Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
paenŭlārĭus, ii, m. [paenula], a maker of mantles or mantillas, pœnula-maker: consequitur paenularium, Novat. ap. Non. 148, 33 (acc. to Non., paenularium is a neutr., having the sense of theca et vagina paenula, a receptacle in which the pœnula is kept): CN. COSSVTIVS PAENVLARIVS, Inscr. Grut. 646, 5.