ENTO 301 Lecture 2

Flashcards about insect morphology, segmentation, and tagmosis.

Segmentation and tagmosis

A series of segments, the metameres, which are grouped into three distinct regions or tagmata: head, thorax, and abdomen.

Tagmosis

Amalgamation of segments into functional units.

Tergum

Dorsal plate, tergite.

Sternum

Ventral plate, sternite.

Pleuron

Side plate, pleurite (membrane in abdomen, sclerotized in thorax).

Pregenital segments

First 7 abdominal segments; similar in structure.

Genital segments

Abdominal segments 8 and 9.

Postgenital segments

Abdominal segments 10 and 11.

Pterothorax

Wing bearing, mesothorax + metathorax.

Legs

Fore legs (prothorax), Mid Legs (mesothorax), and Hind Legs (metathorax).

Leg components

Coxa + trochanter + femur + tibia + tarsus + pretarsus.

Remigium

Powered by thoracic muscles.

Clavus

Anal area + jugal area.

Fold-lines

Along which wing can be folded.

Flexion-lines

At which wings flexes during flight.

Axillary area

Muscle attachment site.

Head

Consists of 6 fused segments: preantennal (ocular), antennal, labral, mandibular, maxillary, labial.

Mouthparts

Appendages of head segments 3-6.

Ocelli

Light/dark sensor.

Antennae

Olfactory, tactile, movement.

Antennae components

Scape, pedicel, and flagellum.