Definitions

Generally blunt projection of carapace, often broader than spine.
See: Carapace teeth, Stomatopod integumental ornamentation [McLaughlin, 1980]
Small sharp spinous projection in varied locations — named types:
a) cardiac. Tooth on mid-line of carapace just behind cervical groove.
b) gastric. Tooth on mid-line of carapace just in front of cervical groove.
c) lateral. Tooth placed on lateral margin of carapace (includes anterolateral, mediolateral, posterolateral teeth).
d) orbital. Tooth on orbital margin.
e) posterior. Tooth on mid-line of carapace just in front of posterior margin between it and marginal groove.
f) pregastric. Tooth on mid-line of carapace between gastric tooth and rostrum.
g) rostral. Tooth on rostrum; may be single (e.g., scyllarid palinurans) or multiple and classified as upper, lower or lateral (e.g., nephropid astacideans and natantian crabs). [Moore and McCormick, 1969]