Fig 1.
South America map with Brazil highlighted.
(A) Northeastern Brazil with location of the Araripe Basin (south of the Ceará State). (B) Shrimps that are found in Santana Group: 1. Araripenaeus timidus, 2. Paleomattea deliciosa, 3. Sume marcosi, 4. Kellnerius jamacaruensis, 5. Cretainermis pernambucensis, 6. Priorhyncha feitosai, 7. indeterminate Caridea, 8. Beurlenia araripensis, drawn by Olga A. Barros with base in the descriptions: [3,7,9–13].
Fig 2.
Lateral view of the specimen 2466/CRT (UFC).
(A) Detail of the chelae on the second pereiopods. The other P3-P5 pereiopods without chelae with elongate dactylus. Pleopods are visible and are multi-segmented. (B) Reconstitution, dotted lines represent appendages not preserved but with impressions on the matrix. Rs: Rostrum; A: Antenna; An: Antennule; S: Scaphocerite; Pl: Pleopods; P1-P5: Pereiopods; I-VI: Pleon; T: Telson; U: Uropods. Scale bar: 10 mm. Photo and drawing by Olga A. Barros.
Fig 3.
(A) Antennal and branchiostegal spines are visible. (B) Detail of the uropods and telson with posterior spines, exopod is slightly longer than the telson. Rs: Rostrum; A: Antenna; An: Antennule; S: Scaphocerite; T: Telson; S: Spines; Ps: Posterior spines; End: Endopodite; Exo: Exopodite; Di: Diaresi; Pt: Protopodite. Scale bar: 10 mm. Photo: Olga A. Barros.
Fig 4.
(A) Detail of the uropod. Exopodite with diaresis has crossed by a thin longitudinal carina running parallel to the outside lateral margin and ending with a small spine in highlighted. The endopodite without ornamentation. (B) Detail of the Pereiopods with spine.
Fig 5.
Lateral view of the specimen 1673/LPU.
(A) Detail of the second pereiopod is represented by chelipeds. (B) Reconstitution, dotted lines represent appendages not preserved but with impressions on the matrix. Rs: Rostrum; An: Antennule; A: Antenna; S: Scaphocerite; Mxp3: Third maxilliped; P1-P5: Pereiopods; Pl: Pleopods; End: Endopod; Exo: Exopod; I-VI: Pleon; T: Telson; U: Uropods. Scale bars: 10 mm. Photo and drawing by Olga A. Barros.
Fig 6.
(A) The rostrum exhibits 12 supra-rostral spines with serrate appearance, two sub-rostral spines clear visible; brush’s presence of hairs (bristles) and spines well evident in the third maxilliped. (B) Detail of the Pereiopods P3-P5 have one spine in the merus. E: Eyes; Rs: Rostrum; An: Antennule; A: Antenna; S: Scaphocerite; As: Antennal spines; Bs: Branchiostegal spines; Mxp3: Third maxilliped. Photo by Olga A. Barros.
Fig 7.
(A) Detail of the pereiopods spines (black circle) and tubercles (white circle). (B) Detail of tubercles in existing caridean, when the tubercle is broken stay one hole in place of the tubercles (hole in detail of two black circles on the side by side). This hole can be filled by sediment during fossilization. (C) white circle is the detail of the tubercles in the second pereiopod (P2).
Fig 8.
(A) Lateral view of the 2108/MPSC (URCA). (B) Reconstitution, dotted lines represent appendages not preserved but with impressions on the matrix. Rs: Rostrum; An: Antennule; A: Antenna; As: Antennal spines; Bs: Branchiostegal spines; S: Scaphocerite; Mxp3: Third maxilliped; P1-P5: Pereiopods; Pl: Pleopods; I-VI: Pleon; T: Telson; U: Uropods. Scale bars: 10 mm. Photo and drawing by Olga A. Barros.
Fig 9.
(A) Detail of the telson with one pair of spines. (B) Detail of the telson with the posterior spine (PS). (C) Detail of the uropod. Exopodite with diaresis has crossed by a thin longitudinal carina running parallel to the outside lateral margin and ending with a small spine in highlighted. (D) third pereiopod (P3) with an evident spine.
Fig 10.
Lateral view of the UFRJ 171/CR.
(A) second pereiopod are represented by cheliped. (B) Reconstitution, dotted lines represent appendages not preserved but with impressions on the matrix. Rs: Rostrum; An: Antennule; E: Eyes; A: Antenna; S: Scaphocerite; P1-P5: Pereiopods; Pl: Pleopods; I-VI: Pleon; T: Telson; U: Uropods. Scale bars: 10 mm. Photo and drawing by Olga A. Barros.
Fig 11.
A) The detail of the rostrum partially preserved show 9 supra-rostral spines with serrate appearance, and 2 sub-rostral spines clearly visible. B) Smooth pleon without spines, the pleura of the second somite is strongly rounded, overlapping the first and third. The fourth and fifth somites are with a strongly acute pleura, characteristic that typical of Beurlenia araripensis. Rs: Rostrum; An: Antennule; E: Eyes; A: Antenna; S: Scaphocerite; P2: Second pereopod; I-VI: Pleon; Pl: Pleopods; T: Telson; U: Uropods. Scale bar 5 mm. Photo: Olga A. Barros.
Fig 12.
Detail of the second pereiopods (P2) represented by chelipeds with several tubercles clearly in the merus and carpus. Photo by Olga A. Barros.
Fig 13.
(A) second pereiopod are represented by cheliped. B) Reconstitution, dotted lines represent appendages not preserved but with impressions on the matrix. Rs: Rostrum; A: Antenna; An: Antennule; S: Scaphocerite; I-VI: Pleon; P1-P5: Pereiopods; Pro: Propodus; Pl: Pleopods; T: Telson; U: Uropods. Scale bars: 5 mm. Photo and drawing by Olga A. Barros.
Fig 14.
A) Detail of the rostrum with exhibits 11 supra-rostral spines with serrate appearance, sub-rostral spines not discernible. Rs = rostrum, A = antenna, An = antennule, S = scaphocerite, P1, P2 = pereiopods. B) The pleura of the second somite is strongly rounded, overlapping the first and third. The fourth and fifth somites are with a strongly acute pleura, characteristic that typical of Beurlenia araripensis. Rs: Rostrum; A: Antenna; An: Antennule; S: Scaphocerite; P1, P2: Pereiopods; I-VI: Pleon; Pl: Pleopods; T: Telson. Scale bar: 10 mm. Photo by Olga A. Barros.
Fig 15.
Lateral view of the UFRJ 243/CR.
Rs: Rostrum; A: Antenna; An: Antennule; S: Scaphocerite; P1-P5: Pereiopods; Pro: Propodus. Photo by Olga A. Barros.
Fig 16.
A) Pereiopods 3–5 have several tubercles in the merus and carpus. B) Reconstitution, dotted lines represent appendages not preserved but with impressions on the matrix. Scale bars: 5 mm. Photo and drawing by Olga A. Barros.