Mucropetraliella capricornensis is found from Vanuatu.
Original description: Petralia capricornensis Tilbrook, Hayward & Gordon, 2001.
Locality: Vanuatu.
Holotype: BMNH 1998.8.4.244; Paratype: BMNH 1997.10.6.64.
Description from Tilbrook, Hayward & Gordon, 2001. (PDF file)