Robbea judithae

Pröts, Philipp, Novotny-Diermayr, Veronica & Ott, Jörg A., 2024, A novel three-part pharynx and its parallel evolution within symbiotic marine nematodes (Desmodoroidea, Stilbonematinae), Organisms Diversity & Evolution 24 (3), pp. 353-373 : 363

Robbea judithae , R. lotti and R. weberae

The ampulla in the dorsal sector is positioned at the anterior end of the corpus in all three species ( Figs. 4c, d, 5d–f and 8a, c ). The ampullae at the end of the subventral gland ducts open into the isthmus at a short distance from the posterior end of the corpus, slightly posterior to the anterior-most nuclei of the isthmus ( Figs. 8b, d, e and 9a–c ).

Figures

Fig. 5 Dorsal and subventral gland ampullae. Anterior on the left side. a Catanema schiemeri, CLSM optical section, autofluorescence, corpus, b Catanema schiemeri, TEM micrograph, corpus c Catanema schiemeri, CLSM micrograph, isthmus, musculature in orange, nuclei in blue d Robbea lotti, CLSM optical section, musculature in orange, nuclei in blue, corpus e Robbea weberae, CLSM optical section, musculature in orange, nuclei in blue, corpus f Robbea judithae, CLSM optical section, musculature in orange, nuclei in blue, corpus g Cyathorobbea hypermnestra, CLSM optical section, musculature in orange, corpus h Cyathorobbea hypermnestra, TEM micrograph, corpus i Cyathorobbea hypermnestra TEM micrograph, anterior isthmus j Cyathorobbea ruetzleri, CLSM optical section, musculature

Fig. 8 Pharyngeal region, CLSM optical sections, dorsal and subventral ampullae, musculature in orange, nuclei in blue a, b Robbea weberae, c, d Robbea lotti, e Robbea judithae. Scalebars a, b, d, e 20 μm; c 10 μm. c, corpus; da, dorsal ampulla; gd, gland duct; i, isth- mus; va, subventral ampulla

Fig.9 Pharyngeal region, subventral ampullae. Musculature in orange, nuclei in blue a Robbea lotti, CLSM optical section b Robbea judithae, volume rendering c Robbea weberae, CLSM optical section. Scalebars 20 μm. b, bulbus; c, corpus; gd, gland duct; i, isthmus; n, nucleus; sm, somatic muscle; sp, spiral muscle; va, subventral ampulla