Cytheroidea Baird 1850

Figure 2. Carapaces of Parvocythere gottwaldi sp. n. Holotype (SUM-CO-2023). A right external view B left external view. Each of the carapace structures are transmitted images. Scale bar indicates 100 µm.

Figure 1.Elpidium merendonense sp. n., male. A Left valve, internal view B left valve, internal view, detail of postero-ventral margin C left valve, internal view, detail of antero-ventral margin D right valve, internal view E right valve, internal view, detail of antero-ventral margin F right valve, internal view, detail of postero-ventral margin G right lateral view H dorsal view I ventral view. A–F holotype, MZUSP 29072; G paratype, MZUSP 29077; H paratype, MZUSP 29078; I paratype, MZUSP 29079. Scale bars: 100 µm.

Figure 3. Carapaces of Parvocythere gottwaldi sp. n. A–D, G and H male specimens: A and B paratype (SUM-CO-2025) C and D paratype (SUM-CO-2026) G paratype (SUM-CO-2027) H paratype (SUM-CO-2028). A left external lateral view B right external lateral view C internal view of left valve D internal view of right valve G dorsal view H ventral view. E and F female specimens: E paratype (SUM-CO-2039) F paratype (SUM-CO-2040). E left external view F right external view. Scale bar indicates 100 μm.

Figure 2.Elpidium merendonense sp. n. A Antennula B Antenna C terminal segment of antenna D Mandibula E Mandibular palp F Maxillula A–B, F male specimen, holotype, MZUSP 29072 C female specimen, allotype, MZUSP 29073 D–E male specimen, paratype, MZUSP 29075. Scale bars: A–B, D–F: 50 µm; C: 20 µm. Ya = aesthetasc on terminal segment of A1. Y = aesthetasc on penultimate segment of antennae. hy = hyaline organ on second antennae.

Figure 4. Appendages of Parvocythere gottwaldi sp. n. A–D, F and G holotype (SUM-CO-2023) E paratype (SUM-CO-2024). A antennula B antenna C1 coxa of mandibula C2 palp of mandibula D palp and endites of maxillula E branchial plate of maxillula F fifth limb G sixth limb. Scale bar indicates 50 µm.

Figure 3.Elpidium merendonense sp. n. A First thoracic leg B second thoracic leg C third thoracic leg D Hemipenis E Abdomen. A–D male specimen, holotype, MZUSP 29072 E female specimen, allotype, MZUSP 29073. Scale bars: A–C: 50 µm; D: 100 µm; E: 200 µm. DL = distal lobe on hemipenis. cop = copulatory process on hemipenis. CR = caudal ramus. GeO = genital operculum.

Figure 5. Male copulatory organs of Parvocythere gottwaldi sp. n. Holotype (SUM-CO-2023). A external view of left organ B external view of right organ. Copulatory ducts are shaded. Abbreviation: Dr dorsal ramus Vr ventral ramus Dl Distal lobe. Scale bar indicates 50 µm.

Figure 4.Elpidium merendonense sp. n., female. A Left valve internal view, general B left valve internal view, detail of postero-ventral margin C left valve internal view, detail of antero-ventral margin D right valve internal view, general E right valve internal view, detail of antero-ventral margin F right valve internal view, detail of postero-ventral margin G right lateral view H dorsal view I ventral view. A–F paratype, MZUSP 29076; G paratype, MZUSP 29080; H paratype, MZUSP 29081; I paratype, MZUSP 29082.Scale bars: 100 µm.

Figure 6. Caudal part of female of Parvocythere gottwaldi sp. n. Dorsal view (paratype, SUM-CO-2038). Arrows indicate openings. Scale bar indicates 50 µm.

Figure 7. Carapaces of Parvocythere gracilis sp. n. Holotype (SUM-CO-2050). A right external view B left external view. The carapace structures are transmitted images. Scale bar indicates 100 µm.

Figure 8. Carapaces of Parvocythere gracilis sp. n. A–D and H male specimens: A paratype (SUM-CO-2051) B paratype (SUM-CO-2052) C and D paratype (SUM-CO-2053) H paratype (SUM-CO-2054). A left external lateral view B right external lateral view C internal view of left valve D internal view of right valve H ventral view. E–G female specimens: E paratype (SUM-CO-2059) F paratype (SUM-CO-2059) G paratype (SUM-CO-2060). E left external view F right external view G dorsal view. Scale bar indicates 100 μm.

Figure 9. Appendages of Parvocythere gracilis sp. n. Holotype (SUM-CO-2050). A antennula B antenna C1 coxa of mandibula C2 palp of mandibula C3 proximal part of mandibular palp D maxillula E fifth limb F sixth limb. Scale bar indicates 50 µm.

Figure 10. Male copulatory organs of Parvocythere gracilis sp. n. Holotype (SUM-CO-2050). A internal view of left organ B external view of right organ. Copulatory ducts are shaded. Abbreviation: Dr dorsal ramus Vr ventral ramus Dl Distal lobe. Scale bar indicates 50 µm.

Figure 11. Caudal part of female of Parvocythere gracilis sp. n. Dorsal view (paratype, SUM-CO-2058). Arrows indicate openings. Scale bar indicates 50 µm.