Panamapisa guaymii Alves & Lowry & Neves & Johnsson 2021, sp. nov.
Creators: name: Alves, Jessika
name: Lowry, James K.
name: Neves, Elizabeth G.
name: Johnsson, Rodrigo
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Eriopisidae
Panamapisa
Panamapisa guaymii

description: Panamapisa guaymii sp. nov.
(Figs 1–5)
urn:lsid:zoobank.org:act: 7DA73DF9-5A72-4A3E-9B72-12553B729D29
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).
description: Published as part of 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, pp. 273-281 in Zootaxa 4927 (2) on pages 275-280, DOI: 10.11646/zootaxa.4927.2.7, http://zenodo.org/record/4537113