Blaptica dubia, the Dubia roach, also known as the orange-spotted cockroach, Guyana spotted cockroach, or Argentinian wood cockroach, is a medium-sized species of cockroach which grows to around 4.0–4.5 cm (1.6–1.8 in). They are sexually dimorphic; adult males have full wings covering their body, while females have only tiny wing stubs, their tegmina (forewings) being around a fourth of their body length. Blaptica dubia are ovoviviparous, giving birth to live young, and can give birth to 20 to 40 nymphs per month under favorable conditions.