The cauda (extension of the eighth abdominal segment
) is sharp and siphunculi on the dorsal or lateral surface of sixth abdominal segment
are black towards the apex, much longer that the cauda.
1C): Piriform body, dorsally convex and with the maximum width at the abdominal segment
I level; paled yellow head wider than longer, and with the tylus slightly surpassing the juga; four dark browned spines at the margin of the jugum; rostrum reaching the mesocoxae apex; light browned pronotum with dark browned punctuations in all its surface with a series of punctuations in the middle and basal part of the same coloration; pale yellowed abdomen with its three dark browned mesial plates well defined; pale yellowed legs.
Thorax has dorsal parts almost covered with white waxy materials, primarily along the anterior half and narrowly extending towards the anterior edge of abdominal segment
Present on abdominal segments
3 to 8 in both species, but well defined in U.
Moreover, the members of genus Psychoda are characterized by lateral margins of the first five abdominal segments
with not more than one conspicuous posterior hair and one minute anterior hair (16).
The number and distribution of tritubular ducts on the venter of the abdominal segments
, length and shape of the genitalia and the length and shape of the proximal clavate sensory setae on the antenna were studied.
Alarie Y: Primary setae and pores on the legs, the last abdominal segment
, and the urogomphi of larvae of Nearctic Colymbettnae (Coleoptera: Adephaga: Dytiscidae) with an analysis of their phylo-genetic relationship.
In the case of males (Table 5), the analysis shows that morphometric characters correlated with the first discriminant function are total length, length of cercopod, width of second abdominal segment
and abdominal length.
1st stage larva: Brown and is very active, setaceous form having ten prominent abdominal segments
Occiput and anterior part of 2nd abdominal segment
The easiest practical way to separate true shrimps from true prawns is to examine the second abdominal segment
5B): a little shorter than the distance from the vertex to the posterior apices of the cruciform elevation; base equal to the width of the thorax, slightly tapering; brown tergites; timbal cover bordered with black on the front part; sternites ochre, except the eighth, which is darker brownish; last abdominal segment
light brown; male sternite VIII nearly one anda half times wider than long, anterior margin almost straight, outer margin oblique and slightly concave, posterior margin with non-pronounced invagination, and apices apart from each other (Fig.
One pair of air sacs in the thorax and the other on the seventh abdominal segment
; head with single pair of antennae, characteristic notch at the base of the antennae; at the ventral side of the last abdominal segment
is a tuft of hairs, containing 6-7 bristles, behind which are four well developed anal papillae (Fig.
17 who found abdominal segment
more vulnerable than the thoracic part in cholesterol oxidation products injected NWZ rabbits.
Head, thorax, and legs covered with long dark brown hair; colour of vestiture between metathorax and first abdominal segment
orange, rest of abdomen on dorsal side dark brown with intersegmental tufts of orange hair, ventral half completely dark brown.