FIGURE 1 in Actinarctus doryphorus (Tanarctidae) DNA barcodes and phylogenetic reinvestigation of Arthrotardigrada with new A. doryphorus and Echiniscoididae sequences

FIGURE 1. Actinarctus doryphorus specimens sampled at Roscoff, France, of which the cytochrome c oxidase subunit I (COI), 18S and 28S rDNA fragments were amplified. Light microscopic images of live animals. Characteristics of the species include e.g. telescopic legs (le) with four-terminal toes (to), the cuticular wing-like structure (alae), which contains epicuticular pillars (pi) and a set of head appendages, including external cirri (ec), internal cirri (ic) and primary clavae (pc) (see Persson et al. 2019 for more details). A. Specimen 06, presumably female. B. Specimen 07, presumably juvenile. C. Specimen 08, presumably male. D. Specimen 10, presumably juvenile. E. Specimen 12, female. F. Specimen 17, presumably juvenile. G. Specimen 18, presumably female. H. Specimen 22, presumably male. I. Specimen 23, presumably male. COI was obtained from all specimens, 18S from specimen no. 08, 10, 12, 17 and 18, and 28S from specimen no. 08 and 10. Specimens in A, C, E, F, H and I are seen ventrally, whereas B, D and G are seen dorsally. Anterior is up (and left in D, F). Pharyngeal bulb (pb), sensory organ of the fourth leg (p4). Scale bar = 20 µm in D, F otherwise 30 µm.