sternacostal
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basisternum — n. [L. basis, base; sternum, breastbone] (ARTHROPODA: Insecta) That part of a thoracic sternum anterior to the sternacostal suture and/or the sternal apophyses; sternannum; antesternite; see furcasternum … Dictionary of invertebrate zoology
sternellum — n. [Gr. dim. sternon, chest] (ARTHROPODA: Insecta) A part of the eusternum posterior to the sternacostal suture … Dictionary of invertebrate zoology