Bartels, Paul J.; Fontoura, Paulo; Nelson, Diane R.
Archechiniscus bahamensis Bartels & Fontoura & Nelson 2018, sp. nov.
Marine tardigrades of the Bahamas with the description of two new species and updated keys to the species of Anisonyches and Archechiniscus
FIGURE 2. Archechiniscus bahamensis sp. nov. holotype habitus photos (DIC). A. Dorsal view. B. Ventral view. Scale bars = 20 µm.
FIGURE 3. Archechiniscus bahamensis sp. nov. holotype habitus drawing, dorsal view. cA = cirrus A, cE = cirrus E, e = eye, ec = external cirrus, ic = internal cirrus, L I–IV = legs I–IV, mc = median cirrus, mo = mouth, pc = primary clava, p4 = sensory papilla leg IV, sc = secondary clava. Scale bar = 20 µm.
FIGURE 4. Head region of of Archechiniscus bahamensis sp. nov. holotype showing cuticular punctations (DIC). A. Dorsal view. B. Ventral view, note bifurcations of cirri tips. cA = cirrus A, ec = external cirrus, ic = internal cirrus, mc = median cirrus, mo = mouth, pc = primary clava, sc = secondary clava. Scale bars = 10 µm.
FIGURE 5. A. Buccal apparatus of Archechiniscus bahamensis sp. nov. from specimen with intact stylets, lateral view (DIC). B. Foot III of holotype (DIC) showing internal digits and sessile external claws. C. Legs I–III of specimen showing papillae. D. Leg I of specimen showing sensory spine. ap = accessory point, bs = basal spur, bt = buccal tube, fu = furca, pa = papilla, pe = peduncle, ph = pharynx, pl = placoid, ss = sensory spine, st = stylet. Scale bars = 10 µm.
FIGURE 6. Archechiniscus bahamensis sp. nov. genital anatomy (DIC). A. Photo of a male paratype showing circular gonopore and anus. B. Photo of female holotype showing cuticular platelets and gonopore. Focal plane at ventral cuticular surface. C. Photo of female holotype at deeper focal plane showing seminal ducts. a = anus, ap = anterior platelet, g = gonopore, lp =lateral platelet, sr = seminal receptacle duct. Scale bars = 10 µm.
FIGURE 7. Drawing of Archechiniscus bahamensis sp. nov. female genitalia; an = anus, ap = anterior cuticular platelet, go = gonopore, lp = lateral cuticular platelet, sr = seminal receptacle. Scale bar = 10 µm.