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FIGURE 7 in Hydroids of the genus Sertularella (Cnidaria: Hydrozoa: Sertulariidae) from the Pacific coast of Canada in the collection of the Royal Ontario Museum, with descriptions of four new species

FIGURE 7. Sertularella sacciformis sp. nov., ROMIZ B2341: (A) Hydrothecae and internode showing spiral twists; (B) Detail of hydrotheca; (C) Hydrocaulus section showing ramification and axillary hydrothecae. Scale bars equal 1.0 mm.

FIGURE 4 in Hydroids of the genus Sertularella (Cnidaria: Hydrozoa: Sertulariidae) from the Pacific coast of Canada in the collection of the Royal Ontario Museum, with descriptions of four new species

FIGURE 4. Sertularella coronata sp. nov., ROMIZ B4056: (A) Hydrothecae and gonotheca; ROMIZ B4057: (B) Detail of hydrotheca; (C) Section of hydrocaulus. Scale bars equal 1.0 mm.

FIGURE 3. Sertularella conella, ROMIZ B4029 in Hydroids of the genus Sertularella (Cnidaria: Hydrozoa: Sertulariidae) from the Pacific coast of Canada in the collection of the Royal Ontario Museum, with descriptions of four new species

FIGURE 3. Sertularella conella, ROMIZ B4029: (A) Branch showing hydrothecae; (B) close-up of hydrothecae; (C) gonotheca; (D) detail of gonotheca cusps. Scale bars equal 1.0 mm.

FIGURE 2 in Hydroids of the genus Sertularella (Cnidaria: Hydrozoa: Sertulariidae) from the Pacific coast of Canada in the collection of the Royal Ontario Museum, with descriptions of four new species

FIGURE 2. Sertularella cervicula sp. nov. (A) ROMIZ B4053: Detail of internode and hydrothecae; (B) ROMIZ B4051: Hydrocaulus section showing ramification and axillary hydrotheca. Scale bars equal 1.0 mm.

FIGURE 6 in Hydroids of the genus Sertularella (Cnidaria: Hydrozoa: Sertulariidae) from the Pacific coast of Canada in the collection of the Royal Ontario Museum, with descriptions of four new species

FIGURE 6. Sertularella pacifica sp. nov., ROMIZ B4065: (A) Branch showing hydrothecae; (B) close-up of hydrotheca; (C) gonothecae. Scale bars equal 1.0 mm.

FIGURE 1. Sertularella albida, ROMIZ B4027 in Hydroids of the genus Sertularella (Cnidaria: Hydrozoa: Sertulariidae) from the Pacific coast of Canada in the collection of the Royal Ontario Museum, with descriptions of four new species

FIGURE 1. Sertularella albida, ROMIZ B4027: (A) Branch showing hydrothecae on branchlets and internodes; (B) close-up of branchlet showing the characteristic deeply immersed and alternating hydrothecae. Scale bars equal 1.0 mm.

Fig. 17 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 17. (A-B) Sertularella subantarctica Galea, sp. nov. (continued), hydrothecae from SMNH 123839 (A), and female gonotheca from SMNH 123835 (B). (C-H) Sertularella tenella (Alder, 1857). Portions of stems from the Chilean materials HRG-0359 (C) and HRG-0361 (D), and comparison with the European specimen HRG-1244 (E). Hydrothecae from the same sources (F, G and H, respectively). (I-L) Sertularella valdiviae Stechow, 1923b (part). Portions of colonies from ZMH C11886 (I), ANT XIX/5 ID.91 (J), and ZSM 20050522 (K). Hydrotheca from ZMH C11886 (L). Scale bars: 200 μm (A, F-H, L), 500 μm (B), 1 mm (C-E, I-K).

Fig. 18 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 18. (A-D) Sertularella valdiviae Stechow, 1923b (continued). Hydrothecae from ANT XIX/5 ID.91 (A), ZSM 20050522 (B) and ZSM 20050521 (C). Gonothecae from the latter source (D). (E) Sertularella vervoorti El Beshbeeshy, 2011, internode with hydrotheca. Scale bars: 200 μm (A-C, E), 500 μm (D).

Fig. 8 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 8. (A, B) Sertularella curvitheca Galea & Schories, 2012a. Portion of colony from MHNG-INVE-79665 (A), and hydrotheca from HRG-1178 (B). (C-I) Sertularella fuegonensis El Beshbeeshy, 2011. Colony portions from ZMH C11884 (C), HRG- 0009 (D) and Vervoort (1972, as S. picta) (E). Hydrothecae from ZMH C11884 (F, G), HRG-0009 (H) and Vervoort (1972, as S. picta) (I). (J): Sertularella gaudichaudi (Lamouroux, 1824) (part), colony fragment from ZMH C04172. Scale bars: 200 μm (B, F-I), 1 mm (A, C-E, J).

Fig. 16 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 16. (A-D) Sertularella robustissima Galea, Häussermann & Försterra, sp. nov. Colony fragments from MHNG-INVE-53268 (A) and HRG-0006 (B), and hydrothecae from the same sources (C and D, respectively). (E-G) Sertularella sanmatiasensis El Beshbeeshy, 2011. Portion of colony from ZMH C11560 (E), and hydrothecae from the same source (F) and Blanco [1984, as S. polyzonias (Linnaeus, 1758)] (G). (H-Q) Sertularella subantarctica Galea, sp. nov. (part). Portions of stems from ZMH C04206 (H, I, the same seen from both sides), SMNH 123835 (J) and SMNH 123851 (K). Mode of branching (L). Hydrothecae from ZMH C04206 (M, N), SMNH 123835 (O) and SMNH 123851 (P), and ZMH C04384 (Q). Scale bars: 200 μm (C, D, F, G, M-Q), 1 mm (A, B, E, H-K). ►

Fig. 14 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 14. (A-E) Sertularella mediterranea Hartlaub, 1901. Colony fragments after Genzano (1990) (A) and Mediterranean material HRG-0001 (B). Hydrothecae after Blanco [1967, as S. picta (Meyen, 1834)] (C), HRG-0001 (D), and Mañé Garzón & Milstein (1973, as S. ruguayensis) (E). (F, G) Sertularella microtheca Leloup, 1974. Portion of erect stem (F) and hydrothecae (G) from HRG-1095. (H, I) Sertularella mixta Galea & Schories, 2012a. Portion of colony from MHNG-INVE-79667 (H) and hydrotheca from HRG-0395 (I). (J-L) Sertularella novarae Marktanner-Turneretscher, 1890. Stem fragment (J), hydrothecae (K), and gonothecae (L) from sample ZMB Cni944. (M-P) Sertularella oblonga Galea, Häussermann & Försterra, sp. nov. Portions of colony (M, N), hydrothecae (O) and female gonothecae (P). Scale bars: 200 μm (C-E, G, I, K, O), 500 μm (L, P), 1 mm (A, B, F, H, J, M, N).

Fig. 4 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 4. Sertularella blanconae El Beshbeeshy, 2011. Portion of colony from MHNG-INVE-86243 (A), and comparison with sample HRG-0553 of Sertularella gayi (Lamouroux, 1821) (B). Hydrothecae from HRG-0696 (C), SMNH 123866 (D), Blanco (1976, as S. geodiae) (E), Blanco (1982, as S. conica) (F-H), and comparison with hydrotheca of S. gayi from sample HRG-1006 (I). Scale bars: 200 μm (C-I), 1 mm (A, B).

Fig. 7 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 7. (A-H) Sertularella contorta Kirchenpauer, 1884 (continued). Mode of branching (A). Hydrothecae from NMSZ 1921.143.1351.D (B), SMNH 123884 (C) and ZSM 20050442 (D). Gonothecae from NMSZ 1921.143.1351.C (E), NMSZ 1921.143.1351.D (F), SMNH 123851 (G) and SMNH 123884 (H). (I-L) Sertularella cruzensis El Beshbeeshy, 2011. Colony fragments from holotype (I) and Vervoort (1972, as S. conica) (J). Hydrothecae from the same sources (K and L, respectively). (M, N) Sertularella curta Galea & Schories, 2014. Portion of stem with basal part of a side branch from MHNG-INVE-86236 (M), and hydrotheca from HRG-0721 (N). Scale bars: 200 μm (B-D, K, L, N), 500 μm (E-H), 1 mm (I, J, M).

Fig. 13 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 13. (A-D) Sertularella implexa (Allman, 1888). Colony fragments from holotype material (A) and Vervoort (1972, as S. picta) (B). Hydrothecae from the same sources (C and D, respectively). (E, F, H, I) Sertularella juanfernandezensis Galea, sp. nov. Portions of colonies from SMNH 123883 (E) and ZMB Cni4421 (F), and comparison with S. polyzonias (Linnaeus, 1758) HRG-0550 (G). Hydrothecae from the same sources (H, I and J, respectively). (L, M) Sertularella leiocarpa (Allman, 1888). Portion of colony (L) and hydrotheca (M) from HRG-1056. Scale bars: 200 μm (C, D, H-J, M), 500 μm (K), 1 mm (A, B, E-G, L).

Fig. 6. Sertularella contorta Kirchenpauer, 1884 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 6. Sertularella contorta Kirchenpauer, 1884 (part). Colony fragments from NMSZ 1921.143.1351.C (A), NMSZ 1921.143.1351.D (B), SMNH 123851 (C), SMNH 123884 (D) and ZSM 20050442 (E). Hydrothecae from NMSZ 1921.143.1351.C (F-H) and SMNH 123851 (I). Scale bars: 200 μm (F-I), 1 mm (A-E). ►

Fig. 5 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 5. Sertularella clausa (Allman, 1888). Colony fragments from holotype (A, B), and specimens ZMH C11882 (C) and C12145 (D) assigned to S. argentinica El Beshbeeshy, 2011. Hydrothecae from holotype (E), ZMH C11882 (F), ZMH C12145 (G, H), Blanco (1982, as S. gayi gayi) (I). Scale bars: 200 μm (E-I), 1 mm (A-D).

Fig. 10 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 10. Comparison of the type materials of Sertularella gaudichaudi (Lamouroux, 1824) (A-E) and S. picta (Meyen, 1834) (F-K) illustrated by various authors, as follows: Lamouroux (1924) (A, C), Meyen (1834) (F, H, I), Hartlaub (1901) (G, K), Billard (1909) (D), Billard (1922) (E) and Stechow (1923) (J).

Fig. 3 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 3. (A-G) Sertularella antarctica Hartlaub, 1901. Colony fragments from lectotype (A), HRG-0290 (B) and HRG-0524 (C). Hydrothecae from lectotype (D), HRG-0290 (E), HRG-0524 (F) and HRG-0534 (G). (H, I) Sertularella asymmetra Galea & Schories, 2014. Portion of colony (H) and hydrotheca (I). Scale bars: 200 μm (D-G, I), 1 mm (A-C, H).

Fig. 1 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 1. (A, B) Sertularella allmani Hartlaub, 1901. Two holotype slides of Sertularia secunda Allman, 1888 (= Sertularia unilateralis Allman, 1888). (C) Sertularella blanconae El Beshbeeshy, 2011, material identified as S. gayi (Lamouroux, 1821) by Jäderholm (1903). (D) Sertularella clausa (Allman, 1888), holotype slide. (E, F) Sertularella contorta Kirchenpauer, 1884 identified as S. polyzonias (Linnaeus, 1758) by Jäderholm (1910) (E) and S. lagena Allman, 1876 by Stechow (1925) (F), respectively. (G) Slide material studied by Jäderholm (1905), containing S. contorta (colony on the left-hand side) and S. subantarctica Galea, sp. nov. (colony on right-hand side), the latter identified by him as S. allmani. (H-K) Sertularella gaudichaudi (Lamouroux, 1824). Slide materials identified as S. picta (Meyen, 1834) (H), S. antarctica Hartlaub, 1901 (I) and S. protecta Hartlaub, 1901 (J) by Jäderholm (1903); as S. protecta by Stechow, according to Rees & Thursfield (1965) (K).

Fig. 15 in Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species

Fig. 15. (A-E) Sertularella patagonica (d'Orbigny, 1842). Portion of fertile colony after Genzano (1990, as S. striata Stechow, 1923b) (A), Blanco (1967, as S. atlantica Stechow, 1920) (B), Blanco (1974, as S. striata) (C, D), and Millard (1964, as S. striata) (E). (F, G) Sertularella pauciramosa Galea & Schories, 2014. Portion of colony from MHNG-INVE-86235 (F) and hydrotheca from HRG-0717 (G). (H) Sertularella quadrispinosa Watson, 2003, redrawn after original. (I-M) Sertularella recta Galea & Schories, sp. nov. Portions of colonies from MHNG-INVE-79627 (I) and ZMH C11895 (J). Hydrothecae from the same sources (K and L, respectively). Portion of fertile colony with gonotheca from MHNG-INVE-79627 (M). N-R Sertularella robusta Coughtrey, 1876. Colony fragments from HRG-0356 (N), Blanco [1963, as S. tenella (Alder, 1857)] (O) and NMSZ 1959.33.499 (P). Hydrothecae from former and latter sources (Q and R, respectively). Scale bars: 200 μm (G, H, K, L, Q, R), 500 μm (M), 1 mm (A-F, I, J, N-P).