Laxus oneistus

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

Laxus oneistus

Neither a dorsal gland nor a dorsal gland ampulla was observed in this species. The subventral gland ampullae are positioned in the corpus at roughly 50% of its length, anterior to the position of maximum corpus width ( Figs. 5m, n and 12a–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.12 Pharynx region of Laxus oneistus, CLSM optical sections, autofluorescence a, b subventral view, c ventral view, d dorso-lateral view, e ventral view. Scalebars 20 μm. b, bulbus; bd, buccal dila- tor; c, corpus; gd, gland duct; i, isthmus; n, nucleus; spm, somato-pharyngeal muscle; va, subventral ampulla; vg, subven- tral gland