Hernáez, Patricio; Miranda, Marcel S.; Rio, Juliana P. P.; Pinheiro, Marcelo A. A.
Callichirus corruptus Hernáez & Miranda & Rio & Pinheiro 2022, sp. nov.
A new Callichirus ghost shrimp species from the southwestern Atlantic, long confounded with C. major (Say, 1818) (Decapoda: Axiidea: Callichiridae)
Hernáez & Miranda & Rio & Pinheiro, 2022
Figure 1. a, male and female specimen of Callichirus corruptus sp. nov. from the Brazilian coast (MZUSP 39027); b, collection sites (empty circles) for Callichirus corruptus sp. nov. along the Brazilian coast. Scale bar: A = 1 cm.
Figure 2. Callichirus corruptus sp. nov. a–d, holotype, male (cl: 18.8 mm), MZUSP 41251; e, paratype, male (cl: 18.6 mm), MZUSP 41253. a, body, lateral view; b, carapace and cephalic appendages, lateral view (arrows indicate branchiostegal lobe and emargination on central part of carapace); c, anterior part of carapace and cephalic appendages,dorsal view; d, basal part of antennal peduncle, dorsal view (setae omitted; arrow indicates scaphocerite); e, right third maxilliped, external surface. Scale bars: a = 1 cm; b, c = 2 mm; d = 1 mm; e = 4 mm.
Figure 3. Callichirus corruptus sp. nov. a, c, holotype, male (cl: 18.8 mm), MZUSP 41251; b, d, paratype, female (cl: 20.4 mm), MZUSP 41252. a, c, male major and minor chelipeds, respectively, lateral view; b, d, female major and minor chelipeds, respectively, lateral view. Scale bars: 1 cm.
Figure 4. Callichirus corruptus sp. nov.; holotype, male (cl: 18.8 mm), MZUSP 41251. a–d, second, third, fourth and fifth pereopods, respectively, lateral view. Scale bars: 2 mm.
Figure 5. Callichirus corruptus sp. nov. a, b, d, f, holotype, male (cl: 18.8 mm), MZUSP 41251; c, e, paratype, female (cl: 20.4 mm), MZUSP 41252. a, sixth pleomere, uropods and telson, dorsal view; b, c, male and female first pleopods, respectively, external surface; d, e, male and female second pleopods, respectively, external surface; f, third to fifth pleopods, external surface. Scale bars: a, c, e, f = 2 mm; b, d = 1 mm.
Figure 8. Carapace and cephalic appendages, dorsal view. a, Callichirus corruptus sp. nov., MZUSP 41251; b, Callichirus garthi, MUAP-CD 0426/2011; c, Callichirus islagrande (courtesy of Nuno Simões); d, Callichirus major, USNM 228086; e, Callichirus santarosaensis (modified from Sakai and Türkay 2012); f, Callichirus seilacheri, MZUCR 3335–01. Scale bars: 10 mm.
Figure 9. Male pleopod 2 and third maxilliped, external surface. a, Callichirus adamas (modified from Kensley 1974); b, Callichirus corruptus sp. nov., MZUSP 41251; c, Callichirus islagrande, USNM 69362; d, Callichirus major, USNM 228086; e, Callichirus santarosaensis (modified from Sakai and Türkay 2012); f, Callichirus adamas (modified from Kensley 1974); g, Callichirus garthi, MZUC-UCCC 7311; h, Callichirus seilacheri, MZUCR 3335–01. Scale bars: a–d = 1 mm; e–h = 5 mm.
Figure 10. a, Callichirus aff. major Colombia, male major cheliped dactylus and fixed finger, lateral view, USNM 266225; b, Callichirus corruptus sp. nov., male major cheliped dactylus and fixed finger, lateral view, MZUSP 41251; c, Callichirus corruptus sp. nov., female major cheliped merus, lateral view, MZUSP 41252; d, Callichirus garthi, male major cheliped ischium, lateral view, MUAP-CD 0432–2011; e, Callichirus garthi, sixth pleomere, uropods and telson, dorsal view, MUAP-CD 0432–2011; f, Callichirus islagrande, male major cheliped merus and ischium (courtesy of Nuno Simões), lateral view; g, Callichirus adamas, male major cheliped merus and ischium (modified from Kensley 1974), lateral view; h, Callichirus islagrande, sixth pleomere, uropods and telson, dorsal view, USNM 69362. Scale bars: 10 mm.