missex

mis- +‎ sex

missex (third-person singular simple present missexes, present participle missexing, simple past and past participle missexed)

1. To sex incorrectly; to incorrectly determine the sex of.
   • 1978, National Cancer Institute carcinogenesis technical report series. v. 18, 1978:

     The low-dose group consisted of 34 males and 36 females instead of 35 animals of each sex , because of missexing during the initiation of the study.

   • 1986, Zoologische Verhandelingen:

     The three specimens from Bangka on which the name minor was based, supposedly two males and a female, had wing-lengths of 66, 67 and 68 mm; one may suspect missexing.

   • 1996, Natal Museum (Pietermaritzburg, South Africa), Annals of the Natal Museum:

     As it is unlikely that Janssens missexed the type I must assume that the specimens were mislabelled. Although I am unwilling to exchange the labels, I accept the studied by me to be the holotype, and accordingly have attached a suitable [indicator].

   • 1996, G. F. Mees, Nuttall Ornithological Club, Publications of the Nuttall Ornithological Club:

     In the subspecies intermedia and baliensis a similar sexual difference may be assumed, but cannot be established because of insufficient material . In species lacking sexual dimorphism in plumage, some missexing is also to be expected.

   • 2012, John Rossi, Roxanne Rossi, What's Wrong With My Snake, Fox Chapel Publishing, →ISBN, page 100:

     Missexing is a very common reason for the failure of two snakes to mate. Double-check the sex of both snakes prior to breeding season. If you are not sure, have them sexed by an experienced herpetoculturist or veterinarian.

• misgender

• sexism