In other species: cattle , horse , pig , sheep

Mendelian trait/disorder: unknown

Considered a defect: yes

Cross-species summary: "Perosomus elumbis (PE) is a lethal congenital defect characterized by absence of the caudal parts of the spine and spinal cord, i.e. lumbar, sacral and coccygeal spinal segments with associated musculoskeletal malformations of the hind quarters." (Agerholm et al., 2014; see cattle entry)