Kraemericus Schultz [L. P.] in Schultz et al. 1966:8 Masc. Kraemericus chapmani Schultz 1966. Type by original designation (also monotypic). •Valid as Kraemericus Schultz 1966 -- (Birdsong et al. 1988:183 [ref. 7303]). •Synonym of Xenisthmus Snyder 1908 -- (Gill & Hoese 2004:241 [ref. 27774], Gill et al. 2014:492 [ref. 33138], Parenti 2021:57 [ref. 38603]). Current status: Synonym of Xenisthmus Snyder 1908. Xenisthmidae.