can parents call statutory rape with a 16 year old girl with a 17 year old girl

Yes its possible; however, in Texas it would be called "Indecency with a child." If she is sixteen, she is not at an age of consent, this makes sexual contact or intercourse illegal. She is still a minor and her parents are liable and responsible for her actions.

§ 21.11. INDECENCY WITH A CHILD. A person commits an
offense if, with a child younger than 17 years and not the person's
spouse, whether the child is of the same or opposite sex, the
person:
(1) engages in sexual contact with the child or causes
the child to engage in sexual contact; or
(2) with intent to arouse or gratify the sexual desire
of any person:
(A) exposes the person's anus or any part of the
person's genitals, knowing the child is present; or
(B) causes the child to expose the child's anus
or any part of the child's genitals.
(b) It is an affirmative defense to prosecution under this
section that the actor:
(1) was not more than three years older than the victim
and of the opposite sex;
(2) did not use duress, force, or a threat against the
victim at the time of the offense; and
(c) In this section, "sexual contact" means the following
acts, if committed with the intent to arouse or gratify the sexual
desire of any person:
(1) any touching by a person, including touching
through clothing, of the anus, breast, or any part of the genitals
of a child; or
(2) any touching of any part of the body of a child,
including touching through clothing, with the anus, breast, or any
part of the genitals of a person.
(d) An offense under Subsection (a)(1) is a felony of the
second degree and an offense under Subsection (a)(2) is a felony of
the third degree.