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19 results for “Bicornucythere”
FIGURE 7 in A new late Eocene Bicornucythere species (Ostracoda, Crustacea) from Myanmar, and its significance for the evolutionary history of the genus
FIGURE 7. Early Miocene (A) and late Eocene (B) localities of Bicornucythere are represented by solid black symbols. The paleogeography was generated using the online service of the Ocean Drilling Stratigraphic Network (http://www.odsn.de), accessed on September 11, 2013. The late Eocene and early Miocene paleogeographies represent configurations at 35 Ma and 22 Ma, respectively. The grey shading indicates plate fragments. The black line shows today's shoreline. Open white circles represent localities of fossil ostracodes without Bicornucythere. Numbers are references to the localities: 1, Gramann (1975); 2, Bera & Banerjee (1996); 3, Khosla & Nagori (1989); 4, Khosla (1978), Singh (1988); 5, Ahmad et al. (1991); 6, Yeşilyurt et al. (2009); 7, Nazik (1993); 8, Honigstein et al. (2002); 9, Bosboom et al. (2011); 10, Bhandari (1991); 11, Bhandari (1992); 12, This study.
FIGURE 5 in A new late Eocene Bicornucythere species (Ostracoda, Crustacea) from Myanmar, and its significance for the evolutionary history of the genus
FIGURE 5. Measurements of Bicornucythere bisanensis and Bicornucythere concentrica sp. nov. A, SEM images of B. bisanensis in the A, A-1, and A-2 stages. Scale bars = 100 µm. B, Measurements used in the study: valve length (L), valve height (H), and width of marginal infold (WM). Scale bar = 100 µm. C, The 95% confidence intervals of L, H, and WM/L of B. bisanensis and B. concentrica sp. nov. The bars in the A and A-1 stages indicate 95% confidence intervals of the measurements, while the bars in the A-2 stage indicate ranges of the measurements. The open diamonds indicate mean values. The horizontal dotted lines indicate the WM/L ratios of B. concentrica sp. nov. "n" indicates the number of measurements. The measurements and detailed information about B. bisanensis specimens are given in the Appendix.
FIGURE 3 in A new late Eocene Bicornucythere species (Ostracoda, Crustacea) from Myanmar, and its significance for the evolutionary history of the genus
FIGURE 3. Columnar section of the Yaw Formation in the Kyauktakha section (Fig. 2B and 2C) and horizons of the examined samples.
FIGURE 4 in A new late Eocene Bicornucythere species (Ostracoda, Crustacea) from Myanmar, and its significance for the evolutionary history of the genus
FIGURE 4. SEM images of ostracodes and benthic foraminifer from sample 69-1. The arrows point anteriorly. A–I, Bicornucythere concentrica Yamaguchi sp. nov. (A–D), UMUT-CA31128, holotype, carapace, left external view (A), right external view (B), dorsal view (C), and anterior view (D). E–H, UMUT-CA31129, paratype, right valve, external view (E), internal view (F), dorsal view (G), and hingement (H). I, UMUT-CA31131, paratype, carapace, left external view. J, Trachyleberididae gen. et sp. indet.1, right external view of carapace. K, Buntoninae gen. et sp. indet., left external view of carapace. L, Cytheromorpha? sp., right valve, external view. M–O, Ammonia subgranulosa (Jacob and Sastri, 1950), spiral view (K), umbilical view (L), and apertural view (M). Scale bars =100 µm.
FIGURE 1. A in A new late Eocene Bicornucythere species (Ostracoda, Crustacea) from Myanmar, and its significance for the evolutionary history of the genus
FIGURE 1. A, Geological map and the study area. Modified after Morley (2009) and Mitchell et al. (2012). B, Late Eocene geography of Myanmar, simplified from Licht et al. (2013). Abbreviations: Kb = Kabaw fault, IBR = Indo-Burman Ranges.
FIGURE 2. A in A new late Eocene Bicornucythere species (Ostracoda, Crustacea) from Myanmar, and its significance for the evolutionary history of the genus
FIGURE 2. A, Geological map in the vicinity of the Kyauktakha section (B and C). B and C, traverse maps and sample localities.
FIGURE 12 in Morphological types of male copulatory organs of Bicornucythere bisanensis (Ostracoda, Crustacea) and the description of a new Bicornucythere species
FIGURE 12. Bicornucythere misumiensis sp. nov. Internal lateral views of male carapace of left (A) and right (B) valves, respectively (SUM-CO-2505, paratype). Arrows indicate anterior. Scale: 100 µm.
FIGURE 11 in Morphological types of male copulatory organs of Bicornucythere bisanensis (Ostracoda, Crustacea) and the description of a new Bicornucythere species
FIGURE 11. Exposed soft parts and pore systems of Bicornucythere misumiensis sp. nov. A and B, soft parts of female and male, respectively. C–E, male left copulatory organ (ventral view). C, whole image; D, extension of the distal lobe; E, tip of the distal lobe. F, maxillula of male. G–J, pore systems. G and H, corolla-like pore (reported by Okada, 1982 as a Ben-type pore). I, broom-shape seta (black arrow). J, simple seta. A, SUM-CO-2510, paratype; B–F, SUM-CO-2511, paratype; G–J, SUM-CO-2508, paratype. Arrows indicate anterior (A and B). Scale: 100 μm for A and B, 50 μm for C, 30 μm for F, 20 μm for D, 10 μm for I, 2 μm for E and J, 1 μm for G and H.
FIGURE 9 in Morphological types of male copulatory organs of Bicornucythere bisanensis (Ostracoda, Crustacea) and the description of a new Bicornucythere species
FIGURE 9. Appendages of Bicornucythere misumiensis sp. nov. A, antennule. B, antenna. C, mandibula. D, maxillula. E, male right 5th limb. E1, segment boundary in male right 5th limb. E2, faint segment boundary in male right 5th limb. F, female right 5th limb. G, left 5th limb. H, 6th limb. I, 7th limb. J, brush-shaped organ. K, left furca. A, C, J, K SUM-CO-2501, male holotype; B, E, G–I, L, M, SUM-CO-2502, male paratype; D, SUM-CO-2503, paratype; B, F, SUM-CO-2504, female paratype. Scale: 100 μm for A-K, 125 μm for E1, E2.
FIGURE 8 in Morphological types of male copulatory organs of Bicornucythere bisanensis (Ostracoda, Crustacea) and the description of a new Bicornucythere species
FIGURE 8. Male copulatory organs of Bicornucythere misumiensis sp. nov. (SUM-CO-2501, holotype). ca, clasping apparatus; cd, copulatory duct; dl, distal lobe. Scale: 100 μm.
FIGURE 5 in Morphological types of male copulatory organs of Bicornucythere bisanensis (Ostracoda, Crustacea) and the description of a new Bicornucythere species
FIGURE 5. Size distribution of male carapace of Bicornucythere species. Circles = Bicornucythere bisanensis from Aburatsubo Cove; Rhombuses = Bicornucythere bisanensis from Ushimad; Squares = Bicornucythere bisanensis from Misumi-cho; Triangles = B. misumiensis sp. nov. from Misumi-cho.
FIGURE 4 in Morphological types of male copulatory organs of Bicornucythere bisanensis (Ostracoda, Crustacea) and the description of a new Bicornucythere species
FIGURE 4. Diagram of the four Types of male copulatory organs identified in the Aburatsubo Cove samples. Each Type consists of a combination of right and left distal lobes that is, R, r, L, and l.
FIGURE 6 in Morphological types of male copulatory organs of Bicornucythere bisanensis (Ostracoda, Crustacea) and the description of a new Bicornucythere species
FIGURE 6. Morphological variation in the extension degree of the tip of Shape r in Type D and difference from Shape R in Type A. A, specimens from Aburatsubo Cove. B, specimens from Ushimado. The Aburatsubo Cove samples included some specimens from Shape R group, and they were distinguished from Shape r samples based on their elongated sub-triangular outline and tapering curved tip, which differed from the spindle-shaped outline and pointed tip observed in Shape r samples. Each number correlates with a specific specimen from each locality.
FIGURE 7 in Morphological types of male copulatory organs of Bicornucythere bisanensis (Ostracoda, Crustacea) and the description of a new Bicornucythere species
FIGURE 7. Male copulatory organs of Bicornucythere bisanensis. A, after Kajiyama (1913). B, after Okubo (1975). C, modified from Schornikov & Shaitarov (1979). Kajiyama 1913's description did not include a description of the position of the hemipenis. Permission was granted for Okubo (1975). For Schornikov & Shaitarov (1979), the figure has been replaced by a traced version due to difficulties in contacting the journal's editorial office. Scale: 100 μm.
FIGURE 2 in Morphological types of male copulatory organs of Bicornucythere bisanensis (Ostracoda, Crustacea) and the description of a new Bicornucythere species
FIGURE 2. Map showing the locations evaluated in this study. A, Aburatsubo Cove. B, Ushimado. C, Misumi-cho. Misumi-cho is the type locality for Bicornucythere misumiensis sp. nov. and the description of each of these Types and/or species are linked to the type of male copulatory organ and their classification as either B. bisanensis or the new species in this study. Based on a map from CraftMAP (2006).
FIGURE 3 in Morphological types of male copulatory organs of Bicornucythere bisanensis (Ostracoda, Crustacea) and the description of a new Bicornucythere species
FIGURE 3. Typology of the distal lobes of male copulatory organs of Bicornucythere bisanensis from Aburatsubo Cove. Typology is based on the outline and shape of the tip and the right and left distal lobes, and were identified as R and r or L and l, respectively. Scale: 100 μm.
FIGURE 10 in Morphological types of male copulatory organs of Bicornucythere bisanensis (Ostracoda, Crustacea) and the description of a new Bicornucythere species
FIGURE 10. Carapace of Bicornucythere misumiensis sp. nov. A and B, male left and right valves in the external lateral view, respectively (SUM-CO-2501, holotype). C and D, male left and right valves in the internal lateral view, respectively (SUM-CO-2505, paratype). E and F, female left and right valves in the external lateral view, respectively (SUM-CO-2504, paratype). G, male dorsal view (SUM-CO-2506, paratype). H, male anterior view (SUM-CO-2507, paratype). I, process of left valve (SUM-CO-2508, paratype). J, muscle scars of right valve including adductor, frontal (black arrow), and mandibula scars (gray arrow) (SUM-CO-2509, paratype). K, hingement on male right valve (SUM-CO-2509, paratype). L and M, teeth and socket of hingement on male right valve (SUM-CO-2509, paratype). L, anterior element of right hingement. M, posterior element of right hingement. White arrows indicate anterior. Scale: 100 μm for A–H, K, 20 μm for I, J, L, M.
FIGURE 1 in Morphological types of male copulatory organs of Bicornucythere bisanensis (Ostracoda, Crustacea) and the description of a new Bicornucythere species
FIGURE 1. Map showing the locations of previous studies on Bicornucythere bisanensis from the seas around Japan. Locality numbers (1–23) and letters (X, Y) correspond to the list of reports in Table 1. The white map was taken from CraftMAP (2006).
FIGURE 6 in A new late Eocene Bicornucythere species (Ostracoda, Crustacea) from Myanmar, and its significance for the evolutionary history of the genus
FIGURE 6. Interpretative drawing of the hingement of the right valve (Fig. 4H). Scale bar = 100 µm.
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