Fig 1.
Stratigraphic profile and scheme of the Romualdo Formation.
Stratigraphic profile and scheme of the Romualdo Formation (Cretaceous—Aptian/Albian) where the specimens were collected. Vertical exposure = 32 m.
Fig 2.
Geographic position of Trindade, Pernambuco, Brazil.
Geographic position of the sampling site Trindade in the Araripe Basin, northeast Brazil. Colors indicate the different sequences of the Araripe Basin. Map figures (A) made with Natural Earth, and (B) was obtained from Brazilian Geological Service (CPRM, at https://geoportal.cprm.gov.br/geosgb/) powered by ESRI.
Fig 3.
Dubiostenopus parvus n. gen. n. sp.
Dubiostenopus parvus gen. nov. sp. nov. (MPSC 2542) from the Romualdo Formation, Cretaceous (Aptian/Albian), Araripe Basin: (a) lateral view of the holotype; (b) SEM image of the holotype, lateral view, detail of pereiopods; (c) detail of pleomeres 1–4; white arrows show the third pleura strong ventral spines; (d) detail of pleomere 1–3; dotted lines represent the right pleural margins; (e) detail of anterior region; dotted lines represent the eyes position; yellow arrows indicate the dorsal rostral spines; red arrow indicates the rostrum posterior margin; (f) line drawing of the holotype; dotted lines represent pl4 dorsal region not preserved and the right pleural margins. Scale bars: 2 mm. Specimen dry, uncoated. Photos: (a, b) A.P. Pinheiro; (c, e, f) D. Lima. Line drawing by D. Lima.