Tectocepheus velatus, , Nubel-Reidelbach, 1994

Pfingstl, T. & Krisper, G., 2011, No Difference In The Juveniles Of Two Tectocepheus Species (Acari: Oribatida, Tectocepheidae), Acarologia 51 (2), pp. 199-218 : 207-215

Tectocepheus velatus redescription

Larva — Body length (N = 5): 157 – 179 µm, average 168 µm.

Gastronotic region — 12 pairs of notogastral setae present. Setae c 1 – 3, da – dp, la – lp and h 1.

Ventral region of the idiosoma - epimeral setation (I-III): 3-1-2. Seta h 3 short, seta h 2 conspicuously long and solid, both acuminate. Porous areas located on apodemes 2, sejugal and 3.

Legs — setation see Table 1.

Acarologia 51(2): 199–218 (2011)

Protonymph — Body length (N = 19): 200 – 237 µm, average 224 µm.

Prodorsum — median prodorsal ridges assuming shape of definitive lamellae. Translamella distinct ridge.

Gastronotic region ( Figure 12a ) — 15 pairs of notogastral setae, setae p 1, p 2 and p 3 added in this stage.

Ventral region of idiosoma - One pair of genital setae. Epimeral setation (I-IV): 3-1-2-1. Median divided mentotectum; lobes variable in shape; same variation as in T. sarekensis nymphs. From this stage irregularly shaped round and slightly elevated spots dispersed over median area between epimeral plates.

Legs ( Figures 13a–d ) — setation see Table 1.

Deutonymph — Body length (N = 12): 237 – 286

µm, average 272 µm.

Gastronotic region ( Figure 12b ) — 15 pairs of notogastral setae.

Ventral region of idiosoma ( Figure 12c ) — Adanal setae ad 1 –ad 3. Three pairs of genital setae (no variation). One pair of short aggenital setae. Formula of epimeral setation (I-IV): 3-1-2-2.

Legs — Setation see Table 1.

Tritonymph — Body length (N = 8): 289 – 341

µm, average 321 µm.

Gastronotic region ( Figure 14a ) — 15 pairs of notogastral setae.

Ventral region of idiosoma ( Figures 12d and 14b ) — Anal setae an 1 and an 2 on median margin of anal valves. Five pairs of genital setae (constant). Epimeral setation (I-IV): 3-1-2-3.

Legs ( Figures 15 a-d) — solenidia and chaetome see Table 1.

Figures

FIGURE 12: T. velatus. a – protonymph dorsal view; b – deutonymph dorsal view; c – deutonymph ventral view; d – tritonymph ventral view.

FIGURE 13: T. velatus protonymph right legs antiaxial view. a – leg I; b – leg II; c – leg III; d – leg IV.

FIGURE 14: T. velatus LM-micrographs of tritonymph. a – dorsal view, layered from 17 sequentially focused images; b – ventral view, 11 layered images. Scale bar = 50µm

FIGURE 15: Figures 15: T. velatus tritonymph right legs antiaxial view. a – leg I; b – leg II; c – leg III; d – leg IV.