Labriphimedia martinae Coleman & Lörz 2013, sp. nov.
Creators: name: Coleman, Charles Oliver
name: Lörz, Anne-Nina
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Iphimediidae
Labriphimedia
Labriphimedia martinae

description: Labriphimedia martinae sp. nov.
Figs 7-11
urn:lsid:zoobank.org:act: D8ED7489-8474-4E50-9856-27119A69E933
Material examined
Holotype
♂, 6.5 mm, NIWA 84743.
Locus typicus
NEW ZEALAND: TAN0705/136, 14 April 2007, 43°17’25ˮ S, 175°33’08ˮ W – 43°17’36ˮ S, 175°33’47ˮ E, 638- 644 m.
Etymology
This species is named for the amiable Ms Martine Willcox, the mother of the son-in-law of the senior author.
Description
LENGTH. Based on male holotype, 6.5 mm.
HEAD (Fig. 7A). Eyes ovate; rostrum strongly curved; anterior margin with angular spine, anteroventral corner with an acute long narrow spine. Antenna 1 (Fig. 7 C-D) peduncular article 1 with a long distomedial spine and a small anterodistal spine; peduncular article 2 with longer dorsal and small spine, with an anterodistal spine; accessory flagellum present, accessory flagellum 1-articulate; article 3 with anterodistal process; article 4 subequal to 3. Antenna 2 (Fig. 7G) articles 2 and 3 serrate distomedially. Mouthparts arranged in a cone. Upper lip (Fig. 7B) tapering distally, apex asymmetrical. Mandibular body (Fig. 7E, F, I, H) tapering distally; incisor not dentate; lacinia mobilis on right side rather stout; molar not triturative, but protruding; palp 3 articulate, ratios of articles 1-3 1:2.75:1.5. Lower lip (Fig. 8A) inner lobes absent; lobes tapering distally into pointed apex. Maxilla 1 (Fig. 8 D-E) palp 1-articulate, much shorter than outer plate, very small scale with an apical seta. Maxilla 2 (Fig. 8 B-C, F) inner lobe considerably shorter than outer. Maxilliped (Fig. 8 G-J) inner lobe elongate, surpassing the distal margin of 1st palp article, with setae on the apex and 2 rows of setae along the medial margin; outer plate
tapering distally, bordered with plumose setae apically; palp consisting of 3 long articles and 1 minute distolateral article; 2nd palp article expanded distomedially.
PEREON (Fig. 7A). Pereonite 1 enlarged, 3-4 x as long as pereonite 2. Pereonites 5-6 posteroventral angle acute; that of pereonite 7 pointed and drawn out. Pereonite 7 without mid-dorsal carina, dorsodistal margin with 2 large pointed spines, space between spines widely excavate, with 1 posteroventral spine. Gnathopod 1 (Fig. 9 A-B) coxa subrectangular, ventrally truncated and serrate; basis slightly longer than coxa; carpus somewhat longer than propodus, both carpus and propodus narrow; setation restricted to anterior margin of basis and region of chela. Gnathopod 2 (Fig. 9 C-D) slightly shorter than gnathopod 1; coxa tapering, ventrally truncated, ventral margin with 2 notches with microtrichs; carpus and propodus subequal in length, strongly setose; Pereopod 3 (Fig. 9 E-F) coxa ventrally rounded, ventral margin weakly serrate; basis and ischium with rounded lobe distomarginally. Pereopod 4 (Fig. 10 A-B) coxa wide, apically rounded, with angular posteroventral corner, ventral margin serrate; posterior margin with rounded lobe; basis and ischium with rounded lobe distomarginally. Pereopod 5 (Fig. 11A) coxa wider than long, bilobate, posterior margin pointed; basis subrectangular, posterior margin straight, weakly serrate, posteroventral corner subquadrate, anterodistal angle pointed; ischium anterodistal angle pointed; merus drawn out posterodistally; carpus expanded distally, slightly shorter than propodus; dactylus not curved much, with small unguis. Pereopod 6 (Fig. 10D) coxa bilobate, anterior lobe shorter, with posteroventral spine; basis anterodistally pointed, posterodorsal corner subquadrate, posterior margin weakly serrate, posteroventral corner with small spine; ischium and merus as for pereopod 5. Pereopod 7 (Fig. 10C) coxa with posteroventral spine; basis anterodistally pointed, posterodorsal corner rounded, posterior margin weakly serrate, posteroventral corner with large spine; merus and carpus as for pereopod 5.
PLEON (Fig. 7A). Pleonite 1 with a low, truncated mid-dorsal carina with a small posterior point, with 2 large, pointed spines, space between spines wide. Epimeron 1 posterior margin with 1 mid-lateral spine, posteroventral corner acutely with short point. Pleonite 2 with a low truncated mid-dorsal carina with a small posterior point, dorsodistal margin with 2 large, pointed spines, space between spines wide. Epimeron 2 posterior margin with 1 mid-lateral spine, posteroventral corner pointed. Pleonite 3 with a broadly rounded, large mid-dorsal carina. Epimeron 3 posterior margin without well developed lateral spines, posteroventral corner produced into 1 smooth spine, its dorsal part minutely serrate. Urosomite 1 large with broadly rounded, large mid-dorsal carina with a shallow depression. Urosomite 2 shortest, smooth. Telson (Fig. 11F) truncate, with several small notches along the distal margin.
Distribution
Chatham Rise, New Zealand (South-western Pacific), 638- 644 m.
description: Published as part of Coleman, Charles Oliver & Lörz, Anne-Nina, 2013, Iphimediidae of New Zealand (Crustacea, Amphipoda), pp. 1-18 in European Journal of Taxonomy 62 on pages 10-16, DOI: 10.5852/ejt.2013.62, http://zenodo.org/record/3820698