ARCHINEMERTEA, Iwata, 1960

Kajihara, Hiroshi, 2020, Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines, Species Diversity 25, pp. 251-273 : 252

Subclass ARCHINEMERTEA Family Cephalotrichellidae Chernyshev, 2011a Genus Balionemertes Sundberg, Gibson, and Olsson, 2003 Balionemertes cf. australiensis Sundberg, Gibson, and Olsson, 2003 ( Figs 2–6 ; Table 1)

Pilidiophora [sic.] sp.: Kajihara et al. 2007: 125. Balionemertes australiensis: Sundberg et al. 2016 :

Figures

Fig. 2. Balionemertes cf. australiensis Sundberg, Gibson, and Olsson, 2003, photographs taken in life, PNM 4644. A, Anterior portion, dorsal view; head twisted leftward; epidermis on dorsal side largely damaged and exfoliated; B, head, right lateral view; arrowhead showing ocellus in ventral sub-group of anterior eye group; C, anterior end of body, ventral view, showing distribution of black dots.

Fig. 3. Balionemertes cf. australiensis Sundberg, Gibson, and Olsson, 2003, photomicrographs of transverse sections, PNM 4644. A, Posterior foregut region through nephrostome; dotted lines indicate longitudinal muscles associated with lateral nerve cord; arrowhead indicates cells of unknown function; B, anterior foregut region showing inner circular muscles; C, foregut region showing mid-dorsal nerves and longitudinal muscle plate between rhynchocoel and foregut.

Fig. 4. Balionemertes cf. australiensis Sundberg, Gibson, and Olsson, 2003, photomicrographs of transverse sections, PNM 4644. A–C, Precerebral regions; D, proboscis insertion; E, anterior brain region; F, middle brain region just before ventral ganglion bifurcates into superior and inferior lobes; G, posterior brain region; arrowheads indicating nerve fibres leading to buccal nerves sent out antero-ventrally from a commissure between inferior lobes of ventral ganglia.

Fig. 5. Balionemertes cf. australiensis Sundberg, Gibson, and Olsson, 2003, photomicrographs of transverse sections, PNM 4644. A–J, Serial images showing rhynchocoelic valves (indicated by arrowhead) in foregut region; K, proboscis; L, ocellus; M, ovary.

Fig. 6. Balionemertes cf. australiensis Sundberg, Gibson, and Olsson, 2003, three-dimensional reconstructions of medullar fibrous tissue of the nervous system in brain region (i.e., cortical neuronal tissue is omitted); arrowheads indicating nerve fibres leading to buccal nerves sent out antero-ventrally from a commissure between inferior lobes of ventral ganglia. A, Left lateral view; B, dorsal view; C, ventral view; D, right rear view; E, magnification of commissures between inferior lobes of ventral ganglia, left rear view.