antirostrum

antirostrum

[‚an·tē′räs·trəm]
(invertebrate zoology)
The terminal segment of the appendages of certain mites.
References in periodicals archive ?
Three segments perpendicular to the length included the width through the primordium, segment CE, and CE subsegment C-C' (a measure of the gap between the rostrum and antirostrum [point C]).
The saccular otolith of Pogonias stringeri shows a number of characters diagnostic of Sciaenidae, including: a strongly homosulcoid sulcus, with both the rostrum and antirostrum absent; a broad, flat, shallow ostium with a distinct postostial lobe; and a narrow and horizontal cauda with a curved posterior cauda.
Otolith tracing began at the tip of the antirostrum, was directed manually across the base of the rostrum, and then the software traced the posterior portion of the otolith.
fitchi shows a number of characters diagnostic of Sciaenidae including: a strongly homosulcoid sulcus, with both the rostrum and antirostrum absent; a broad, flat, shallow ostium with a distinct postostial lobe; and a narrow horizontal anterior cauda with a curved posterior cauda.
The sulcus is strongly homosulcoid with both the rostrum and antirostrum absent.
The sagittae are characterized by variable growth reticulations along the dorsal edge from the postrostrum to the antirostrum and along the ventral edge from the postrostrum to the rostrum.