Definitions

Carapace costae

• Closely spaced radial ridges, grading from fine to coarse, that become obsolete near umbo and do not cross it (=radial lirae, radial riblets, accessory ribs) (e.g., Conchostraca, especially Estheriellidae, in which valves generally have more than 5 costae). [Moore and McCormick, 1969]
• (Taxon-specific: Order Diplostraca) Closely spaced radial ridges, grading from fine to coarse, not crossing to umbo.
  (syn. radial lirae) [McLaughlin, 1980]

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Citing this glossary: For individual definitions, please cite the specific author(s) of the definition.
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Martin, J.W., N.D. Pentcheff, D. Striley, C. Perrodin, A.R. Wall, J. Wall, and J. Zieba (editors). Crustacea Glossary. Crustacea Department, Natural History Museum of Los Angeles County. Accessed: 21 Nov 2024. URL: https://research.nhm.org/glossary