Pseudharpinia jonesyi, Andrade & Senna, 2020

Andrade, Luiz F. & Senna, André R., 2020, Four new species of Pseudharpinia Schellenberg, 1931 (Crustacea: Amphipoda Phoxocephalidae) from southwestern Atlantic and new records of P. tupinamba Senna & Souza-Filho, 2011, Zootaxa 4763 (4), pp. 501-537 : 509-517

Pseudharpinia jonesyi sp. nov.

( Figs 6–12 )

Type material. Holotype: female, 5.5 mm length, dissected and drawn, MBT 104, 26°34’S, 47°59’W, 58 m depth, Santa Catarina state, 20 June 1970, UERJ 444 . Paratype: male, dissected and drawn, same data as for the holotype, UERJ 445.

Additional material examined. 61 females, same data as for the holotype, UERJ 446; 20 females and 1 male, MBT 106, 26°45’S, 47°16’W, 130 m depth, Santa Catarina state, 20 June 1970, UERJ 447; 11 females, MBT 81, 24°46’S, 45°58’W, 72 m depth, São Paulo state, 26 June 1970, UERJ 448; 11 females, MBT 128, 29°23’S, 49°10’W, 54 m depth, Santa Catarina state, 25 June 1970, UERJ 449; 4 females, MBT 219, 23°03’S, 42°00’W, 100 m depth, Rio de Janeiro state, 6 June 1971, UERJ 450; 1 female and 1 male, MBT 188, 24°58’S, 45°26’W, 98 m depth, São Paulo state, 30 May 1971, UERJ 451; 1 female, MBT 218, 23°03’S, 42°19’W, 75 m depth, Rio de Janeiro state, 5 June 1971, UERJ 452; 1 female, MBT 137, 30°03’S, 50°04’W, 25 m depth, Rio Grande do Sul state, 26 June 1971, UERJ 453.

Diagnosis. Head with dorsal keel. Rostrum entire. Antenna 2 peduncle article 1 with a rounded ensiform process. Mandible molar with 3 multicuspidate stout setae. Maxilliped inner plate with 1 stout seta apically; outer plate with stout bipectinate setae; palp article 4 bearing elongated apical nail. Gnathopods 1–2 basis stout; carpus subtriangular; propodus weakly setose. Pereopod 6 basis strongly expanded posteriorly as an acute spine. Pereopod 7 basis expanded posteroventrally, reaching half of ischium. Epimeral plate 3 ventral margin concave, posteroventral corner produced into a large hook. Uropods 1–2 rami continuously setose to apex. Uropod 3 outer ramus continuously setose to apex. Telson short, apex rounded, with 3 setae apically on each lobe.

Description. Based on female holotype, UERJ 445.

Head. Antenna 1 peduncle article 1 stout, about 1.3 × longer than wide, ventral margin with brush setae distally, dorsal margin with 1 long pappose seta distally; article 2 ventral margin with 9 long pappose and 2 brush setae, dorsal margin with 2 setae distally; article 3 short, ventral margin with 3 long setae; primary flagellum 7-articulate; accessory flagellum 5-articulate. Antenna 2 peduncle article 2 subrectangular; article 3 ventral margin with 2 setae distally, dorsal margin with 1 seta; article 4 slightly longer than wide, ventral margin with long pappose and brush setae, facial margin with 1 brush seta medially and a row of 8 long setae extending to dorsal apex; article 5 about 0.7 × the length of article 4, ventral margin with long simple and pappose setae, dorsal margin with 2 setae subapically; flagellum 7-articulate. Upper lip and lower lip ordinary. Mandible incisor with 6 (left) – 5 (right) teeth, lacinia mobilis with 4 (left) – 2 (right) teeth, accessory setal row with 8 (left) – 11 (right) multicuspidate stout setae, palpar hump small; palp 3-articulate, article 1 short, article 2 weakly setose, with setae on medial margin only, article 3 slightly shorter than article 2, apex oblique, with setae extending from medial margin to apex. Maxilla 1 inner plate with 1 plumose seta apically; outer plate with 9 multicuspidate stout setae; palp article 2 medial and lateral margins with setules, apical and subapical margins with sparse setae. Maxilla 2 inner plate subequal to outer, medial margin with setules and a row with 8 plumose setae extending to apical margin; outer plate setose apically, lateral margin with 2 setae distally. Maxilliped inner plate with 5 plumose setae; outer plate medial margin with 7 bipectinate stout setae progressively increasing in length to apex, lateral margin with 1 simple and 2 plumose setae; palp article 2 medial margin moderately setose, article 3 margins with medium to long setae, article 4 about 3.2 × longer than wide, with 2 accessory setae.

Pereon. Gnathopod 1 coxa expanded anteroventrally, ventral margin with 13 pappose setae; basis about 1.8 × longer than wide, posterodistal corner with 3 setae; ischium short and subrectangular, posterior margin with 1 pappose and 1 simple setae; merus posterior margin with 7 pappose setae; carpus anterior margin with 1 long seta distally, posterior margin with 4 pappose and 4 simple setae; propodus weakly setose, anterodistal margin with a tuft of setae, posterior margin with 1 stout seta defining palm; palm covered with setules on its margin, palmar hump large; dactylus subequal to palm, outer margin with 1 short seta distally. Gnathopod 2 coxa subrectangular, anterior margin slightly convex, posterior margin almost straight, ventral margin with 10 plumose setae; basis about 2.4 × longer than wide, posterior margin with 2 pappose setae, posterodistal corner with 3 pappose setae; ischium short and subrectangular, posterior margin with 2 pappose setae; merus posterior margin with 9 pappose setae; carpus anterior margin with 1 pappose seta distally, posterior margin with 2 pappose setae; propodus weakly setose, anterodistal margin with a tuft setae, posterior margin with 1 stout seta defining palm; palm covered with setules on its margin, palmar hump large; dactylus slightly longer than palm. Pereopod 3 coxa subrectangular, ventral margin with 11 plumose setae; basis about 2.4 × longer than wide, posterior margin with 1 pappose seta, posterodistal corner with a row of 5 pappose setae; ischium short and subrectangular, posterodistal corner with a row of 5 pappose setae; merus stout, anterior margin produced distally, with 5 pappose setae distally, posterior margin moderately setose with pappose setae, facial margin with a row of 6 setae distally; carpus anterior margin with 1 short seta distally, posterior margin with long pappose setae and stout setae progressively more robust and longer, facial margin with row of 6 setae; propodus anterior margin with 2 setae distally, posterior margin with 7 setae; dactylus about 85% the length of propodus. Pereopod 4 coxa posterior margin strongly expanded, posterodorsal margin excavate, ventral margin with 10 plumose setae; remaining articles are very similar to pereopod 3, differing only by a narrower merus and some arrangements of setae. Pereopod 5 coxa bilobate, posteroventral lobe produced, with 6 pappose setae; basis about 3.9 × longer than wide, anterior margin with 4 plumose setae, anterodistal corner with a row of 4 plumose setae; ischium short and subrectangular, anterodistal corner with a row of 4 plumose setae; merus margins moderately setose, facial margin with simple setae distally; carpus anterior and posterior margins strongly setose, facial margin with row of setae distally; propodus margins strongly setose; dactylus about 65% the length of propodus. Pereopod 6 coxa small, posterior margin with 1 short seta; basis strongly expanded posteriorly as an acute spine proximally, anterior margin with plumose setae, posterior margin with 2 plumose setae proximally and covered with setules; ischium short and subrectangular, anterior margin with 5 setae; merus anterior margin with 10 stout setae, posterior margin with 4 plumose setae proximally and 2 stout distally; carpus anterior margin with stout and simple setae, distofacial lobe produced; propodus anterior margin covered with long setae; dactylus about 65% the length of propodus. Pereopod 7 coxa rounded; basis slightly longer than wide, posteroventral margin expanded, reaching half of ischium, anterodistal angle with a row of 5 setae, posterior margin serrated, with 2 plumose setae distally; ischium distofacial lobe produced, anterior margin with 2 setae, anterodistal angle with a row of 3 setae; merus anterior margin with 5 setae, posterior margin produced distally; carpus anterior margin with 3 setae, posterior margin with 2 setae distally; propodus anterior margin with 2 setae, posterior margin with 1 seta distally; dactylus about 90% the length of propodus.

Pleon. Epimeral plate 1 anterior margin concave, anteroventral corner with 1 seta. Epimeral plate 2 anterior margin concave, anteroventral corner produced, ventral margin with 4 setae. Epimeral plate 3 anterior margin concave, ventral margin with 2 setae, posterior margin with 3 short setae, posteroventral corner strongly produced dorsally into an acute hook. Uropod 1 peduncle 4 × longer than wide, dorsomedial margin with 9 setae, dorsolateral margin with 4 setae; outer ramus slightly longer than inner, dorsomedial and dorsolateral margins with 6 and 8 setae respectively; inner ramus dorsomedial margin with 7 setae. Uropod 2 peduncle 2.3 × longer than wide, dorsomedial margin with 4 setae, dorsolateral margin with 5 setae; outer ramus slightly longer than inner, dorsomedial and dorsolateral margins with 8 and 7 setae respectively; inner ramus dorsomedial margin with 9 setae. Uropod 3 peduncle slightly longer than wide, dorsoapical margin with a row of 7 stout setae; outer ramus slightly longer than inner, article 1 dorsomedial margin with 10 long setae continuously to apex, article 2 about 1.7 × longer than wide, with 2 long setae apically; inner ramus dorsomedial margin with 1 long seta subapically and 2 setae apically, dorsolateral margin with 4 setae. Telson about 75% cleft, lobes rounded with 3 setae each.

Sexual dimorphism. Based on male paratype, UERJ 445.

Body smaller in size.

Head. Antenna 1 peduncle article 1 stout, about 1.1 × longer than wide, ventral margin with brush setae and long setules distally, dorsal margin with a row of setules and 1 long plumose setae distally; article 2 ventral margin with long setae and 1 brush seta distally, dorsal margin with 1 seta distally; article 3 ventral margin with 2 setae; primary flagellum 8-articulate; accessory flagellum 5-articulate. Antenna 2 peduncle article 3 ventral margin with 6 setae, dorsal margin covered with setules; article 4 ventral margin with long pappose setae and 5 brush setae, facial margin with 1 brush setae and a row of 10 long setae extending to dorsal apex; article 5 slightly longer than article 4, ventral margin weakly setose, dorsal margin with 6 tufts of setules and 3 calceoli; flagellum 36-articulate, with setules and 14 calceoli.

Pereon. Gnathopods 1–2, similar to female, but more robust; propodus stouter; palms longer and more acute. Pereopod 6, basis, strongly expanded posteriorly as an acute, but shorter spine.

Pleon. Uropod 3 peduncle 1.6 × longer than wide, dorsoapical margin with a row of 9 stout setae; outer ramus subequal to inner, article 1 margins covered with long plumose setae, article 2 about 1.6 × longer than wide, with 1 long plumose seta on each margin and 2 long setae apically; inner ramus margins covered with long plumose setae, with 2 long plumose setae apically.

Etymology. Named after John Paul Jones, artistic name of John Richard Baldwin also known as Jonesy, bassist/keyboardist of the band Led Zeppelin, as a homage to his brilliance and contributions to music as a multi-instrumentalist.

Type locality. Santa Catarina state coast (26°34’S, 47°59’W).

Remarks. This species presents a very remarkable character, so far considered unique for Pseudharpinia . The presence of an acute spine projected posteriorly on the basis of pereopod 6 is an exclusive character that makes Pseudharpinia jonesyi sp. nov. easily distinguishable not only within the genus, but in Harpiniinae as well.

Geographic distribution. The species is known from the coast of the Brazilian states of Rio de Janeiro, São Paulo, Santa Catarina and Rio Grande do Sul ( Fig 24 ).

Bathymetric range. 25–130 m depth.

Figures

FIGURE 6. Pseudharpinia jonesyi sp. nov. Holotype, female, UERJ 444, Santa Catarina state coast (26°34’S, 47°59’W), Brazil; paratype, male, UERJ 445, same data as for the holotype. Scale bars: 1.0 mm.

FIGURE 7. Pseudharpinia jonesyi sp. nov. Holotype, female, UERJ 444, Santa Catarina state coast (26°34’S, 47°59’W), Brazil; paratype, male, UERJ 445, same data as for the holotype. Scale bars: 0.5 mm for fHd; 0.2 mm for the remainings.

FIGURE 8. Pseudharpinia jonesyi sp. nov. Holotype, female, UERJ 444, Santa Catarina state coast (26°34’S, 47°59’W), Brazil. Scale bars: 0.2 mm for L,Md and R,Md; 0.1 mm for the remainings.

FIGURE 9. Pseudharpinia jonesyi sp. nov. Holotype, female, UERJ 444, Santa Catarina state coast (26°34’S, 47°59’W), Brazil; paratype, male, UERJ 445, same data as for the holotype. Scale bars: 0.2 mm.

FIGURE 10. Pseudharpinia jonesyi sp. nov. Holotype, female, UERJ 444, Santa Catarina state coast (26°34’S, 47°59’W), Brazil. Scale bars: 0.2 mm.

FIGURE 11. Pseudharpinia jonesyi sp. nov. Holotype, female, UERJ 444, Santa Catarina state coast (26°34’S, 47°59’W), Brazil; paratype, male, UERJ 445, same data as for the holotype. Scale bars: 0.5 mm.

FIGURE 12. Pseudharpinia jonesyi sp. nov. Holotype, female, UERJ 444, Santa Catarina state coast (26°34’S, 47°59’W), Brazil; paratype, male, UERJ 445, same data as for the holotype. Scale bars: 0.5 mm for Ep1–3; 0.1 mm for fU3 and T; 0.2 mm for the remainings.

FIGURE 24. Distribution of P. bonhami sp. nov., P. jonesyi sp. nov., P. pagei sp. nov. and P. planti sp. nov. Diamond: records for P. bonhami sp. nov. and P. jonesyi sp. nov.; Star: records for P. jonesyi sp. nov.; Triangle: record for P. pagei sp. nov.; Circle: record for P. planti sp. nov. and P. jonesyi sp. nov.