I absent. Tubercles De on th. II and III with 3 and 4 chaetae respectively. Tubercles L on abd. III and IV with 3 and 6 chaetae respectively. Abd. IV and V with 8 and 3 tubercles respectively. Claw without inner tooth. Tibiotarsi with chaetae B4 and B5 short.
Redescription. Habitus typical of the genus. Body length of syntypes (without antennae): 0.95–1.25 mm. Colour of the body white. 2+2 small unpigmented eyes (Figs 8–9).
Types of dorsal ordinary chaetae. Macrochaetae Ml thickened, relatively long, arc-like or straight, narrowly sheathed, feebly serrated, apically pointed or rarely rounded (Figs 8–9, 11); macrochaetae Mc and Mcc thickened, straight, pointed or apically rounded; mesochaetae and microchaetae short, thin and pointed.
a) Cephalic chaetotaxy––dorsal side.
b) Cephalic chaetotaxy––ventral side.
Group Number of chaetae Vi 6 Vea 4 Vem 3 Vep 3 Labium 11, 0x
c) Chaetotaxy of antennae.
d) Postcephalic chaetotaxy.
Terga Legs
Di De Dl L Scx2 Cx Tr Fe T th. I 1 2 1 - 0 3 6 13 19 th. II 3 2+s 3+s+ms 3 2 7 6 12 19 th. III 3 3+s 3+s 3 2 8 6 11 18
Sterna
abd. I 2 3+s 2 2 VT: 4
abd. II 2 3+s 2 3 Ve: 4–5 Ve1 - Present
abd. III 2 3+ s 2 3 Vel:5 Fu:5–6me 4mi abd. IV 2 2+ s 3 6 Vel: 4 Vec: 2 Vei: 2 Vl: 4 abd. V (3+3) 5+s Ag: 3 Vl: 1 L': 1 abd. VI 7 Ve: 14 An: 2mi Head. Buccal cone short with labrum nonogival. Labrum chaetotaxy 2/2, 4. Labium with four basal, three distal and four lateral chaetae, papillae x absent (Fig. 10). Maxilla styliform, mandible thin tridentate. Chaetotaxy of antennae as in Tab. 2 c. Apical vesicle distinct, trilobed. S-chaetae of ant.IV of medium length and moderately thickened. Chaetotaxy of head as in Tab. 2 a, b, and Figs 8–9. Head with chaetae A, B, C, D, F and G. Chaetae O and E absent. Tubercles Cl and Af separate. Tubercle Af with small nonreticular area between chaetae A and B (Fig. 9). Chaeta D free. Tubercle Dl with 6 chaetae, chaeta Dl3 present. Tubercle (L+So) with 9 chaetae, chaeta So2 absent. Elementary tubercles BE and CD present (Fig. 9). Chaeta A shorter than B. Chaetae Ocp longer than A.
Thorax, abdomen, legs. Body s-chaetae thin and smooth, shorter than nearby macrochaetae (Figs 8, 12). Chaetotaxy of th. and abd. as in Tab. 2 d and in Figs 8, 11. Tubercles Di on th. I absent. Tubercles De on th. II and III with 3 and 4 chaetae respectively. Chaetae De2 on th. II–III and De3 on th. III connected with tubercle De. Chaetae De3 on abd. I–III connected with tubercle De (Fig. 8). Chaetae De2 on th. III and abd. I‒III slightly longer than De3. The line of chaetae De1‒chaeta s perpendicular to dorsomedian line on abd I–III. Furca rudiment with 4 microchaetae (Fig. 12). Abd. IV and V with 8 and 3 tubercles respectively, tubercles Di on abd. V fused. Chaetae L' and Vl on abd. V present. No cryptopygy. Chaetotaxy of legs as in Tab. 2 d. Claw without inner tooth. Tibiotarsi with chaetae B4 and B5 short.
Discussion. E. centaurea is most similar to Endonura saleri Fanciulli & Dallai, 2008 (described from Northeastern Italy), resembling that species in having an unpigmented body and missing O and E chaetae on head. Nevertheless, both taxa are readily distinguished by different number of chaetae Dl on head (in centaurea 6, in saleri 5), presence/absence of pigment on eyes (in centaurea absent, in saleri present), presence/absence of free chaetae De on th. III and abd. I–III (in centaurea absent, in saleri present), number of chaetae (De+Dl+L) on abd. V (in centaurea 6–7, in saleri 8) and presence/absence of microchaetae on furca rudimentary (in centaurea present, in saleri absent).
description: Published as part of Smolis, Adrian, 2016, On the identity of some poorly known species of the genus Endonura Cassagnau, 1979 (Collembola, Neanuridae, Neanurinae), pp. 237-250 in Zootaxa 4173 (3) on pages 241-244, DOI: 10.11646/zootaxa.4173.3.3, http://zenodo.org/record/159328