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FIGURE 4 in Zyzzyzus rubusidaeus (Cnidaria, Hydrozoa, Tubulariidae), a new species of anthoathecate hydroid from the coast of British Columbia, Canada

FIGURE 4. Zyzzyzus rubusidaeus, section of hydrocaulus showing longitudinal canals. Scale equals 0.1 mm.

FIGURE 5 in Zyzzyzus rubusidaeus (Cnidaria, Hydrozoa, Tubulariidae), a new species of anthoathecate hydroid from the coast of British Columbia, Canada

FIGURE 5. Cnidocysts of Zyzzyzus rubusidaeus. A, stenotele, small, from oral tentacle. B, stenotele, large, from aboral tentacle. C, microbasic eurytele, from aboral tentacle. D, desmoneme, from oral tentacle. E, desmoneme, from oral tentacle (differential interference contrast). F, isorhiza, large, from hydranth. G, isorhizas, slender, from gonophore. H, basitrich, from gonophore. I, basitrich, discharged, from gonophore.

FIGURE 1 in Zyzzyzus rubusidaeus (Cnidaria, Hydrozoa, Tubulariidae), a new species of anthoathecate hydroid from the coast of British Columbia, Canada

FIGURE 1. Zyzzyzus rubusidaeus, live aggregation of polyps, from nature. A, entire aggregation (collected 30 March 2012). B, closer view of an aggregation, showing polyps and gonophores (collected 28 February 2012). Photo by Neil McDaniel.

FIGURE 3 in Zyzzyzus rubusidaeus (Cnidaria, Hydrozoa, Tubulariidae), a new species of anthoathecate hydroid from the coast of British Columbia, Canada

FIGURE 3. Zyzzyzus rubusidaeus. Diagrams of polyps. a, gonophores on blastosyle, scale 1 mm. b, female gonophores, scale 0.4 mm. c, base of hydrocaulus with two tubers and young polyp, scale 1 mm. d, smaller polyp showing neck (x) and tubers on lower part of hydrocaulus, scale 1 mm.

FIGURE 2 in Zyzzyzus rubusidaeus (Cnidaria, Hydrozoa, Tubulariidae), a new species of anthoathecate hydroid from the coast of British Columbia, Canada

FIGURE 2. Zyzzyzus rubusidaeus, adult and juvenile polyps. Scale for adult equals 0.5 mm; scale for juvenile equals 0.125 mm.

FIGURE 6 in A comparative study of populations of Ectopleura crocea and Ectopleura ralphi (Hydrozoa, Tubulariidae) from the Southwestern Atlantic Ocean

FIGURE 6. Principal component analyses (PCA) for cnidome (A) and morphology (B). Note that the minimum and maximum cases in A (arrows) do not match with minimum and maximum cases in B. Most similar cases marked by dashed circles.

FIGURE 7. Haplotype parsimony networks for ITS1 in A comparative study of populations of Ectopleura crocea and Ectopleura ralphi (Hydrozoa, Tubulariidae) from the Southwestern Atlantic Ocean

FIGURE 7. Haplotype parsimony networks for ITS1+5.8S (A) and COI (B) for the different populations of Ectopleura crocea and Ectopleura ralphi of the Southwestern Atlantic Ocean. Black circles for the Argentine haplotypes, white ones for Brazilian localities; the sizes of the circles are proportional to the number of localities sharing the haplotype; small black circles represent hypothetical or unsampled haplotypes. Lines connecting circles represent one substitution step. Note that A BO/MP samples differ from JU/PA/BO only by an indel of three base pairs (AAT/– – –). Locality codes are represented inside the circles as MA: Macaé, JU: Juréia, PA: Paraná, BO: Bombas, MP: Mar del Plata.

FIGURE 2 in A comparative study of populations of Ectopleura crocea and Ectopleura ralphi (Hydrozoa, Tubulariidae) from the Southwestern Atlantic Ocean

FIGURE 2. Sampled localities of the specimens used in morphological and molecular analyses. White circles are localities whose samples were used in morphological analyses; black circles for both morphological and molecular analyses; grey circle for molecular analyses only. RJ—State of Rio de Janeiro; SP—State of São Paulo, PR—State of Paraná, SC—State of Santa Catarina.

FIGURE 3 in A comparative study of populations of Ectopleura crocea and Ectopleura ralphi (Hydrozoa, Tubulariidae) from the Southwestern Atlantic Ocean

FIGURE 3. Different types of nematocysts documented under light microscopy. A: O-basitrichous isorhizas, B: basitrichous isorhizas, C: desmonemes, D: large stenoteles, E: small stenoteles.

FIGURE 1 in A comparative study of populations of Ectopleura crocea and Ectopleura ralphi (Hydrozoa, Tubulariidae) from the Southwestern Atlantic Ocean

FIGURE 1. Worldwide distribution of Ectopleura crocea and Ectopleura ralphi (data from Agassiz 1862; Allman 1871; Allen 1900; Torrey 1902; Stechow 1907, 1925; Hargitt 1927; Ewer 1953; Millard 1959, 1966, 1975; Yamada 1959; Rees 1963; Brinckmann-Voss 1970; Calder 1971; Schmidt 1971; Watson 1980, 1982; Migotto & da Silveira 1987; Hirohito 1988; Petersen 1990; Schuchert 1996; Bouillon et al. 2004; Genzano 2005).

FIGURE 5. Histological sections documented under light microscopy. A in A comparative study of populations of Ectopleura crocea and Ectopleura ralphi (Hydrozoa, Tubulariidae) from the Southwestern Atlantic Ocean

FIGURE 5. Histological sections documented under light microscopy. A: transversal section at the base of oral tentacles, where they are still adnate to hypostome. B: transversal section of the oral tentacles showing their circular shape. C: oblique section of the aboral tentacles showing the squared section of the cells constituting that. D: transversal section at distal region of hydrocaulus showing its division into two longitudinal chambers. Legends on figures: HO, hypostome; OT, oral tentacle; AT, aboral tentacle; S, septum; C, chamber; P, perisarc.

FIGURE 4 in A comparative study of populations of Ectopleura crocea and Ectopleura ralphi (Hydrozoa, Tubulariidae) from the Southwestern Atlantic Ocean

FIGURE 4. Morphological traits of gonophores (A–D, scanning electronic microscopy) and actinulae (E, light microscopy). A: Oral-lateral view of the hydranth with its blastostyles of male gonophores. B: Detail of the blastostyles with male gonophores. C: Female gonophore with the apical crests on top. D: Female gonophore liberating an actinula. E: Liberated actinula with capitate aboral tentacles. Legends on figures: Gn, gonophore; Ac, actinulae; S, spadix.