Andeepia ingridae, Coleman, Tapati Biswas Charles Oliver & Hendrycks, Ed A., 2009

Coleman, Tapati Biswas Charles Oliver & Hendrycks, Ed A., 2009, Andeepia ingridae a new genus and species of Pardaliscidae (Crustacea, Amphipoda) from the Antarctic deep-sea and short redescription of Nicippe unidentata K. H. Barnard, 1932, Zootaxa 1977, pp. 21-38 : 25-34

publication ID	https://doi.org/ 10.5281/zenodo.185176
DOI	https://doi.org/10.5281/zenodo.5667615
persistent identifier	https://treatment.plazi.org/id/7D3A87B5-FFFA-496A-FF17-F73AFB5CFC52
treatment provided by	Plazi
scientific name	Andeepia ingridae
status	sp. nov.

Treatment

Andeepia ingridae View in CoL sp. n.

( Figures 1 View FIGURE 1 a – c, e –7)

Type material. Four specimens. Holotype: Female with non-setose oostegites, 12.5 mm (catalogue number ZIM K- 41506). Locus typicus: RV Polarstern: ANT XXII/3 EBS 121-11-E: 63° 38.27S –63° 37.31S; 50° 37.16W –50° 38.04W; 14 March 2005; 2659 m; leg. (collector) Angelika Brandt.

1 paratype (a), female with non-setose oostegites, 14 mm (catalogue number ZIM K- 51507); 1 paratype (c), juvenile 5.9 mm (catalogue number ZIM K- 41509) both from type locality.

1 paratype (b), female with non-setose oostegites, 15.2 mm (catalogue number CMNC 2008-0109): RV Polarstern: ANT XXII/3 EBS 80-9-S: 70° 38.45S –70° 39.18S; 14° 42.86W –14° 43.43W; 23 February 2005; 3100 m; leg. Angelika Brandt.

Etymology. This species is named for Ingrid Biswas, the mother of the senior author.

Description of holotype. Body ( Fig. 1a View FIGURE 1 a – c, e ) slender, appearing elongate. Head without eyes, longer than wide. Rostrum short and broad, distally pointed. Lateral cephalic lobe broadly triangular, rounded. Ventral margin of head shallowly concave. Pereonite 1 slightly shorter than head. Pereonites 1–4 subequal in length. Pereonites 5–7 subequal but longer than 1–4. Pleonites 1–3 elongated, longer than preceding tergites and successively longer; epimeron 1–3 posteroventral corners rounded. Urosomite 1 longest; urosomite 2 with a distinct tooth projecting over posterior margin; urosomite 3 longer than 2.

Antenna 1 ( Fig. 1c View FIGURE 1 a – c, e ) longer than 2. Antenna 1 peduncular article 1 about 2 x as wide as articles 2–3, distolaterally strongly angled at insertion of article 2; article 2 0.5 x the length of article 1; length of article 3 0.60 x the length of article 2; accessory flagellum 4–articulate; primary flagellum 33-articulate, not strongly setose. Antenna 2 ( Fig. 1b View FIGURE 1 a – c, e ) peduncular article 1 ovoid, article 2 with rounded blunt gland cone; article 3 wider than 4–5, distolaterally strongly angled at insertion of article 4, relative lengths of articles 3–5 = 1: 1.27: 1; flagellum 16-articulate, not setose. Labrum and lower lip damaged in holotype (see paratype a, b below).

Mouthparts not cone-like, shallow in lateral view ( Fig. 1a View FIGURE 1 a – c, e and in paratype 6b). Left mandible ( Fig. 1 View FIGURE 1 a – c, e e, compare details of paratype a and b in Figs. 2 View FIGURE 2 d – f b, and 7e, j,) incisor wide with some rounded teeth; left lacinia mobilis wide, multidentate; setal row consisting of 2 raker spines and fine setae; pars molaris not present; mandibular palp 3-articulate, length ratio of articles = 1: 2.5: 2.25; article 2 widest with 3 marginal setae; article 3 slender, with 2 marginal setae and 2 apical setae. Maxilla 1 ( Fig. 2e View FIGURE 2 d – f ) inner plate damaged; outer plate apically oblique with 8 spine-teeth; palp 2-articulate, article 1 long, length 0.77 x article 2, palp surpassing outer plate, article 2 expanded distally with distal spines and marginal setae. Maxilla 2 ( Fig. 2d View FIGURE 2 d – f ) both plates relatively wide, inner plate wider than outer plate, somewhat shorter, bordered with 9 setulated setae (only 7 shown) along the inner margin; outer plate with 3 terminal setae. Maxilliped ( Fig. 2f View FIGURE 2 d – f ) inner plates with 2 apical setae; outer plates shorter than distal margin of 1st palp article, with 4 stout setae on oblique apices; article 3 = 1.21 x length of palp article 1; palp rather long, 4-articulate, very slender, sparsely setose; article 4 falcate, relatively stout, inner margin not serrate, except for small subterminal notch with seta.

Coxae of all pereopods ( Fig. 1a View FIGURE 1 a – c, e ) slightly separate from each other or weakly overlapping, wider than long; coxae 1–4 subequal in length, posteroventral margin with a fine seta. Gnathopod 1 ( Figs. 3a, b View FIGURE 3 a – e ) coxa short, narrow, anteroventrally pointed; basis stout, curved, expanded distally; ischium short, subrectangular; merus and carpus subequal in length; carpus weakly lobate, ventrally with 5–6 setae, with 3–4 spines, about half the length of gnathopod 2 carpus; propodus very robust, anterior margin strongly convex with only few setae, palm occupying nearly complete straight ventral margin, bordered with setulated setae of varying lengths; dactylus very long and strongly curved, reaching nearly the complete length of the ventral margin of propodus, tip of dactylus moves to medial face of propodus when adducted; inner margin of dactylus smooth; however, under high magnification there are hints of 9 (?) teeth embedded in the cuticle ( Fig. 3b View FIGURE 3 a – e ).

Gnathopod 2 ( Figs. 3c, d View FIGURE 3 a – e ) of a different shape, propodus less robust, slightly shorter (0.87 x) and more slender compared to preceding appendage; coxa ovoid, bluntly rounded anteriorly and posteriorly; compared to gnathopod 1: basis longer, straighter; ischium longer than wide and tapering distally (vs wider than long and subrectangular); merus parallelogram-shaped (vs triangular); carpus large, longer than wide, somewhat lobate, strongly setose ventrally (vs trapezoid with fewer short setae); propodus less robust, shorter and tapering distally, palm shorter and convex, with shorter setae; dactylus shorter and not as strongly curved, tip of dactylus fits to medial pit on propodus when adducted; inner margin with 10 strongly pointed flattened teeth directed posteriorly towards the tip of the dactylus (vs smooth margin).

Pereopods 3–4 ( Figs. 3e View FIGURE 3 a – e , 4a View FIGURE 4 a – d ) alike (note - pereopod 4 slightly longer than 3 and pereopod 4 carpus less setose); coxa subrectangular, posteroventral margin with a fine seta; basis long and slightly expanded distally; ischium longer than wide; merus anterior margin expanded into a subacute apex, posterior margin straight, length much shorter than carpus (0.55–0.58 x); carpus and propodus subequal in length, propodus narrower, both articles with posteromarginal setation; dactylus long and slender not strongly curved. Pereopods 5–7 ( Figs. 4b–d View FIGURE 4 a – d ) merus to propodus successively longer on each pereopod; coxae of pereopods 5–6 much wider than long, that of pereopod 7 slightly indented with narrowly rounded posterior lobe; basis of 5–7 slender, rectangular without posteroventral lobes; merus to propodus 5–7 slender with few and short setae; dactyli all long and slender, slightly curved.

Gills ( Fig. 1a View FIGURE 1 a – c, e ) cylindrical and short, length much less than basis, found on pereopods 2–6. Oostegites present on pereopods 2–5, not fully developed (lacking setae), somewhat narrowing distally. Pleopods strong, both peduncles and rami long with many long, plumose setae.

Spination of uropods weak. Uropod 1 ( Fig. 5a View FIGURE 5 a – d ) lanceolate, peduncle long, 1.4 x rami, subrectangular, margins with short spines, with a distomedial broad tooth; rami subequal in length with few short spines, apical third of both rami lacking setae. Uropod 2 ( Fig. 5b View FIGURE 5 a – d ) lanceolate, peduncle length 0.79 x length of uropod 1 peduncle, with a short distomedial tooth; rami subequal in length, apical third of both rami lacking setae. Uropod 3 ( Fig. 5c View FIGURE 5 a – d ) short, with stout peduncle, length 0.64 x outer ramus, equipped with distoventral short flange, and relatively short subequal flattened rami (insertion points of few setae present, setae missing, but most likely long plumose), outer ramus with small distal segment with 2 terminal setae (see detail of Fig. 5c View FIGURE 5 a – d ). Fringes of microtrichs on the margins of peduncle and rami of all uropods. Telson ( Fig. 5d View FIGURE 5 a – d ) relatively short (length 1.6 x width), cleft (68%) with narrowly rounded unnotched apices.

Details from paratype a. Epistome ( Fig. 2 View FIGURE 2 d – f a), triangular, without keel. Labrum ( Fig. 1 View FIGURE 1 a – c, e d) wider than long, with shallow incision, slightly asymmetrical; both apical lobes short and wide, of about equal length. Mandible ( Figs. 2 View FIGURE 2 d – f b, c) incisors wide and irregularly toothed; left lacinia mobilis ( Fig. 2 View FIGURE 2 d – f b) wide, 4-dentate; spine row on right mandible ( Fig. 2 View FIGURE 2 d – f c) with only 1 raker spine. Lower lip with wide hypopharyngeal gap; lobes of lower lip blunt (damaged?). Maxilla 1 inner plate short, triangular, with 1 long terminal seta. Maxilla 2, inner margin of inner plate with 10 setae.

Details from paratype b. Mandible (Figs. 7d, e, h, j, k) incisors very slightly asymmetric, margins wide with 4 irregular teeth, anteroventral corners with a large pointed tooth; left mandible (Figs. 7e, j) lacinia mobilis very wide, triangular, irregularly 7–8 dentate; spine row with 2 curved raker spines and proximal tuft of setae; palp article 3 with 2 marginal setae and 3 apical setae; right mandible (Figs. 7d, h, k) with apparent lacinia as a cluster of 2 broad spines; spine row with 1 raker spine and proximal tuft of straight setae, palp article 2 with 4 marginal setae. Lower lip (Fig 7c), outer lobes rounded. Maxilla 1 (Figs. 7l, m) palp article 1, FIGURE 7a–m. Andeepia ingridae sp. n. paratype b, female with non-setose oostegites, 15.2 mm (CMNC 2008-0109). a) labrum; b) apex of outer plate of maxilliped; c) lower lip; d) lateral view of right mandible, incisor and lacinia; e) left mandible, incisor and lacinia mobilis; f) right side of maxilliped; g) rostrum; h) right mandible, incisor and lacinia (?); i) maxilla 2; j) left mandible; k) right mandible, 3rd article of palp not shown; l, m) maxilla 1 (l is missing inner plate).

length 0.56 x article 2. Maxilla 2 (Fig. 7i) inner plate narrowing distally and truncate, with 3 distal setae and 7–8 inner marginal setae. Maxilliped (Figs. 7b, f) outer plate just reaching distal inner margin of 1st palp article, with 3 stout setae and 1 long inner marginal seta on oblique apices; article 3 = 1.44 x length of palp article 1.

Antenna 1 ( Figs. 6a, c View FIGURE 6 a – g ) peduncular article 2 0.57 x length of article 1; length of article 3 0.56 x length of article 2; accessory flagellum 5-articulate; primary flagellum 25-articulate. Ventral margin of head ( Figs. 6a, b View FIGURE 6 a – g ) at antenna 2 insertion shallowly concave. Antenna 2 ( Fig. 6b View FIGURE 6 a – g ) article 2 with narrowly rounded gland cone; relative lengths of peduncular articles 3–5 = 1: 1.27: 1.05; flagellum 19-articulate. Gnathopod 1 carpal lobe ventrally with 4 short spines and 1 large spine. Oostegites ( Fig. 6g View FIGURE 6 a – g ) lacking setae, not fully developed, fairly narrow, tapering distally. Urosomite 2 ( Fig. 6d View FIGURE 6 a – g ) dorsal tooth with a very fine seta underneath it. Uropod 3 ( Fig. 5 View FIGURE 5 a – d h) peduncle with distoventral flange, flange margin microserrate. Telson ( Fig. 5 View FIGURE 5 a – d g) length 1.68 x width, cleft 64%.

Remarks. The new taxon superficially resembles species from the genus Nicippe , such as N. tumida and N. unidentata but due to many remarkable differences (see table 1), the new genus Andeepia was introduced to accept it.

The other two genera in the taxonomic complex, Spelaeonicippe and Antronicippe differ from the new species to a greater extent. Spelaeonicippe provo Stock & Vermeulen, 1982 has an elongate antenna 2 (vs shorter in the new taxon); pereopods 6–7 with strong posteroventral lobes of basis (vs lacking lobes) and the rami of uropods 1–2 are of unequal length (vs subequal).

Antronicippe serrata Stock & Iliffe, 1990 View in CoL has a shallowly cleft telson with long marginal spines; the gnathopod propodi are very slender and their dactyli have serrated teeth on the inner margin; pereopod 7 basis is rounded and strongly lobate and the rami of uropods 1–2 are strongly unequal in length.