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Egyngolia
''Egyngolia'' is a genus of very small sized Trilobites, that lived during the Lower Cambrian (Atdabanian to Botomian) in what are today the Russia Federation (Siberian Platform, Dzhagdy Mountains), Mongolia, and South Australia. Etymology ''Egyngolia'' has been named after the Egyngolskaya Suite, the type location of the type species of the genus. ''obtusa'' means blunt. Distribution * ''E. obtusa'', Lower Cambrian (Botomian, Egyngolskaya Suite), northwestern Mongolia. * ''E. willochra'', South Australia (Lower Botomian) Description Like other Agnostida the body of ''Egyngolia'' is diminutive, the headshield (or cephalon) and tailshield (or pygidium) are of approximately same size, with 3 thoracic segments in-between. For a member of the Yukoniidae Yukoniidae S. Zhang, 1980 'nom. transl''. et ''emend''. Jell, ''in'' Whittington ''et al''., 1997 ''ex'' Yukoniinae S. Zhang in W. Zhang, Lu ''et al''., 1980is a small family of trilobites, belonging to the Eodiscina. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yukoniidae
Yukoniidae S. Zhang, 1980 'nom. transl''. et ''emend''. Jell, ''in'' Whittington ''et al''., 1997 ''ex'' Yukoniinae S. Zhang in W. Zhang, Lu ''et al''., 1980is a small family of trilobites, belonging to the Eodiscina. Type Genus and species ''Yukonia intermedia'' Palmer 1968 (Plate 2, figures 14, 17–19, 22, 23, 27, 28; text figure 4). Taxonomy The Yukoniidae probably descended from the Tsunydiscidae and gave rise to the Eodiscidae. cited in Description Yukoniidae are typically isopygous, belonging to the Superfamily Eodiscoidea. The narrow glabella The glabella, in humans, is the area of skin between the eyebrows and above the nose. The term also refers to the underlying bone that is slightly depressed, and joins the two brow ridges. It is a cephalometric landmark that is just superior to ... is usually parallel sided, anteriorly rounded and separated from smooth anterior border by broad (''sag''.) preglabellar field which occupies about 25% of cephalic length e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |