The first or anterior segment of the thorax in insects. See Illusts. of Butterfly and Coleoptera.
The anteriormost segment of the thorax, which bears the first pair of legs but no wings. [drawing
the first of the three segments of the thorax
the first segment of the thorax behind the head, abbreviated as T1.
the thoracic segment located closest to the head.
the second or intermediate region of the insect body bearing the true legs and the wings, made up of three rings, named in order, pro-, meso-, meta-.
the first segment of the thorax and that bearing the first pair of legs, if legs are present
The anterior of the three thoracic segments.
the anterior part of an insect's thorax; bears the first pair of legs
small first segment of thorax; just after head and before larger thoracic area with wings.
The first segment of the thorax, it bears the anterior or first pair of legs but no wings.
The first of the three primary subdivisions of the thorax, composed of the pronotum, the propleuron, and the prosternum.
the first thoracic segment, or portion of the thorax nearest the head. The prothorax bears an anterior pair of legs but does not bear wings. See mesothorax and metathorax. View image
first thoracic segment; segment to which head attaches.
The first thoracic ring or segment; it bears the anterior legs but no wings in adult insects.
Firstthoracicsegment bearing the first pair of legs but no wings.
The first thoracic segment bearing the first pair of legs.
the front part of an insect thorax which includes the attachment points for the front legs
anterior and wider portion of thorax when it is divided into prothorax and narrower, posterior opisthothorax, as seen in some Redlichiida.
The prothorax is the foremost of the three segments in the thorax of an insect, and bears the first pair of legs. Its principal sclerites (exoskeletal plates) are the pronotum (dorsal), the prosternum (ventral), and the propleuron (lateral) on each side. The prothorax never bears wings in extant insects, though some fossil groups possessed wing-like projections.