Holotype: MLP, ♂. Original labels: a) “Sgo del ESTERO / RIO SALADO / Wagner Col.” b) “Parochodaeus / perplexus /Paulsen & Ocampo / HOLOTYPE” on red paper.
Type locality: Argentina: Santiago del Estero: Río Salado.
Etymology: "The specific epithet ‘perplexus’ is Latin meaning “muddled, interwoven”, because this species displays a mix of characters present in other species. The name also aptly represents how perplexed we were to find yet another new species from central Argentina. It is used a masculine adjective in the nominative singular."