taxonID	type	description	language	source
03D1713A1C2E92279AE8F8B77E764200.taxon	description	TABLE 1. DIVA stations, where specimens were sampled, EBS, multicorer (MUC) and boxcorer (GBC) deployments. Diagnosis. Body oval, length at least 2.6 width. Head with conspicuous rostrum; rostrum triangular in dorsal view, anterior tip curved dorsally, acute, dorsal margin almost straight basally in males, strongly concave in females. Sutures between pereonites 5 – 7 and pleotelson visible in males, less distinct in females. Pleotelson processes large in males, distinctly smaller in females. Body surface (Fig. 2, details) covered by small depressions, merging into fine ridges on the surface of pleotelson. Antenna 1 article 1 slender, but wider than article 2. Flagellum in adult males and females with 4 articles. Antenna 2 dorsal tooth of article 3 somewhat shorter than article width, with 2 setae. Mandibular palp article 3 with 6 denticulate setae. Surface of carpus, propodus and dactylus covered with curved cuticular combs. Lateral apical combs of carpus setose, and in pereopods 2 – 7 of different size, outer comb slightly larger; additionally a slightly spinose dorsal comb. Dactylus accessory claw minute or absent. Pleopod 1 lateral margins of neck (narrowest part) with two setae each; distal margins undulating; distal setae of each side divided into a lateral group of 3 – 4 closely spaced shorter setae and a medial group of 3 widely spaced longer setae. Pleopod 2 endopod extending beyond distal margin of protopod, article 1 flexed slightly outwards, basal sperm chamber with at least one internal strut. Pleopod 3 outer plumose seta longest, exopod with 1 simple seta distally.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C2E92279AE8F8B77E764200.taxon	discussion	Remarks. Species of the Haploniscus unicornis complex can be recognized by their characteristic rostrum, which is triangular in dorsal view and has a typical sickle-shape in lateral view, especially in females. The Haploniscus unicornis complex belongs to a group of Haploniscus species (including also H. bicuspis (Sars, 1877) and H. spinifer Hansen, 1916), which is closely related to Mastigoniscus. This group of Haploniscus species shares some important characters with species of Mastigoniscus. These include the trend towards the elongation of the endopod of pleopod 2 in males and the setation of the pereopods, especially the lack of sensory setae (described as “ sensory spines ” in Brandt 1988), the ornamentation of the pereopods, especially the dorsal comb on the apical carpus, and the reduction of the accessory claw. Similarities also exist in the antennae and the somewhat flattened body shape, although these may be also found in other Haploniscus species. Yet, Mastigoniscus species lack a rostrum, contrary to the Haploniscus unicornis complex and also H. bicuspis, which has a small and inconspicuous rostrum. All these species share the pronounced sexual dimorphism. Therefore allocation of juveniles and females to a species, that is well defined by its adult males can be difficult within the whole group, especially since the distinguishing characters are largely restricted to the habitus and pleopods 1 and 2 of the males. The setation of the pereopods is rather conserved within Mastigoniscus and related species and distinguishing characters in the mouthparts are nearly absent within the whole family.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C2892209AE8FF4D791642EC.taxon	materials_examined	Holotype: DIVA 2 - HA 233, adult male (stage VI), length 1.7 mm, coll.: RV Meteor, M 63 / 2, DIVA 2 expedition, EBS station 89 - 6, 0 ° 42.95 ’ N 5 ° 31.29 ’ W, Guinea Basin, southeast Atlantic, ZMH K- 42426. Paratypes: DIVA 2 - HA 330, adult male, length 1.8 mm, same locality as holotype, ZMH K- 42427. DIVA 1 - HA 235, adult male, length 1.75 mm, DIVA 1 - HA 276, adult male, length 1.87 mm, coll.: RV Meteor, M 48 / 1, DIVA 1 expedition, EBS station 340 - 9, 18 ° 18.3 ’ S 4 ° 41.3 ’ E, 5395 m, Angola Basin, southeast Atlantic, ZMH K- 42428.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C2892209AE8FF4D791642EC.taxon	etymology	Etymology. From the Latin bi, meaning “ two ” and hastatus, “ armed with a hasta ”, a spear used by early Roman legionnaires. The name refers to the shape of the two large pleotelson processes, which resemble that of a hasta spearhead.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C2892209AE8FF4D791642EC.taxon	diagnosis	Diagnosis. Rostrum 0.5 head length. Pereonites 3 – 5 broadest. Posterior angles of pereonite 4 and anterior angles of pereonite 5 slightly produced; posterior body outline constricted in dorsal view, due to strong narrowing of posterior pereonites. Lateral margins of pleotelson slightly convex; pleotelson process length 0.9 pleotelson length, 2.7 width. Pleopod 1 lateral margins tapering only slightly, abruptly narrowing into neck (narrowest part); distance basal margin – neck 0.8 total length, neck width 0.4 maximum width; distolateral margins with small process each. Pleopod 2 protopod inner margin strongly concave; endopod length nearly 3.0 protopod length, 11.0 width; article 2 length 8.1 article 1 length.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C2892209AE8FF4D791642EC.taxon	description	Description (stage VI male). Body (Fig. 2 A – C) length 2.6 width. Head length 0.6 width. Pereonites 1 and 7 narrowest. Posterior angles of pereonites 2 – 7 and anterior angles of pereonites 3 – 5 acute;. Pleotelson length 0.3 body length, 0.8 width. Antenna 1 (Fig. 3 F) peduncular article 1 length 1.6 width, with 2 penicillate setae distally; article 2 length 1.1 article 1 length, 2.0 width, with 2 simple and 4 penicillate setae distally; article 3 length 0.4 article 1 length, width 0.4 article 1 width, with 1 simple seta distally. Flagellum with 4 articles; article 1 shortest, article 2 longest, about 2.0 article 1 length, with 1 aesthetasc; article 3 with 2 aesthetascs and 1 simple seta, article 4 with 3 aesthetascs and 3 simple setae. Antenna 2 (Fig. 3 E) peduncular articles 1 and 2 of subequal length and subequal width, article 2 with 2 simple setae; article 3 length 1.8 article 2 length, 1.3 width, with 1 simple seta distally, dorsal tooth with 2 simple setae; article 4 length 0.7 article 3 length, 0.9 width; article 5 length 2.2 article 3 length, 2.6 width, with at least 1 small penicillate seta and 1 simple seta; distal articles missing. Pereopods (Figs 3 A – D; 4 A – C): Basis of all pereopods with 2 long simple setae dorsally; basis of pereopods 2 and 3 with 2 penicillate setae, of pereopods 4 – 6 with 3 penicillate setae, of pereopod 7 with 1 penicillate seta dorsally. Ischium with 1 or 2 setae dorsally and ventrally each. Merus with 2 simple setae of different length distoventrally and 1 or 2 setae distodorsally, dorsal seta of pereopod 1 long and stout. Carpus with 2 or 3 simple setae ventrally; pereopods 2 – 7 with 1 penicillate seta (broken off on pereopod 4) and 1 short simple seta (broken off on pereopods 3, 4 and 6) distodorsally. Propodus with 2 – 5 setae ventrally, peropods 2 – 7 with 1 simple seta distodorsally (broken off on pereopods 4, 5 and 7), pereopod 5 with 1 penicillate seta distodorsally (broken off on pereopods 2 – 4, 6 and 7). Dactylus of pereopod 1 with 5, of pereopods 2 – 4 with 3 and of pereopods 6 – 7 with 1 or 2 setae near insertion of unguis. Pleopod 1 (Fig. 5 A) length 0.8 pleotelson length, 2.0 width; widest part after 0.25 of its length. Pleopod 2 (Fig. 5 B) protopod length 2.3 width, with about 10 long setae along outer margin. Pleopod 3 (Fig. 5 C) endopod length 1.9 width. Exopod length 0.6 endopod length, 2.7 width. Pleopod 4 (Fig. 5 D) endopod length 2.1 width. Exopod length 0.5 endopod length, 3.4 width, plumose seta length about 2.3 exopod length. Pleopod 5 (Fig. 5 E) length 2.3 width. Uropod (Fig. 2 C) distal article extending beyond posterior margin, not reaching tips of pleotelson processes.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C2892209AE8FF4D791642EC.taxon	distribution	Distribution. Found in the Guinea Basin and Angola Basin, Southeast Atlantic.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C25922D9AE8FF4D7EEF43B4.taxon	materials_examined	Holotype: DIVA 2 - HA 549, adult male, length 1.66 mm, coll.: RV Meteor, M 63 / 2, DIVA 2 expedition, MUC station 99, 0 ° 37.20 ’ N 6 ° 28.14 ’ W, 5167 m, Guinea Basin, southeast Atlantic, ZMH K- 42429. Paratype: DIVA 2 - HA 234, adult male (stage VI), length 1.67 mm, coll.: RV Meteor, M 63 / 2, DIVA 2 expedition, EBS station 89 - 6, 0 ° 42.95 ’ N 5 ° 31.29 ’ W, 5142 m, Guinea Basin, ZMH K- 42430.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C25922D9AE8FF4D7EEF43B4.taxon	etymology	Etymology. Monoceros is the Greek name of the constellation “ Unicorn ” and alludes to Haploniscus unicornis (Latin “ single-horned ”), the eponymous species of the complex.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C25922D9AE8FF4D7EEF43B4.taxon	diagnosis	Diagnosis. Rostrum length 0.5 head length. Pereonites 3 – 5 broadest, body tapering slightly anteriorly and posteriorly. Lateral margins of pleotelson tapering posteriorly, pleotelson process length 0.5 pleotelson length, 1.9 width. Pleopod 1 lateral margins tapering continuously into neck; distance basal margin – neck 0.8 total length, neck width 0.3 maximum width. Pleopod 2 endopod only slightly elongated, total length 1.3 protopod length, 6.0 width; article 2 length 3.5 article 1 length.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C25922D9AE8FF4D7EEF43B4.taxon	description	Description (stage VI male). Body (Fig. 6 A – F) length 2.7 width. Head length 0.7 width. Posterior angles of pereonites 2 – 7 and anterior angles of pereonites 3 – 5 acute. Pleotelson length 0.3 body length, 0.8 width. Antenna 1 (Fig. 7 G) peduncular article 1 length 1.6 width, with 3 penicillate setae distally; article 2 length 1.3 article 1 length, 2.45 width, with 1 simple and 4 penicillate setae distally; article 3 length 0.3 article 1 length, width 0.5 article 1 width, with 2 simple setae distally. Flagellum with 4 articles; article 1 shortest, with 2 penicillate setae; article 2 longest, about 2.8 article 1 length, with 1 aesthetasc and 1 simple seta; article 3 with 2 aesthetascs and 1 simple seta, article 4 with 3 aesthetascs (one broken off), 2 simple setae and 1 small penicillate seta. Antenna 2 (Fig. 7 F) peduncular article 2 with 2 simple setae; article 3 length 1.9 width, with 2 long simple setae dorsally, dorsal tooth with 2 simple setae; article 4 0.6 article 3 length, 1.1 width, with 2 simple setae distally; distal articles missing. Pereopods (Figs 7 A – E; 8 C, D): Basis of all pereopods with 2 long simple setae ventrally; basis of pereopods 2 and 3 with 2 penicillate setae, of pereopods 4 – 7 with 3 penicillate setae dorsally (2 broken off on pereopod 6). Ischium with 1 – 2 simple setae dorsally and ventrally each. Merus with 2 setae of different length distoventrally; pereopod 1 with 4, pereopod 2 with 3, pereopods 3 – 7 with 2 setae distodorsally, 1 dorsal seta of pereopod 1 long and stout. Carpus with 2 or 3 simple setae ventrally; pereopods 1 – 6 with 1 short simple seta (broken off on pereopod 7) distodorsally, pereopods 2 – 7 with 1 penicillate seta (broken off on some pereopods) distodorsally. Propodus with 3 – 5 setae ventrally, peropods 1 – 3 with 1 simple seta distodorsally (broken off on remaining pereopods), pereopods 2 – 7 with 1 penicillate seta distodorsally. Dactylus of pereopod 1 with 5, of pereopods 2 – 3 with 4 and of pereopods 6 – 7 with 2 setae near insertion of unguis (distal propodus and dactylus missing on pereopods 4 and 5). Pleopod 1 (Fig. 8 A) length 0.8 pleotelson length, about 2.3 width; widest part after about 0.20 of its length. Pleopod 2 (Fig. 8 B) protopod length 1.9 width, with about 9 long setae along outer margin. Pleopod 3 (Fig. 8 E) endopod length 1.6 width. Exopod length 0.7 endopod length, 2.0 width. Pleopod 4 (Fig. 8 F) endopod length 2.1 width. Exopod length 0.6 endopod length, 3.1 width, plumose seta length about 1.7 exopod length. Pleopod 5 (Fig. 8 G) length 2.4 width. Uropod (Fig. 6 E) extending beyond posterior margin, not reaching tips of pleotelson processes.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C25922D9AE8FF4D7EEF43B4.taxon	distribution	Distribution. Found in the Guinea Basin, Southeast Atlantic.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C3C92349AE8FF4D791642F1.taxon	materials_examined	Holotype: DIVA 2 - HA 510, adult male (stage VI), length 1.51 mm, coll.: RV Meteor, M 63 / 2, DIVA 2 expedition, EBS station 90 - 7, 0 ° 40.49 ’ N 5 ° 29.71 ’ W, 5142 m, Guinea Basin, southeast Atlantic, ZMH K- 42431. Paratypes: DIVA 2 - HA 416, adult male, length 1.55 mm, same locality as holotype, ZMH K- 42432. DIVA 2 - HA 235 – 237, - HA 331, adult males, length 1.45 – 1.54 mm, coll.: RV Meteor, M 63 / 2, DIVA 2 expedition, EBS station 89 - 6, 0 ° 42.95 ’ N 5 ° 31.29 ’ W, 5142 m, Guinea Basin, ZMH K- 42433. DIVA 1 - HA 56, adult male, length 1.49 mm, coll.: RV Meteor, M 63 / 2, DIVA 1 expedition, EBS station 318 - 1, 22 ° 20.0 ’ S 3 ° 18.3 ’ E, 5125 m, Angola Basin, ZMH K- 42434. DIVA 1 - HA 264, adult male, length 1.63 mm, coll.: RV Meteor, M 63 / 2, DIVA 1 expedition, EBS station 340 - 1, 18 ° 18.3 ’ S 4 ° 41.3 ’ E, 5395 m, Angola Basin, ZMH K- 42435.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C3C92349AE8FF4D791642F1.taxon	etymology	Etymology. The Greek machairis is the diminutive for machaira, the name for a bent sword. The name refers to the rostrum, which has a similar shape.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C3C92349AE8FF4D791642F1.taxon	diagnosis	Diagnosis. Rostrum 0.5 head length. Pereonites 4 and 5 broadest, body tapering anteriorly and posteriorly; posterior angles of pereonite 4 and anterior angles of pereonite 5 slightly produced. Lateral margins of pleotelson tapering posteriorly. Pleotelson process length 0.5 pleotelson length, 2.0 width. Pleopod 1 lateral margins tapering continuously towards neck, slightly convex; distance basal margin – neck 0.8 total length, neck width 0.5 maximum width. Distolateral margins with minute process each. Pleopod 2 inner margin concave; endopod length 2.8 protopod length, 10.0 width; article 2 length 4.3 article 1 length.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C3C92349AE8FF4D791642F1.taxon	description	Description (stage VI male). Body (Fig. 9 A – C) length 2.6 width. Head length 0.6 width. Posterior angles of pereonites 2 – 7 and anterior angles of pereonites 3 – 5 acute. Pleotelson length 0.3 body length, 0.9 width. Antenna 1 (Fig. 10 G) peduncular article 1 length 1.8 width, with 3 penicillate setae distally; article 2 length 1.05 article 1 length, 2.2 width, with 2 simple and 4 penicillate setae distally; article 3 length 0.3 article 1 length, width 0.5 article 1 width, with 2 simple setae distally. Flagellum with 4 articles; article 1 shortest, articles 2 – 4 of subequal length about 1.5 article 1 length; article 2 with 1 aesthetasc and 1 simple seta; article 3 with 2 aesthetascs, article 4 with 2 aesthetascs and 2 simple setae. Antenna 2 (Fig. 10 F) peduncular article 2 with 1 simple seta; article 3 length 1.75 width, with 1 simple seta distally and 2 simple setae dorsally, dorsal tooth with 2 simple setae; article 4 0.8 article 3 length, 1.4 width, with 2 simple setae; article 5 length 1.6 article 3 length, 2.5 width, with at least 7 simple setae; article 6 length 2.2 article 3 length, 5.0 width, with at least 3 penicillate and 4 simple setae. Flagellum with 11 articles, each article with up to 4 simple setae. Pereopods (Figs 10 A – E; 11 A, B): Basis of all pereopods with 2 long simple setae ventrally; basis of pereopods 2 – 4 with 2 penicillate setae, of pereopods 5 – 6 with 3 penicillate setae, of pereopod 7 with 1 penicillate seta dorsally. Ischium with 1 seta dorsally and 1 or 2 setae ventrally. Merus with 2 simple setae of different length distodorsally, and 2 or 3 setae distoventrally. Carpus with 2 or 3 simple setae ventrally; with 1 short simple seta, pereopods 2 – 7 with 1 penicillate seta distodorsally. Propodus with 2 – 5 setae ventrally, peropods 1 – 3 with 1 simple seta distodorsally (broken off on pereopods 4 – 7), pereopods 2 – 7 with 1 penicillate seta distodorsally (broken off on pereopod 6). Dactylus of pereopods 1 – 4 with 4 and of pereopods 5 – 7 with 2 setae near insertion of unguis. Pleopod 1 (Fig. 11 C) length 0.6 pleotelson length, 1.9 width; widest part after 0.2 of its length. Pleopod 2 (Fig. 11 D) protopod length 2.1 width, with about 9 long setae along outer margin. Pleopod 3 (Fig. 11 E) endopod length 1.9 width. Exopod length 0.7 endopod length, 1.7 width. Pleopod 4 (Fig. 11 F) endopod length 2.3 width. Exopod length 0.6 endopod length, 2.7 width, plumose seta broken off. Pleopod 5 (Fig. 11 G) length 2.2 width. Uropod (Fig. 9 C) extending beyond posterior margin, not reaching tips of pleotelson processes.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C3C92349AE8FF4D791642F1.taxon	distribution	Distribution. Found in the Guinea Basin and Angola Basin, Southeast Atlantic.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C3892309AE8FF4D7E0E4389.taxon	materials_examined	Holotype: DIVA 1 - HA 213, adult male (stage VI), length 1.64 mm, coll.: RV Meteor, M 48 / 1, DIVA 1 expedition, EBS station 344, 17 ° 06.2 ’ S 4 ° 41.7 ’ E, 5415 m, Angola Basin, southeast Atlantic, ZMH K- 42436. Paratypes: DIVA 1 - HA 75, adult male, length 1.72 mm, same locality as holotype, ZMH K- 42437. DIVA 1 - HA 179, adult male, length 1.72 mm, coll.: RV Meteor, M 48 / 1, DIVA 1 expedition, EBS station 348, 16 ° 18.1 ’ S 5 ° 27.2 ’ E, 5390 m, Angola Basin, ZMH K- 42438.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C3892309AE8FF4D7E0E4389.taxon	etymology	Etymology. Named after the type locality in the Angola Basin.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C3892309AE8FF4D7E0E4389.taxon	diagnosis	Diagnosis. Rostrum 0.5 head length. Pereonites 4 and 5 broadest, body tapering slightly anteriorly and posteriorly. Lateral margins of pleotelson tapering posteriorly; pleotelson process length 0.5 pleotelson length, 1.9 width. Pleopod 1 lateral margins tapering continuously into neck; distance basal margin – neck 0.7 total length, neck width 0.45 maximum width. Pleopod 2 endopod length 1.1 protopod length, 5.2 width; article 2 length 2.85 article 1 length.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C3892309AE8FF4D7E0E4389.taxon	description	Description (stage VI male). Body (Fig. 12 A – D) length 2.5 width. Head length 0.6 width. Posterior angles of pereonites 2 – 7 and anterior angles of pereonites 2 – 5 acute. Pleotelson length 0.3 body length, 0.8 width. Antenna 1 (Fig. 13 B) peduncular article 1 length 1.5 width, with 3 penicillate setae and 1 simple seta distally; article 2 length 1.2 article 1 length, 2.0 width, with 3 penicillate setae distally; article 3 length 0.4 article 1 length, width 0.4 article 1 width, with 1 simple seta distally. Flagellum with 4 articles; article 1 shortest, with 1 penicillate seta; articles 2 – 4 of subequal length, about 2.9 article 1 length, articles 2 and 3 with 1 aesthetasc and 1 simple seta each; article 4 with 4 aesthetascs, 2 simple setae and 1 small penicillate seta. Antenna 2 (Fig. 13 A) peduncular article 2 with 1 simple seta; article 3 length 1.65 width, dorsal tooth, with 2 simple setae (one broken off); article 4 0.6 article 3 length, 0.9 width; article 5 length 1.3 article 3 length, 2.2 width; article 6 length 1.5 article 3 length, 4.2 width, with at least 3 penicillate setae. Flagellum with 10 articles, each article with up to 6 simple setae. Pereopods (Figs 13 C – G; 14 A, B): Basis of all pereopods with 2 long simple setae ventrally; basis of pereopods 2 – 4 with 1 – 2 penicillate setae, of pereopods 5 and 6 with 2 or 3 penicillate setae, of pereopod 7 with 1 penicillate seta dorsally. Ischium with 1 – 2 simple setae dorsally and ventrally each. Merus with 2 setae of different length distoventrally and distodorsally. Carpus with 2 or 3 simple setae ventrally; distal carpus of pereopods 1 – 4 with 1 short simple seta (broken off on pereopods 5 – 7) dorsally, pereopods 2 – 7 with 1 penicillate seta (broken off on pereopod 3) distodorsally. Propodus with 3 – 5 setae ventrally, peropods 2 – 4 with 1 simple seta distodorsally (broken off on remaining pereopods), pereopods 2 – 7 with 1 penicillate seta distodorsally (broken off on some pereopods). Dactylus of pereopods 1 and 2 with 5, of pereopods 3 – 4 with 4 and of pereopods 5 – 7 with 1 – 2 setae near insertion of unguis. Pleopod 1 (Fig. 14 D) length 0.7 pleotelson length, about 2.1 width; widest part after 0.15 of its length. Pleopod 2 (Fig. 14 E) protopod length 1.8 width, with about 8 long setae along outer margin. Pleopod 3 (Fig. 14 C) endopod length 2.2 width. Exopod length 0.7 endopod length, 1.9 width. Pleopod 4 (Fig. 14 F) endopod length 1.8 width. Exopod length 0.6 endopod length, 2.7 width, plumose seta length about 1.8 exopod length. Pleopod 5 (Fig. 14 G) length 1.9 width. Uropod (Fig. 12 D) extending beyond posterior margin, not reaching tips of pleotelson processes.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C3892309AE8FF4D7E0E4389.taxon	diagnosis	Diagnosis. Found in the Angola Basin, Southeast Atlantic.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C3892329AE8F8C87F7945BF.taxon	description	Synonymy: Haploniscus unicornis Menzies, 1956: 8, fig. 3; Menzies, 1962: 96, fig. 6 E – G.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C3892329AE8F8C87F7945BF.taxon	materials_examined	Holotype: female stage V, 1.7 mm, slightly damaged. AMNH cat. no. 11759, coll: RV Vema, 12 November 1956, V- 7 - 1, north rim, Puerto Rico Trench, Atlantic, 20 ° 32.2 ’ N 60 ° 28.1 ’ W, 4983 – 5001 m depth.	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
03D1713A1C3892329AE8F8C87F7945BF.taxon	description	Description (holotype female). Body (Fig. 15 A, B, E) oval, length about 2.8 width. Head length 0.6 width. Rostrum damaged. Lateral margins of pereonites damaged, pereonites 3 – 6 broadest, body tapering anteriorly and posteriorly. Posterior angles of pereonites 3 – 7 and anterior angles of pereonites 3 – 4 acute; posterior part of pereonite 7 as wide as basis of pleotelson, resulting in smooth outline of posterior body in dorsal view. Pleotelson length 0.35 body length, 1.2 width, lateral margins tapering posteriorly; pleotelson process length 0.1 pleotelson length, 1.2 width. Antenna 2 (Fig. 15 C) peduncular article 3 length about 1.4 width, dorsal tooth shorter than article width; article 4 0.7 article 3 length, 1.1 width; distal articles missing. Maxilliped with 3 retinacula (contrary to Menzies’ original description). Distribution. Known from the type locality in the Puerto Rico Trench and from South of the Azores (Chardy 1974; see discussion).	en	Brökeland, Wiebke (2010): Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae). Zootaxa 2536: 1-35, DOI: 10.5281/zenodo.196630
