FIGURE 4 in Two newly recorded invasive alien ascidians (Chordata, Tunicata, Ascidiacea) based on morphological and molecular phylogenetic analysis in Korea*

FIGURE 4. Ascidiella aspersa: A, B, Individuals densely aggregated on a rope; C, Individuals on the dock wall; D, Right side; E, Left side; F, Sagittal section of branchial sac; G, Oral siphon; H, Atrial siphon; I, Dorsal tubercle; J, Stigmata; K, Anus and gonoduct; L, Individuals. 1—oral siphon, 2—atrial siphon, 3—endostyle; 4—branchial sac, 5—stigmata, 6—esophagus, 7—stomach, 8—intestine, 9—gonads, 10—testis, 11—gonoduct, 12—rectum, 13—anus, 14—dorsal tubercle, 15—body muscles, 16—reddish pigments, 17—tentacles, 18—tunic, 19—parasitic amphipods. Scale bars: A—F, L. 10 mm; G—K. 1 mm.