Tergite IX missing, only indicated by a group of setae; sternite IX strongly reduced, weakly sclerotized, constricted medially.
12.
The thorax underside, the legs, the greater part of the first abdominal sternite and the mesial spot on the second and third are creamy.
13.
Adults of " Parallocorynus " and " Rhopalotria " are peculiarly soft-bodied and possess several characteristic traits : their metathoracal sternite.
14.
The ophisthosoma ( the abdomen ) is composed of 12 segments, each consisting of a fused upper plate ( tergite ) and bottom plate ( sternite ).
15.
Ventrally somites 1 and 2 are more complex; the first abdominal sternite is modified into a pair of Morphologically the pectines are a pair of limbs that function as sensory organs.
16.
In particular, the degree of sclerotization of sternite IX and of the terminal papillae of " M . aglaella " is distinctly weaker than that of " M . paykullella ".
17.
The rounded and recurved anterolateral extensions of the fourth abdominal sternite, which curve up onto the dorsal surface of the segment and are visible in dorsal view, delimiting two round semicircular areas, are unique in Myrmicinae.
18.
The chelipeds are usually robust, and in some the last pereiopod pair has ovate sternum between segments 4 to 8 are usually incomplete, and in the Portunidae, the eighth sternite is usually visible if seen from below and has a penial groove.
19.
Sternite VIII of the males in all but four primitive genera have a rounded membraneous area, covered by a posteriorly directed brush of stiff scales arising from the posterior margin of sternite VII, associated with a platelike, scale-bearing coremata flanking the vinculum.
20.
Sternite VIII of the males in all but four primitive genera have a rounded membraneous area, covered by a posteriorly directed brush of stiff scales arising from the posterior margin of sternite VII, associated with a platelike, scale-bearing coremata flanking the vinculum.
