identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
F10BB4749B6B589EA1182BDFD0945C5F.text	F10BB4749B6B589EA1182BDFD0945C5F.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Princaxelia kahat Duffy & Wainwright 2026	<div><p>Princaxelia kahat Duffy &amp; Wainwright sp. nov.</p><p>Figs 9, 10, 11, 12, 13, 14, 15</p><p>Princaxelia magna: Jamieson and Weston 2023: table 2.</p><p>Material examined.</p><p>Holotype. • Mature ♂, body length 59.3 mm; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=144.66853&amp;materialsCitation.latitude=12.2886" title="Search Plazi for locations around (long 144.66853/lat 12.2886)">Mariana Trench</a> (12°17.316'N, 144°40.112'E); 8,143 m; 5 Dec. 2014; Baited lander. USNM accession number USNM 1775248. GenBank ® accession number: 16 S: PZ 611773; 28 S: PZ 611782 .</p><p>Other material.</p><p>• 4 ♂, 2 ♀; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=142.5162&amp;materialsCitation.latitude=11.1667" title="Search Plazi for locations around (long 142.5162/lat 11.1667)">Mariana Trench</a> (11°10.002'N, 142°30.972'E); 8,000 m; 26 Jan. 2017; Baited lander. GenBank ® accession numbers: 16 S: PZ 611770 – PZ 611772; 28 S: PZ 611778 – PZ 611781 .</p><p>Diagnosis.</p><p>Primary flagellum article 1 of male antennae 1 elongate and longer than half the body. Accessory flagellum of male antennae 1 article 1 enlarged and flattened, with three small articles at distal end. Upper lip slightly asymmetrical. Maxilla 1 inner plate with six plumose setae; palp article 2 expanded with 16 apical robust setae. Maxilla 2 outer plate with three plumose setae. Maxilliped inner plate with one apical plumose seta. Dactylus of gnathopods 1 with three and gnathopod 2 with five strong projections on the posterior margin near the base. Dorsal margin of coxa 5 slightly lower on distal end. Ventral margin of coxa 7 shallowly concave. Telson lobes broad and tapering distally at last 1 / 3.</p><p>Description primarily based on holotype, male.</p><p>Head. (Figs 9, 10) Slightly shorter than length of pereonites 1 and 2 combined; rostrum very short, slightly pointed; lateral cephalic lobe prominent; corner rounded; eyes absent.</p><p>Antennae. (Fig. 11) Extremely elongate, over 70 percent body length. Peduncle articles 1–3 with length ratio 1.0: 0.5: 0.2; peduncular article one broadened, with several clusters of setae arranged in rows on ventral margin, some weakly plumose, sparse setae on dorsal margin; posterior of peduncular article 2 with short setae clusters. Primary flagellum article one thin and elongate with length 7 × width, dorsal submargin with dense clusters of thin sensory setae (aesthetascs), forming a callynophore. Primary flagella with 108 articles. Accessory flagellum 4 - articulate; article 1 elongate and scale-like with setae on posterodorsal margin; articles 2–4 tapered and setose. Antennae 2 dorsal margin of peduncular article 1 and ventral margin of article 2 with short setae clusters; peduncular article 3 elongate with sparse small setae. Article 4 damaged and flagella lost in collection.</p><p>Mouthparts. (Fig. 12) Upper lip medial face asetose, with asymmetrical ventral margin. Mandible lacinia mobilis present on left and right side, highly asymmetric, left lacinia mobilis broad and multi-dentate, 22 robust setae on setal row. Right lacinia mobilis thin with broad projection at proximal end; 21 robust setae on setal row. Mandible incisors with strong posterodistal projection, slightly asymmetric; molar absent. Mandible palp 3 - articulate, article 1 asetose, short; article 2 arched medially with 28 setae on medial margin; article 3 with many setae arranged in rows. Lower lip with distinct outer lobes present; mandibular process absent or severely reduced. Maxilla 1 inner plate small with six apical plumose setae; outer plate arched medially with 14 robust apical setae with one large claw-like projection at the distal end. Maxilla 1 palp 2 - articulate; article 1 subrectangular, setae on posterior; article 2 expanded distally with 16 apical and nine marginal robust setae, apical submargin with setae. Maxilla 2 inner plate with 16 plumose setae along apical to medial margin, outer plate thin with three plumose setae along the apical margin. Maxilliped with inner and outer plates and palp; inner plate small and subtriangular with one apical plumose setae, one additional robust setae on the ventral margin; outer plate rounded, reaching base of palp article 2, with robust setae along medial to apical margin. Maxilliped palp long, 4 - articulate; article 1 short, lateral margin with sparse short setae, medial margin with dense setae; article 2 longest article, similar pattern of setae as article 1; article 3 long, slightly shorter than article 2 with similar setae pattern; article 4 slender with strong claw-like projections on medial margin, tapered distally.</p><p>Body. Pereon with subrectangular pereonites, dorsal and ventral margin smooth; pleon with dorsal surface smooth; coxal gills present on gnathopod 2, pereopods 3–6; gills 2–4 elongate, gills 5 and 6 short and ovular; dorsal margins of urosomites 1 and 2 with single thorn-like projection each, pointed upward in urosomite 1, tapered distally in urosomite 2, urosomite 3 dorsal margin smooth.</p><p>Gnathopods. (Fig. 13 A – F) Gnathopod 1 coxa subrectangular and slightly bilobate, ventral margin straight; basis slightly arched distally, with sparse setae, length 1.78 × width; ischium small and subquadrate, single clump of setae near base of merus on posterior margin; merus broad, concave along proximal margin, ventral margin with evenly separated clumps of setae; carpus broad and rounded, length 2.3 × width, dorsal margin smooth with short sparse setae, lateral face asetose, posterior ventral submargin and medial face with dense clumps of setae; propodus narrower than carpus, posterior margin with dense setae, with one robust seta at ventral posterodistal corner; dactylus thin, ventral margin with setae, posterior margin with three strong projection near base. Gnathopod 2 coxa subrectangular and slightly bilobate; basis straight and elongate, length 1.7 × width, setae on posterior margin; ischium similar to gnathopod 1; merus more elongate than gnathopod 1 with numerous dense setae clumps on ventral submargin; carpus deep, subrectangular, length 2.3 × width, dorsal margin smooth with sparse setae, lateral face asetose, ventral submargin and medial face densely setose; propodus with numerous, broadly plumose setae, otherwise similar to gnathopod 1; dactylus with majority of posterior margin asetose with five strong projections near base.</p><p>Pereopods. (Figs 13 G – J, 14) Pereopod 3 coxa ovular, slightly bilobate along dorsal margin, ventral submargin rounded with sparse setae; basis elongate, anterior and posterior margin setose, large clump of setae on posterodistal angle; ischium anterior margin concave, dense clump of setae on posterodistal margin; merus, carpus, propodus, and dactylus length ratio 1.00: 0.91: 0.37: 0.37; merus elongate, distal margin tapered, dorsal and ventral margins straight, posterior margin setose; carpus elongate, rounded; dorsal margin asetose, posterior margin with dense setae. Propodus elongate, thin, anterior margin asetose, posterior margin with short setae; dactylus slender with single robust seta near distal end. Pereopod 4 similar to pereopod 3. Pereopod 5 coxa subrectangular, tapered near proximal end, dorsal margin slightly convex, ventral margin straight, sparsely setose, length 2.4 × width; basis broad and rectangular, length 3.4 × width, posterior margin with many thin setae, anterior margin sparsely setose, posterodistal corner rounded; merus thin, anterior and posterior margin setose; medial face setose; carpus slightly shorter than merus, with similar setae arrangement. Pereopod 6 coxa subrectangular, slightly tapered at distal end, ventral margin slightly concave, distal end sparsely setose; entire pereopod long and slender; basis broad, length 2.3 × width, posterodistal corner rounded. Pereopod 7 coxa slender and slightly tapered at distal end, ventral margin slightly concave, posterodistal margin with sparse setae, medial margin with large penile papillae faced medially.</p><p>Pleon and urosome. (Fig. 15) Epimeron setose on ventral submargin; epimeral plate 1 ventral margin curved with strong groove above the ventral margin, posterodistal corner pointed; epimeral plate 2 subrectangular, with strong groove above the ventral margin, posterodistal corner rounded; epimeral plate 3 subrectangular, posterodistal corner quadrate. Pleopods 1–3 with paired coupling setae (retinacula) on medial distal margin of peduncle; coupling setae with hooks on inner margin; rami of similar length; inner ramus with numerous bifid (clothespin) setae on inner basal margin; ramus articles wide. Uropod 1 peduncle longer than rami, 13 basofacial setae, distomedial projection strong; medial margin setose, sparse setae on lateral margin; outer ramus damaged, medial margin setose, lateral margin with few setae. Uropod 2 peduncle triangular, about same length as rami, eight basofacial setae, distomedial peduncular projection similar to uropod 1; rami with setae along medial margins, sparse setae on lateral margin; outer ramus damaged. Uropod 3 from holotype lost in collection. Female uropod 3 peduncle short and broad with sparse setae on the lateral margin and a row of plumose setae on the distomedial margin, rami ovular and flattened, lined with bases for long setae, most damaged or missing in collection, outer rami slightly tapered distally. Telson length 2.18 × width, cleft extending 89 % of length, lobes weakly tapered distally at last 1 / 3, apex of each lobe concave.</p><p>Sexual dimorphism.</p><p>Female specimens have a slender, setose 6 articulate accessory flagellum on antenna 1 (Fig. 11 D). Female individuals also have a much stronger distomedial peduncular projection on uropod 1 than males (Fig. 15 E), as well as shorter uropod rami. There is no significant difference in maximum sizes between male and female individuals.</p><p>Variable characters.</p><p>The number of basal projections on the dactylus of the gnathopods varied between specimens regardless of sex. The number of basal projections on gnathopod 1 varied from three to five, with four being the most common across examined specimens (see Fig. 13 K for typical arrangement and placement). The number of basal projections on gnathopod 2 varied between four, five, and six, with five being the most common across examined specimens. The number of dactylus projections on gnathopod 2 is always greater or equal to that of gnathopod 1. The number of setae on the mandible setal row varies between specimens, with the left having 20–26 setae and right having 16–21 setae. The number of robust setae on the inner plate of maxilla 1 can vary between 7–10 setae.</p><p>Differential diagnosis.</p><p>Princaxelia kahat sp. nov. can be differentiated from most other Princaxelia species by the presence of six plumose setae on the inner plate of maxilla 1, with the sole exception of P. magna which also shows this feature. Princaxelia kahat sp. nov. is morphologically very similar to P. magna, with key differences seen in Princaxelia kahat sp. nov. being a longer antennae 1, telson lobes that are broader and tapered laterally, and an upper lip that is much blunter than that seen illustrated for P. magna .</p><p>Etymology.</p><p>The specific epithet kahat is derived from a Chamorro word meaning “ to hunt stealthily, as if stalking or sneaking ”, referring to the observed predatory behaviour of Princaxelia . This also reflects its habitat, as it hunts under the darkness of the hadal zone. The name is treated as an indeclinable noun in apposition.</p></div>	https://treatment.plazi.org/id/F10BB4749B6B589EA1182BDFD0945C5F	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Duffy, Grady A.;Wainwright, Jennifer A.;Gonzalez, Brett C.;Bond, Todd;Jamieson, Alan J.	Duffy, Grady A., Wainwright, Jennifer A., Gonzalez, Brett C., Bond, Todd, Jamieson, Alan J. (2026): Two new species of Princaxelia (Crustacea, Amphipoda, Pardaliscidae) from hadal depths of the Tonga and Mariana trenches (Pacific Ocean). ZooKeys 1289: 303-334, DOI: 10.3897/zookeys.1289.204655
246DFB8B7AFE56028CBB560DDAF9A584.text	246DFB8B7AFE56028CBB560DDAF9A584.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Princaxelia malohi Duffy & Wainwright 2026	<div><p>Princaxelia malohi Duffy &amp; Wainwright sp. nov.</p><p>Figs 2 –8</p><p>Material examined.</p><p>Holotype. • Mature ♂, body length 35.1 mm; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-174.99817&amp;materialsCitation.latitude=-23.4873" title="Search Plazi for locations around (long -174.99817/lat -23.4873)">Tonga Trench</a> (23°29.238'S, 174°59.890'W); 8,200 m; 18 July 2024; Baited lander. NMNZ accession number: CR.028062, GenBank ® accession number CO 1: PZ 585448; 16 S: PZ 611777; 28 S: PZ 611786 .</p><p>Other material.</p><p>• 2 ♂, collection data same as holotype . • 1 ♂, 20.0 mm; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-174.99817&amp;materialsCitation.latitude=-23.4873" title="Search Plazi for locations around (long -174.99817/lat -23.4873)">Tonga Trench</a> (23°29.238'S, 174°59.890'W); 8,200 m; 18 July 2024; baited lander . • Juvenile, 16.6 mm; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-174.99843&amp;materialsCitation.latitude=-23.4801" title="Search Plazi for locations around (long -174.99843/lat -23.4801)">Tonga Trench</a> (23°28.806'S, 174°59.906'W), 8,350 m; 18 July 2024; baited lander. GenBank ® accession numbers 16 S: PZ 611774 – PZ 611776; 28 S: PZ 611783 – PZ 611785 .</p><p>Diagnosis.</p><p>Primary flagellum article 1 of male antennae 1 elongate. Accessory flagellum of male antennae 1 article 1 enlarged and flattened, with two small articles at distal end. Maxilla 1 inner plate with two plumose setae; palp article 2 expanded with 11 or 12 apical robust setae. Maxilla 2 outer plate with more than three plumose setae. Maxilliped inner plate with two apical setae. Dactylus of gnathopods 1 and 2 with a single strong projection on posterior margin near the base. Dorsal margin of coxa 5 straight. Ventral margin of coxa 7 shallowly concave. Telson lobes uniformly tapering distally with one apical spine per lobe.</p><p>Description based on holotype, male.</p><p>Head. (Fig. 4 A – C) Small, similar to length of pereonite 1; rostrum very short, slightly pointed; lateral cephalic lobe prominent; corner rounded, angled distally upward; eyes absent. Antennae 1 peduncle articles 1–3 with length ratio 1.0: 0.64: 0.35; peduncular article one broadened, with cluster of setae on ventral margin, some weakly plumose; posterior of peduncular articles 2 and 3 with short setae clusters. Primary flagellum article one thin and elongate with length 4 × width; dorsal submargin with large clusters of thin sensory setae (aesthetascs), forming a callynophore. Accessory flagellum 3 - articulate; article 1 elongate and flattened with setae on posterodorsal margin; articles 2 and 3 very short, about five percent of accessory flagellum. Primary flagella broken at article 19. Antennae 2 length 0.4 × body length. Posterior margin of peduncular articles 1 and 2 with short setae clusters; peduncular article 3 slightly longer than article 4. Flagellum with 36 articles.</p><p>Mouthparts. (Fig. 4 D – O) Upper lip medial face asetose, with asymmetrical setose ventral margin. Mandible lacinia mobilis present on left and right side, highly asymmetric, left lacinia mobilis broad and multi-dentate, right lacinia mobilis thin with broad projection at proximal end; setal row with 21 robust setae Mandible incisors with strong posterodistal projection, slightly asymmetric; molar absent. Mandible palp 3 - articulate, article 1 asetose, short; article 2 arched medially with 12 setae on medial margin; article 3 0.85 × length of article 2, with 17 setae across all margins. Lower lip setose with distinct outer lobes present; mandibular process absent or severely reduced. Maxilla 1 inner plate small with two apical plumose setae; outer plate arched medially with nine robust apical setae, one large claw-like projection at the distal end. Maxilla 1 palp 2 - articulate; article 1 subrectangular, setae on posterior; article 2 expanded distally with 13 apical and eight marginal robust setae, apical submargin with setae. Maxilla 2 inner plate with 15 plumose setae along apical to medial margin, outer plate slightly longer and thinner than inner plate with four plumose setae along the apical margin and two along lateral margin. Maxilliped with inner and outer plates and palp; inner plate small and subtriangular with two apical plumose setae; outer plate rounded, reaching base of palp article 2, with 29 robust setae along medial to apical margin. Maxilliped palp long, 4 - articulate; article 1 short, lateral margin with sparse setae, medial margin with dense setae; article 2 longest article, similar pattern of setae as article 1; article 3 long, slightly shorter than article 2 with similar setae pattern; article 4 slender with four strong claw-like projections on medial margin, tapered distally.</p><p>Body. (Figs 2, 3) Pereon with subrectangular pereonites, dorsal and ventral margin smooth; pleon with dorsal surface smooth; dorsal margin of urosomites 1 and 2 with single thorn-like projection each, tapered distally, urosomite 3 dorsal margin smooth. Coxal gills present on gnathopod 2, pereopods 3–6; gills 2–4 elongate, gills 5 and 6 short and ovular.</p><p>Gnathopods. (Figs 5 A – F, 6) Gnathopod 1 coxa subrectangular and slightly bilobate, ventral margin straight, posterior submargin with setae; basis slightly arched distally, with sparse setae on medial face, length 2.8 × width; ischium small and subquadrate, single clump of setae near base of merus on posterior margin; merus broad, concave along proximal margin, ventral margin with evenly separated clumps of setae; carpus deep and rounded, length 2 × width, dorsal margin smooth with setae sparse, lateral face asetose, posterior ventral submargin and medial face with dense clumps of setae; propodus narrower than carpus, posterior margin with dense setae; dactylus thin, dorsal and ventral margin with setae, posterior margin with one strong projection near base. Gnathopod 2 coxa subrectangular and slightly bilobate, ventral submargin with sparse setae; basis straight and elongate, length 3.8 × width, sparse setae on posterior margin; ischium similar to gnathopod 1 with denser posterior setae clump; merus more elongate than gnathopod 1, numerous setae clumps on ventral submargin; carpus deep, subrectangular, length 2.2 × width, dorsal margin smooth with sparse setae, lateral face asetose, ventral submargin and medial face densely setose; propodus similar to gnathopod 1, with the exception of having barbed robust setae (can be seen on the topmost setae of Fig. 6 C); dactylus with majority of posterior margin asetose, otherwise similar to gnathopod 1.</p><p>Pereopods. (Figs 5 G – J, 7) Pereopod 3 coxa ovular, slightly bilobate along dorsal margin, ventral submargin rounded with sparse setae; basis elongate, anterior and posterior margin setose, large clump of setae on posterodistal angle; ischium anterior margin concave, dense clump of setae on posterodistal margin; merus, carpus, propodus, and dactylus length ratio 1.0: 1.22: 1.19: 0.52; merus elongate, distal margin tapered, dorsal and ventral margins straight, posterior margin setose; carpus elongate, rounded; dorsal margin asetose, posterior margin with dense setae. Propodus elongate, thin, anterior margin asetose, posterior margin with short setae; dactylus slender with single robust seta near distal end. Pereopod 4 coxa ovular, not bilobate, slightly tapered proximally, asetose; basis, ischium, merus, carpus, and dactylus shape and setae arrangement similar to pereopod 3. Pereopod 5 coxa subrectangular, tapered near proximal end, dorsal margin slightly convex, ventral margin straight, sparsely setose, length 2.6 × width; basis broad and rectangular, length 2.9 × width, posterior margin with many thin setae, anterior margin sparsely setose, posterodistal corner rounded; ischium short and rectangular, anterodistal corner with clump of setae, anterior margin slightly concave; merus, carpus, propodus, and dactylus length ratio 1.0: 0.89: 1.47: 0.43; merus thin, anterior and posterior margin setose; medial face setose; carpus slightly shorter than merus, with similar setae arrangement; propodus elongate, 60 % longer than carpus, setae along anterior submargin and posterior margin; dactylus slender, one robust seta near the distal end. Pereopod 6 1.28 × longer than pereopod 5; coxa subrectangular, length 2.8 × width, slightly tapered at distal end, ventral margin slightly concave, distal end sparsely setose; entire pereopod long and slender, 1.28 × longer than pereopod 5; basis broad, length 2.4 × width, posterodistal corner quadrate; ischium similar to pereopod 5; merus, carpus, propodus, and dactylus similar to pereopod 5, length ratio 1.0: 1.16: 1.46: 0.31. Pereopod 7 1.04 × longer than pereopod 6; coxa slender, bilobate, rounded at distal end ventral margin slightly concave, posterodistal margin with sparse setae, medial margin with penile papillae; penial papillae large, rounded and faced medially; basis slightly broader than pereopod 6, length 2.11 × width; ischium, merus, carpus, propodus, and dactylus similar to pereopod 6.</p><p>Pleon and urosome. (Fig. 8) Pleopods with paired coupling setae (retinacula) on medial distal margin of peduncle; coupling setae with five hooks on inner margin; rami of similar length; inner ramus with numerous bifid (clothespin) setae on inner basal margin; ramus articles wide, with dense plumose setae along both side margins, article at distal end with additional plumose setae on ventral margin. Epimeron setose on ventral submargin; epimeral plate 1 ventral margin curved, with strong groove above the ventral margin, posterodistal corner rounded; epimeral plate 2 subrectangular with strong groove above the ventral margin, posterodistal corner subquadrate; epimeral plate 3 subrectangular, posterodistal corner quadrate. Uropod 1 peduncle longer than rami, seven basofacial setae, distomedial projection weak; inner ramus 0.8 × length of peduncle, medial margin setose, sparse setae on lateral margin; outer ramus damaged near the distal end, medial margin setose, lateral margin with few setae. Uropod 2 peduncle about same length as rami, three basofacial setae, distomedial peduncular projection similar to uropod 1; rami with setae along medial margins, sparse setae on lateral margin; inner ramus 1.1 × length of outer ramus. Uropod 3 peduncle short and subrectangular, length 2.2 × width, medial and lateral margins setose; rami paddle-like, wide, and ovular; inner ramus with setae on all margins; outer ramus with very short setae along medial margin, a single large bump on distal end. Telson length 2.5 × width, cleft extending 78 % of length, lobes weakly tapered distally with many setae, apex of each lobe concave, with one robust seta each.</p><p>Variations.</p><p>The maxilla 2 inner plate setae number varies with specimen size. One specimen (BL 33.5 mm, ♂) has four apical setae on the right maxilla 2 inner plate and three on the left. The robust setae of the outer plate of the maxilla 1 vary from seven to nine. Article 3 of the maxilliped with numbers of projections ranging from three to five.</p><p>Supplementary material.</p><p>In situ video footage was also captured from the baited landers dropped in the Tonga Trench (https://doi.org/10.5281/zenodo.20756281), which provides further insight on the locomotion and predation habits of Princaxelia .</p><p>Differential diagnosis.</p><p>Princaxelia malohi sp. nov. is the only member of Princaxelia to have two plumose setae on the inner plate of the maxilla 1 and consistently more than three plumose setae on the outer plate of the maxilla 2. It is also the only reported member of the genus to have a single basal projection on the dactylus of both gnathopods.</p><p>Etymology.</p><p>The specific epithet malohi is derived from the Tongan word for mighty or powerful. This refers to back to the status of this animal as a predator, where it uses its strength to subdue prey, as well as the adaptations it must have to survive in hadal depths. It is treated as an indeclinable noun in apposition.</p></div>	https://treatment.plazi.org/id/246DFB8B7AFE56028CBB560DDAF9A584	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Duffy, Grady A.;Wainwright, Jennifer A.;Gonzalez, Brett C.;Bond, Todd;Jamieson, Alan J.	Duffy, Grady A., Wainwright, Jennifer A., Gonzalez, Brett C., Bond, Todd, Jamieson, Alan J. (2026): Two new species of Princaxelia (Crustacea, Amphipoda, Pardaliscidae) from hadal depths of the Tonga and Mariana trenches (Pacific Ocean). ZooKeys 1289: 303-334, DOI: 10.3897/zookeys.1289.204655
