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Fig. 10. Ircinia jejuensis n in Nine new species of genus Ircinia (Demospongiae: Dictyoceratida: Irciniidae) from Korea

Fig. 10. Ircinia jejuensis n. sp. A, basal part of secondary fibre branch; B, skeletal structure of sponge basement; C, D, primary fibres cored with large and small sands at the base of sponge. Scale bars: AD = 100 μm.

Fig. 5. Ircinia lapillus n in Nine new species of genus Ircinia (Demospongiae: Dictyoceratida: Irciniidae) from Korea

Fig. 5. Ircinia lapillus n. sp. A, entire animal; B, C, skeletal structure in conules; D, cored primary and secondary web; E, choanosome skeletal structure; F, skeletal structure near surface; G, choanosome thick skeletal structure; H, choanosome skeletal structure. Scale bars: A = 2 cm, B, C = 200 μm, D-H = 100 μm.

Fig. 3. Ircinia gapaensis n in Nine new species of genus Ircinia (Demospongiae: Dictyoceratida: Irciniidae) from Korea

Fig. 3. Ircinia gapaensis n. sp. A, entire animal; B, C, skeletal structure in conules; DF, subdermal skeletal structure. Scale bars: A = 2 cm, B, F = 200 μm, C-E = 100 μm.

Fig. 2. Ircinia grobulosa n in Nine new species of genus Ircinia (Demospongiae: Dictyoceratida: Irciniidae) from Korea

Fig. 2. Ircinia grobulosa n. sp. A, entire animal; B, skeletal structure near surface; C, branched secondary fibres; D, cored primary fibres and secondary web; E, F, choanosome skeletal structure. Scale bars: A = 2 cm, B = 200 μm, C-F = 100 μm.

Fig. 1. Ircinia incrustans n in Nine new species of genus Ircinia (Demospongiae: Dictyoceratida: Irciniidae) from Korea

Fig. 1. Ircinia incrustans n. sp. A, entire animal; B, surface skeletal structure; C, closed surface skeletal structure; D, cored primary and secondary fibres; E, F, uncored primary and secondary fibres. Scale bars: A = 2 cm, B = 200 μm, C-F = 100 μm.

Fig. 4. Ircinia gapaensis n in Nine new species of genus Ircinia (Demospongiae: Dictyoceratida: Irciniidae) from Korea

Fig. 4. Ircinia gapaensis n. sp. A, B, choanosome skeletal structure; C, D, perforated fibres at the choanosome. Scale bars: A-D = 100 μm.

Fig. 8. Ircinia munsumensis n in Nine new species of genus Ircinia (Demospongiae: Dictyoceratida: Irciniidae) from Korea

Fig. 8. Ircinia munsumensis n. sp. A, choanosome skeletal structure; B, surface membrane with cored primary fibres; C, branched secondary fibres; D, secondary web. Scale bars: A-D = 100 μm.

Fig. 6. Ircinia bakusi n in Nine new species of genus Ircinia (Demospongiae: Dictyoceratida: Irciniidae) from Korea

Fig. 6. Ircinia bakusi n. sp. A, entire animal; B, skeletal structure in conules; C, subdermal skeletal structure; D, closed skeletal structure; E, cored primary fibres near surface; F, choanosome skeletal structure; G, primary and secondary fibres; H, branched secondary fibres. Scale bars: A = 3 cm, B, C = 200 μm, D-H = 100 μm.

FIGURE 14 in New shallow water species of Caribbean Ircinia Nardo, 1833 (Porifera: Irciniidae)

FIGURE 14. Ircinia cf. reteplana (Topsent, 1923). A: USNM 1641984, B: USNM 1641982, C: USNM 1641981, D: USNM 1641985, E: USNM 1641989.

FIGURE 15 in New shallow water species of Caribbean Ircinia Nardo, 1833 (Porifera: Irciniidae)

FIGURE 15. Histological sections of Ircinia cf. reteplana USNM 1641982. A: Image showing moderately cored secondary fibers. A primary fiber terminates in a conule on the left of the image. B: Two primary fibers running in parallel, connected by a mesh of secondary fibers. A group of spicules is circled below the topmost primary fiber. Note the difference in the degree of coring of secondary fibers between A and B. Annotations follow Figure 3.

FIGURE 3 in New shallow water species of Caribbean Ircinia Nardo, 1833 (Porifera: Irciniidae)

FIGURE 3. Histological sections of Ircinia lowi sp. nov., specimen voucher USNM 1582268 (holotype). Abbreviations: 1°: primary fibers, 2°: fibers, Sp: spicules, Se: sediment grains, Met: symbiotic metazoan, i: irciniid filaments. A: Bands of parallel irciniid filaments are visible throughout the mesohyl, with one plane of bands annotated by the bracket in the upper right-hand quadrant. Large, foreign spicule fragments are highlighted in the bottom right quadrant and at center bottom-left. B: Three primary fibers are joined by secondary fibers. Note the sand grains and spicule fragments in the primary fibers and their near absence from secondary fibers.

FIGURE 8 in New shallow water species of Caribbean Ircinia Nardo, 1833 (Porifera: Irciniidae)

FIGURE 8. Ircinia laeviconulosa sp. nov. A: USNM 1582283 (holoype), B: USNM 1582285 (paratype), C: USNM 1582288 (paratype), D: USNM 1582286 (paratype). Note the variation in oscular position, from a single large osculum (A) to multiple smaller oscula (B-D).

FIGURE 12 in New shallow water species of Caribbean Ircinia Nardo, 1833 (Porifera: Irciniidae)

FIGURE 12. Ircinia ruetzleri sp. nov. A: USNM 1642001 (holotype), B: USNM 1642004 (paratype), C: USNM 1642000 (paratype), D: USNM 1642003 (paratype).

FIGURE 2 in New shallow water species of Caribbean Ircinia Nardo, 1833 (Porifera: Irciniidae)

FIGURE 2. Ircinia lowi sp. nov. A: USNM 1582268 (holotype), B: USNM 1582267 (paratype), C: USNM 1582269 (paratype), D: USNM 1582270 (paratype). Note the wide points of attachment to hard substrate and coral rubble.

FIGURE 11 in New shallow water species of Caribbean Ircinia Nardo, 1833 (Porifera: Irciniidae)

FIGURE 11. Histological sections of Ircinia vansoesti sp. nov. USNM 1641998 (holotype). Abbreviations follow Figure 3. A: Histological section demonstrating low degree of coring in secondary fibers. B: Section showing the higher degree of coring in primary fibers, most notably in the lower of the two primary fibers that runs horizontally across the image.

FIGURE 5 in New shallow water species of Caribbean Ircinia Nardo, 1833 (Porifera: Irciniidae)

FIGURE 5. Histological sections of Ircinia bocatorensis sp. nov. Abbreviations follow Figure 3. A, B: USNM 1582284 (holotype). The holotype was chosen in part due to the success of the histology in demonstrating the variability in the degree of coring observed in the secondary fibers within a given individual of this species. A representative band of parallel irciniid filaments is annotated by the bracket in B. C: USNM 1582289 (paratype). Note the sparse coring of the secondary fibers. D: USNM 1582282 (paratype). This tissue fragment shows the often-parallel orientation of the primary fibers.

FIGURE 10 in New shallow water species of Caribbean Ircinia Nardo, 1833 (Porifera: Irciniidae)

FIGURE 10. Ircinia vansoesti sp. nov. A: USNM 1641998 (holotype), B: USNM 1641996 (paratype), C: USNM 1642006 (paratype), D: USNM 1642013 (paratype).

FIGURE 6 in New shallow water species of Caribbean Ircinia Nardo, 1833 (Porifera: Irciniidae)

FIGURE 6. Ircinia radix sp. nov. A: USNM 1582258 (holotype), B: USNM 1582259 (paratype), C: USNM 1582260 (paratype), D: USNM 1582257 (paratype). All specimens were found growing on Rhizophora prop roots in shaded spots.

FIGURE 9. A,B in New shallow water species of Caribbean Ircinia Nardo, 1833 (Porifera: Irciniidae)

FIGURE 9. A,B: Histological sections of Ircinia laeviconulosa sp. nov., specimen voucher USNM 1582285 (paratype). Abbreviations follow Figure 3.

FIGURE 4 in New shallow water species of Caribbean Ircinia Nardo, 1833 (Porifera: Irciniidae)

FIGURE 4. Ircinia bocatorensis sp. nov. A: USNM 1582284 (holotype), B: USNM 1582289 (paratype) with ophiuroid, C: USNM 1582287 (paratype), D: USNM 1582295 (paratype), E: USNM 1582291 (paratype, brownish) adjacent to I. strobilina (grayish), F: USNM 1582282 (paratype).