Sexual Di-morphism in cockroach
Sr.
No.
|
Male Cockroach
|
Female Cockroach
|
1.
|
Presence
of anal style in the last segment is an important sexual dimorphic character.
|
Absence
of anal style in the last segment
|
2
|
Antennae
longer than the body.
|
Antennae
longer than the body.
|
3.
|
Three
podomers of antenna are smaller
|
Third
podomers are smaller than 2nd podomer.
|
4.
|
Abdomen
is long, narrow and dorso-ventrally flattened.
|
Abdomen
is short, larger and broad.
|
5.
|
Wings
are long and large, extending beyond the length of the body.
|
Wings
are short and narrow i. e. smaller than a body.
|
6.
|
Male
genital opening present at 9th and 10th segment
|
Female
genital opening present in between the 6th and 9th segments.
|
7
|
Abdomen
Long
|
Abdomen
short and narrow
|
8
|
Abdomen
shows nine distinct segments.
|
Only
seven abdominal distinct segments.
|
