Sterninae का एक जीनस

Noun:

उरास्थि, गर्दन सप पेट तक की हड्डी,

sterna's Usage Examples:

Genera: (a) Anas, Mergus, Phaethon, Plotus; (b) Rhyncops, Diomedea, Alca, Procellaria, Pelecanus, Larus, Sterna, Colymbus.

- Opisthosoma without trace of separate terga and sterna, the segmentation merely represented posteriorly by slight integumental folds and the sterna of the 1st and 2nd somites by the opercular plates of the pulmonary sacs.

No distinct respiratory stigmata behind the sterna of the 1st and 2nd somites of the opisthosoma.

- Procellaria, Diomedea, Larus, Sterna, Rhynchops.

[sterna.

The first and second abdominal sterna are often suppressed or reduced, on account of the strong development of the hind-legs.

In the abdominal exoskeleton the segmental structure is very clearly marked, a series of sclerites - dorsal terga and abdominal sterna - being connected by pale, feebly chitinized cuticle, so that considerable freedom of movement between the segments is possible.

- This is an important tribe of beetles, including families with four malpighian tubes and only five or six abdominal sterna, while in the thorax there is a backwardly directed process of the prosternum that fits into a mesosternal cavity.

They may be distinguished from the Malacodermata by the presence of only five or six abdominal sterna, while six malpighian tubes are present in some of the families.

Lameere's classification is founded on the number of abdominal sterna, the nervuration of the wings, the number of malpighian tubules (whether four or six) and other structural characters.

sterna's Meaning':

a genus of Sterninae