Chloeia euglochis Ehlers, 1887

Salazar-Vallejo, Sergio I., 2023, Revision of Chloeia Savigny in Lamarck, 1818 (Annelida, Amphinomidae), Zootaxa 5238 (1), pp. 1-134 : 42

Chloeia euglochis Ehlers, 1887

Chloeia euglochis Ehlers, 1887: 18–21 , Pl. 1, Figs 1 , 2 , Pl. 2, Figs 1–5 , Pl. 3, Figs 1 , 2 , 4 ; Augener 1906: 96; Hartman 1938: 6 (syn.); Hartman 1959: 131; Yánez-Rivera & Salazar-Vallejo 2022: 512–516 , Figs 1A , 4 , 5C–F (redescr., reinst.).

Chloeia modesta Ehlers, 1887: 21–24 , Pl. 2, Figs 6–8 , Pl. 3, Fig. 3 .

Diagnosis. Chloeia with bipinnate branchiae from chaetiger 4, progressively smaller posteriorly; middorsal longitudinal bands crossed by transverse bands (cross-shaped spots); notochaetae harpoon-shaped, without spurs; neurochaetae spurred.

Remarks. Ehlers (1887) informally described C. modesta with smaller specimens and concluded it was the juvenile of C. euglochis ( Ehlers 1887: 21) , but without the rich pigmentation pattern found in the larger C. euglochis in body and chaetae. As indicated elsewhere ( Yáñez-Rivera & Salazar-Vallejo 2022: 514–515), C. modesta is a junior synonym of C. euglochis Ehlers, 1887 . Pigmentation patterns are shown elsewhere ( ARC 2016, Baer 2016, Artmedia 2020).

There are two records of C. modesta for Funchal, Madeira, and a third one from Morocco. Von Marenzeller (1893: 27) had two specimens (37–42 mm long) with strongly furcate chaetae in chaetigers 1–3 but gave no further details. Fauvel (1914: 90) did not indicate the size of his specimens, but indicated that notochaetae were slightly yellowish, and neurochaetae were longer, whitish. However. Fauvel changed his mind because in his monograph on Moroccan polychaetes and after the study of three specimens from three localities (75–122 m water depth), he indicated ( Fauvel 1936: 19): “this species differs slightly from C. venusta and probably it is just a variety of it.” The study of his specimen from station 10 confirms his suspicion (see C. venusta de Quatrefages, 1866 below).

Figures

FIGURE 1. Living specimens of four Philippine species of Chloeia Savigny in Lamarck, 1818. A. C. amphora Horst, 1910, dorsal view. B. C. bemisae sp. n., pink variant, dorsal view. C. Same, reddish and brownish variants, dorsal view. D. C. flava (Pallas, 1766), oblique right dorsal view. E. C. violacea Horst, 1910, oblique left dorsal view (scales not available; photos: Philippe Poppe; © Philippe & Guido Poppe – www.poppe-images.com).

FIGURE 2. Chloeia viridis Schmarda, 1861, non-type specimens (BMNH 1931.6.22.16-18). A. Black form, anterior region, dorsal view. B. Same, chaetigers 10-12, dorsal view (branchiae removed from chaetiger 11). C. Same, posterior region, dorsal view. D. Red form, anterior region, dorsal view. E. Same, chaetigers 12-14, dorsal view (branchiae removed from chaetiger 13). F. Same, posterior region, dorsal view. Scale bars: A, F, 0.9 mm; B, E, 0.7 mm; C, 1 mm; D, 1.2 mm.

FIGURE 3. Chloeia mezianei sp. n., non-type specimen (NHMD 915074). A. Left lateral view. B. Anterior end and pharynx, seen from above. C. Same, right lateral view. Scale bars: A, 1 mm; B, 0.6 mm, C, 0.5 mm.

FIGURE 4. Chloeia fusca M’Intosh, 1885, non-type specimen (UF 4368). A. Ventral view. B. Ventral view after body wall removed. C. Same, after Methyl Green staining. D. Same, lower half of digestive tube removed. (AI, anterior intestine; MB, midventral band (nerve chord); MR, muscular ridge; Oe, oesophagus; PI, posterior intestine; R, rectum; St, stomach). All scale bars: 1 mm.

FIGURE 5. Chloeia bemisae sp. n., paratype, anterior fragment (UF 4388b). A) Chaetiger 3, right parapodium, posterior view, cirriform branchia cut (insets matched: 1, branchial cut tip; 2, branchial basal region; 3, dorsal cirrophore; 4, dorsal cirrostyle tip). B) Chaetiger 5, right parapodium, posterior view (insets matched: 1 and 2, branchial filament tip; 3, dorsal cirrostyle tip) (Br: branchia, DCs: dorsal cirrostyle). Scale bars: A, 0.20 mm; B: 0.38 mm.

FIGURE 6. Chloeia bistriata Grube, 1868, non-type specimens (from UF 4449, 4517). A) Small juvenile (1.4 mm long, 11- 12 chaetigers), dorsal view, depressed by a cover slip. B) Same, dorsal view (* indicates enlarged area of chaetigers 7-8). C) Chaetigers 7-8, right parapodia, seen from above (* convoluted dorsal cirri). D) Larger juvenile, chaetae combed backwards, depressed by cover slip, without posterior region (3.5 mm long, 14-15 chaetigers), after Shirlastain-A staining (5: left notopodium, chaetiger 5; MA: median antenna). E) Same (5: chaetiger 5). F) Same, close-up of anterior region, dorsal view (BB: bipinnate branchia, CB: cirriform branchia, DC: dorsal cirrus). Scale bars: A, 0.23 mm, B: 0.20 mm, C, F: 0.1o mm, D: 0.55 mm, E: 0.50 mm.

FIGURE 7. Chloeia amoureuxi sp. n., holotype (MMSUCO Amp 2). A. Oblique dorsal view. B. Anterior end, left lateral view. C. Median segments, dorsal view. D. Chaetiger 3, notochaetal tips. E. Same, neurochaetal tips. F. Chaetiger 16, harpoon notochaetae. G. Same, neurochaetal tips. H. Posterior region, dorsal view. Scale bars: A, 0.7 mm; B, 0.05 mm; C, 1.5 mm; D, 160 μm; E, 110 μm; F, 180 μm; G, 30 μm; H, 2 mm.

FIGURE 8. Chloeia amoureuxi sp. n., epitoke (MNHN 860.1). A. Anterior region, dorsal view. B. Anterior end, dorsal view. C. Anterior end, right lateral view. D. Posterior region. Scale bars: A, 1.8 mm; B, 0.5 mm; C, 0.6 mm; D, 1.5 mm.