Ilex geophila Delamare Deboutteville 1948

Isotominella geophila Delamare Deboutteville, 1948

(Figs. 2 A–G, 3A–D)

Isotominella geophila Delamare Debouteville, 1948: 402 –404 (Figs. 184–194).

Type locality. Original data: “ Le Banco (C.I.) X 2, litière de souris, 7-VII-45, 2 ex. dont 1 adulte, type: Mus. Paris. — Azaguié T 29, 31 -VIII-45 avec Acanthotermes acanthothorax, 1 ex. var. pilosa ". Ivory Coast. The type material could not be found in Paris (L. Deharveng, personal communication).

Diagnosis. Body elongate, without pigment; abdominal segments V–VI fused, separated from abdominal segment IV; anal spines absent; integument with primary granulation; eyes absent; PAO oval, neither divided nor constricted (Fig. 2 B); antennal segment IV without apical bulb, sensilla slightly thickened, and with subterminal peg organ accompanied by a specialised curved seta (Fig. 2 B, C); labrum with 2/554 setae (Fig. 2 D); labial palp with rod-like A and B papillate setae (Fig, 2F); S-chaetotaxy: 33/22223(s), 10/100 (ms). Sensilla on abdominal tergite I–IV in p-row, except the lateral sensillum on abdominal tergite III, anterior to p-row; anterior S-setae (as) absent on abdominal tergite V (Fig. 3 C); unguiculus present; furcal complex present; dens posterior basally crenulated; mucro bidentate.

Locality. The specimens examined were found in Algeria on the Edough Massif, from moss on soil, taken in January 2002, collector Salah Hamra-Kroua, in the forest of Zen oak of Edough mountains (Seraidi village), located at 14 km in the North-West from Annaba town. Coordinates 36°55’ N, 07°40’ E, elevation 750 m.

Material examined. One female and one juvenile on slide AR0 VII02-06 a; one male on slide AR0 VII02-06 b; one female on slide AR0 VII02-09; two males on slide AR0 VII02-12; one female on slide AR0 VII02-13; six specimens in ethyl alcohol (AR0 VII02-06 -T). Material deposited in the Museum of Zoology, University of Navarra (MZNA).

Description. Body length: maximum 0.8 mm for males and 1.5 for females. Lacking pigment, integument with only primary granulation. Habitus elongate, abdominal V and VI fused, similar in length to the fourth (Fig. 2 A). Eyes absent. PAO broad, not constricted, its length half the width of antennal segment I (Fig. 2 B). Antennae slightly longer than head. Antennal segments I, II, III and IV ratio 1:1.5:1.5:2.7. Antennal segment I with two short ventro-external S-setae of equal length and width, and one basal minute microseta; antennal segment II with a distal ventro-external S-seta, and four basal microsetae; antennal segment III with the usual sensory organ with five S-setae (two bent) and without basal microsetae; antennal segment IV without apical bulb, one specialised curved sensilla near apex, with an adjacent peg, eight moderately thickened S-setae, and a basal microseta (Figs. 2 B–C).

Labrum with 2 prelabral and 5,5,4 labral setae. Clypeus with four setae (Fig. 2 D). Mandible slightly asymmetrical each with 3 or 5 teeth (Fig. 2 E). Maxillary palp simple, with two sublobal hairs (slh following Potapov 2001), and a basal seta. Labial palp with rod-like A and B papillate setae, and 13 accessory guard labial setae (Fig. 2 F). Labium with four proximal, four basomedial and five to six basolateral setae. Maxillary capitulum with two teeth; all lamellae, except lamella 5, longer than the capitulum (Fig. 2 G).

Tibiotarsus without T setae and without elongate or clavate tenent hair. Unguis without inner teeth, but with an external lateral tooth. Unguiculus present and with basal lamella (Fig. 3 A).

Ventral tube with 6–7+6–7 laterodistal and 4 posterior setae in males, 8–11+8–11 laterodistal and 8 posterior setae in females. Retinaculum with 4+4 teeth and one seta on corpus. Manubrium with 3–4+3–4 anterior setae in females, 1–2+ 1–2 in males, always with distal seta thickened, and with about 30–32 setae (females) and 26 (males) on posterior side. Dens with 13 setae on anterior side, and 4 setae on the crenulated part of posterior side (Fig. 3 B). Mucro bidentate. Manubrium: dens: mucro ratio = 4: 4: 1 (Fig. 3 B).

The differences in the chaetotaxy of manubrium and ventral tube between females and males are constant (three females and three males studied), and may represent secondary sexual characters related to the size difference.

relation co-ocurrence with I. geophila. Characters that differ from I. geophila in bold. * Denotes presence on some species in the genus only.)

pigmented); 0 no,,) 0 no 0;, absent) no, 0; yes absent) 0, absent); no) 0, weakly on base) sensilla; 1, (yes) fused present, III 1 (, present;; 0,) pair one; (1, yes;

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very) short; (, 2; 0 1, () absent IV absent) Abd on (, 0 (, 2 Pigmentation without 0, pigment, (shape Furca 0 dentes Crenulated (, 1 subdivided PAO hair clavate Tenent Macrosetae well; present, 0, (1 segment Antennal, (0,; 1 present 3 accp S-Setae () Abdominal VI – V setae abdominal Foil on Mid tergal position of Postero-lateral S-Setae on Number S-setae of Anterior as (S-Setae) Anus (terminal, position 1 Manubrial setae anterior than one), pair more 1 more Dens with 6 than teeth Mucro number Characters not shared C ry p t o py g u s 0* 0 0 0 1 1* 0 0 1 0 1 1 3 1 0 1 1 2* 8–11 Willem, 1901 H em i so t o m a 1 1 2 1 0 1 0 0 1 1 1 0 3 1 1 0 1 2 10 Bagnall, 1949 P ro i s ot om o d es 0* 1 2 0 0 1* 1 1 1 0 0 0 3 0 1 0 1 2 5–7 Bagnall, 1949 C yl i nd ro p yg u s 0 0 0 0 0 1 1 1 1 0 1 1 3 0 0 0 1 3 8 Deharveng et al., 2005 Dagamaea Yosii, 0* 0 0 0* 0 1 1 0 1 0 1* 0 2* 0 1 1 0 2 2–6 1965 I so t o mi ne l l a 0 0 1 0 0 1 1 0 1 0 0 0 2 0 1 1 1 2 D el a m ar e Debouteville, 1948

Chaetotaxy. The number of axial setae (rows) on tergites 15, 9 / 6, 4, 5, 7, 8. Macrosetae shorter than the tergite length and pointed, longest distally. Macrochaetotaxy: 1,1/3,3,3,4 on each side (Fig. 3 C). Abdominal tergite V with 6 and VI with 13 macrosetae (Fig. 3 D). Sensilla nearly as long as common setae. Sensillary formula: 3,3/2,2,2,2,3 (s), 1,0/1,0,0 (ms) (Fig. 3 C). Medial accp-sens in p-row on thorax II to abdominal tergite IV; abdominal tergite III lateral sensilla anterior to p-row. Sensilla on abdominal tergite V not thickened, ventro-lateral one small and short, axial ones long, very similar to normal setae (Fig. 3 D). No ventral setae on thorax.

Discussion. The Cryptopygus complex is defined by the fusion of abdominal segments V and VI, presence of PAO, generally absence of anal spines and lack of morphological modification of abdominal segments V and VI (Rusek, 2002; Deharveng et al., 2005) It comprises the genera: Cryptopygus Willem, 1901, Hemisotoma Bagnall, 1949, Proisotomodes Bagnall, 1949, Cylindropygus Deharveng, Potapov and Bedos, 2005, Isotominella Delamare Debouteville, 1948 and Dagamaea Yosii, 1965. It is possible to separate Isotominella from the other genera by the dens morphology, smooth in Cryptopygus, Cylindropygus and Dagamaea, completely crenulated in Hemisotoma, and Proisotomodes, and only crenulated in the basal posterior half in Isotominella. Table 1 lists the important diagnostic characters for the genera of the Cryptopygus group.