Panamapisa guaymii, Alves & Lowry & Neves & Johnsson, 2021

Alves, Jessika, Lowry, James K., Neves, Elizabeth G. & Johnsson, Rodrigo, 2021, A new genus and species, Panamapisa guaymii gen. nov. sp. nov., the first record of the family Eriopisidae Lowry & Myers, 2013 from Central America, Zootaxa 4927 (2), pp. 273-281 : 275-280

Panamapisa guaymii sp. nov.

( Figs 1–5 )

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Types. Holotype. Male , 11 mm, UFBA 3645 , Bay ofAmirante, Bocas del Toro, Panama (9°20’03.6”N 82°14’51.5”W), June 6 th 2017, 1m depth, in burrow, suction pump P.P.G. Pachelle coll. Allotype. Female , 10 mm, UFBA 3646 Bay of Amirante, Bocas del Toro, Panama (9°20’03.6”N 82°14’51.5”W), June 6 th 2017, 1m depth, in burrow, suction pump P.P.G. Pachelle coll. Paratypes. 2 males, 10 mm UFBA 3647 , Bay of Amirante , Bocas del Toro, Panama (9°20’03.6”N 82°14’51.5”W), June 6 th 2017, 1m depth, in burrow, suction pump P.P.G. Pachelle coll. 1 female, 9 mm UFBA 3648 , Bay of Amirante , Bocas del Toro, Panama (9°20’03.6”N 82°14’51.5”W), June 6 th 2017, 1m depth, in burrow, suction pump P.P.G. Pachelle coll.

Type locality. Bay of Almirante , Bocas del Toro, Panama (9°20’03.6”N 82°14’51.5”W) .

Habitat. Marine, in burrow, 1m depth.

Etymology. The species name “guaymii” refers to Guaymi, a native tribe typical of Panama, where the new species was collected.

Description. Slender and subcylindrical body, without any dorsal setae or spines, white colour in life ( Fig. 1 ). Eyes absent. Head lateral cephalic lobes rounded, anteroventral corner excavated ( Fig. 2 ). Antenna 1 about 3 × as long as antenna 2, article 1 as long as article 2, ventral margin with 3 small setae; accessory flagellum absent; primary flagellum 18-articulate, twice as long as long as peduncle ( Fig. 3 ). Antenna 2 scarcely setose; article 1 bulbous; cone gland smaller than mid-length of article 3; article 4 slightly longer than article 5; flagellum shorter than peduncle, 7-articulate ( Fig. 3 ).

Mouthparts. Labrum without seta, lateral margins expanded ( Fig. 3 ). Mandible palp 3-articulate, article 1 subrectangular, article 2 about 1/3 × longer than article 3, with 2 lateral setae, article 3 conical, without apical setae, lateral margin with 7 long setae; left mandibular incisor with 3 teeth, right with 4 teeth; lacinia mobilis symmetrical (3 cusps) and well developed, accessory row with 7 simple setae, molar small and triturating ( Fig. 3 ). Labium 2 × wider than long, outer lobes laterally expanded, with apical small, simple setae; inner lobes rounded, without setae ( Fig. 3 ). Maxilla 1, palp 2-articulate, article 1 subquadrate, as long as wide, article 2 more than twice as long as article 1, apical margin rounded with 3 long and 3 small apical setae; outer plate subrectangular, apical margin with 9 pectinate setae; inner lobe subquadrate, apical margin with 3 long and 1 short setae ( Fig. 3 ). Maxilla 2, slender, outer lobe as long as inner lobe, both apically setose; oblique row of setae absent. Maxilliped, outer plate subrectangular, with stout apical setae; inner plate thin, inner margin straight with six sets of setae, outer margin rounded, apical margin with four long setae; palp strong, well developed and 5-articulate; article 3 conical, inner margin beset with simple setae; article 4 notably globose, about 2/3 of article 3 length, 3 × as wide as article 5.

Pereon. Gnathopod 1, coxa 1 subrectangular, about twice as wide as long; basis subrectangular, without lobes, distal margin with 2 slender setae, posteroventral corner with one long seta; ischium less than half length of merus, distal margin with long seta; merus globose, subround, about 2.5 × as wide as ischium, distal margin beset with small setae, including two long stout setae; carpus long, about 0.3 × longer than propodus, distal margin densely setose; propodus globose, posterodistal margin excavate, covered with long, slender setae; palm oblique, concave, beset with small setae, fascial margin with row of stout setae; dactylus as long as palm, without seta or process ( Fig. 4 ).

Gnathopod 2 wider and longer than gnathopod 1, coxa 2 subrectangular, with coxal gill; basis robust, subrectangular, without lobes, posteroventral lobe with long seta; merus elongated, about twice longer than ischium; carpus subtriangular, smaller than propodus, distal margin with small setae; propodus globose and long, palm oblique defined by slender seta, ornamented with rounded process near hinge of dactylus, medial broad excavation and trapezoid process; dactylus robust, longer than palm, without setae or processes ( Fig. 4 ).

Pereopod 3 coxa subrectangular, with coxal gill; basis subrectangular, posterior margin with four setae, anterior margin with two setae; merus about half basis length, anterior margin with two setae, posteroventral corner with seta; carpus ¼ longer than merus, posterior margin setose; propodus elongated, similar in length to carpus; dactylus setose.

Pereopod 4 similar to pereopod 3, except by coxa 4 notch ( Fig. 4 ). Pereopod 5 coxa 5 anteriorly expanded, subrectangular; basis 2 × as long as wide, posterior margin smooth, posteroventral corner acute and projected; ischium subquadrate, anteroventral margin with one small seta; merus about 2/3 of basis length, posteroventral corner with one seta and anteroventral corner with two setae, one long and one small; carpus subrectangular, about 3/4 of merus length, posteroventral corner with 3 setae and anteroventral corner with 2 setae; propodus subrectangular, 1/3 longer than merus, anterior margin with 2 setae; dactylus setose ( Fig. 4 ).

Pereopod 6, 0.3 × longer than pereopod 5; gill present, coxa 6 similar to coxa 5; basis subrectangular, posterior margin slightly convex and smooth, posteroventral corner acute and produced; ischium subquadrate, anteroventral margin with one seta; merus long, subrectangular, about 4/5 of basis length, posteroventral and anteroventral corners with one seta; carpus elongated, subrectangular, slightly longer than merus, anterior margin with two medial setae, anteroventral and posteroventral corner with two setae; propodus about 1/3 as long as carpus, posteroventral corner with three setae; dactylus setose ( Fig. 5 ).

Pereopod 7 about 1.5 × as long as pereopod 6, coxal gill absent; coxa 7 subrectangular; basis elongated, posteroventral corner acute and produced; ischium subquadrate, merus about ¼ as long as basis, posterior margin with one seta, anteroventral and posteroventral corner with two small setae; carpus elongated, about ¼ longer than merus, anteroventral corner with three setae; propodus elongate, subrectangular, subequal in length to carpus, posteroventral corner with three small setae, anteroventral corner with one long seta; dactylus setose ( Fig. 5 ).

Urosome. Uropod 1 peduncle longer than rami, outer margin with 1 stout distolateral robust seta and 1 small distoventral setae; exopod about 0.5 × the peduncle length and 1/3 longer than endopod, tip subround with four small seta, endopod with two apical setae ( Fig. 5 ). Uropod 2 about 1/3 shorter than uropod 1, peduncle subrectangular, robust and shorter than rami; exopod subtriangular, about 2/5 longer than peduncle, outer margin with one seta; endopod subtriangular, ¼ shorter than outer, without setae ( Fig. 5 ). Uropod 3 about 3.5 × longer than uropod 1, peduncle similar in length to urosomite 1–3 combined; exopod about two × longer than peduncle, 2-articulate, article 2 tip with five setae; endopod vestigial and globose. Telson slightly cleft, as long as broad, with two distolateral stout setae ( Fig. 5 ).

Female (sexual dimorphic characteristics). Gnathopod 1 of female slightly smaller than males; similar in shape, except coxa 1 with a distal notch; carpus smaller and less setose; propodus distal margin less excavated and with three setae, fascial margin without rows of setae, propodus palm slightly angulated ( Fig. 6 ). Gnathopod 2 of females smaller than males, propodus distal margin with five sets of slender and small setae, fascial margin with a row of eight small setae, propodus palm smooth and acute, without any process or excavations ( Fig. 6 ).

Figures

FIGURE 1. Panamapisa guaymii sp. nov. Holotype, male, 11 mm, UFBA 3646. Bocas del Toro, Panama. Scale bar: 1 mm.

FIGURE 2. Panamapisa guaymii sp. nov. Holotype, male, 11 mm, UFBA 3646. Bocas del Toro, Panama. Scale bar: 1mm.

FIGURE 3. Panamapisa guaymii sp. nov. Holotype, male, 11 mm, UFBA 3646. Bocas del Toro, Panama. Scale bars: 1 mm (A1, A2); 0.5 mm (Mp, lMd, rMd, UL, LL, Mx1, Mx2).

FIGURE 4. Panamapisa guaymii sp. nov. Holotype, male, 11 mm, UFBA 3646. Bocas del Toro, Panama. Scale bars: 1 mm.

FIGURE 5. Panamapisa guaymii sp. nov. Holotype, male, 11 mm, UFBA 3646. Bocas del Toro, Panama. Scale bars: 1 mm.

FIGURE 6. Panamapisa guaymii sp. nov. Allotype, female, 10 mm, UFBA 3647. Bocas del Toro, Panama. Scale bars: 1 mm.