i'll admit its far from conclusive, i have revisited the earlier pics, in all pics of post #1 imo, the animal looks male to me, but, in pic#2 of post#2 where there is the best shot of the animal, it appears to have female traits, more slope to the occular region, preoccular horns pointing more skyward and a somewhat femalish looking casque.
the horns definitely prejudice the issue. since prior to this, i have never even seen a photograph of a female xanth with preoccular horns, its hard to know what to expect.
i will say this, ime, on typical female xanths with only a short rostoral horn, the horn tends to be more vertically pointed, almost like a rhinoceros rather than forward pointed like that of a male xanth.
i think the most conclusive way to tell would be to do a side x side with a xanth of similar age/size and known sex.
in the meantime it would be interesting to hear from others with xanth exp, particularly if there are any others that have had experience with female xanths that have had preoccular horns.
note the fairly upward orientation of the rostoral horn, and the more slanted, gentler transition of the occular region, plus a slightly more defined casque, as compared to the male.
since this cham was gravid but not displaying gravid colors, it sort of makes doing a comparison of body shapes irrelevant/non viable since presumably the op's cham is not gravid. if it was, then i guess that would make this thread a mute point.
she couldnt wait for the photo session to be over, so she could get on that rhodie, and catch me snoozin, so she could do the houdini, and warp into cham hyperspeed. she was already contemplating possible escape routes. so typical of a female, all they ever want to do, is just take the kids and go. lol
however, little justin, the male pictured below center, was always content to just hang out and chill, he just wanted to be one of the boys. lol. just for the record both pics taken over 18mths ago
this picture property of cf member coldbloodedal, borrowed your pic for purposes of sidexside comparison, will gladly delete if an issue.
im sort of on the fence, you guys had me thinkin female for a while, but now that i see them sidexside, im stickin with male. ive never had any experience with j jacksonii, but male or female, i dont think there is any question that its a xanth (nice try though). still awaiting opinions from experienced xanth keepers on the m/f issue. maybe, its a chamvestite lol