identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
03FA881D4C02FFF742DFFB50A790FE16.text	03FA881D4C02FFF742DFFB50A790FE16.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Lampanyctus mendeleevi Clements & Stewart 2026	<div><p>Lampanyctus mendeleevi New Species, ANZAC lanternfish Figs. 1–4</p><p>Lampanyctus sp. Paulin et al. 1989:254 (Listed)</p><p>Lampanyctus n. sp. Roberts et al. 2009: 531 (Checklist)</p><p>Lampanyctus sp. A Flynn &amp; Pogonoski 2012: 111 (photographs, identifying features listed)</p><p>Lampanyctus sp. ANZAC lanternfish (Checklists) Roberts et al. 2015: S160. Roberts et al. 2017: 68; Roberts et al. 2019:70; Roberts et al. 2020:70; Roberts et al. 2023:77</p><p>Lampanyctus sp. ANZAC lanternfish. Robertson &amp; Clements 2015: 628 (key), 665 brief description, illustration, distribution map.</p><p>Holotype: NMNZ P.043195; 55.5 mm; RV James Cook Sta. JCO 8610/022; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=177.64667&amp;materialsCitation.latitude=-39.973335" title="Search Plazi for locations around (long 177.64667/lat -39.973335)">Hikurangi Trough, off Hawke’s Bay</a> 39 o 58.4'S, 177 o 38.8'E; 22 Aug. 1986, 1140hrs; FMMWT 952m max. depth.</p><p>Paratypes: n =26 (27.2–61.3 mm SL) NMNZ P.008978; (2 specimens, 43.2 &amp; 61.3 mm SL); RV James Cook Sta. JCO 7913/021; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.62&amp;materialsCitation.latitude=-40.195" title="Search Plazi for locations around (long 179.62/lat -40.195)">East of Mahia Peninsula, east coast North Island</a>. 39 o 01.0'S, 178 o 27.1'E; 1 Oct. 1979, 2325hrs; FMMWT 30m max. depth. NMNZ P.031575; (1 sppm., 61.0 mm SL); RV James Cook Sta. JCO 8610/020; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.62&amp;materialsCitation.latitude=-40.195" title="Search Plazi for locations around (long 179.62/lat -40.195)">Hikurangi Trough</a>, off 40 o 20.7'S, 178 o 18.4'E; 21 Aug. 1986, 1414hrs; FMMWT 1000m max. depth. NMNZ P.043196; (3 specimens, 32.2, 32.7 &amp; 33.0 mm SL); RV James Coo k Sta. JCO 8109/068; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.62&amp;materialsCitation.latitude=-40.195" title="Search Plazi for locations around (long 179.62/lat -40.195)">Poverty Sea Valleys, Hikurangi Trough</a>. 39 o 09.9'S, 179 o 07.4'E; 4 Jun. 1981, 2258hrs; FMMWT 30m max. depth. NMNZ P.043197; (2 specimens, 41.1 &amp; 43.7 mm SL); RV James Cook Sta. JCO 8516/003; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.62&amp;materialsCitation.latitude=-40.195" title="Search Plazi for locations around (long 179.62/lat -40.195)">central Tasman Basin</a>. 43 o 07.8'S, 159 o 28.2'E; 15 Oct. 1985, 2067hrs; FMMWT 50m max. depth. NMNZ P.043198; (2 specimens, 32.0 &amp; 55.2 mm SL); RV James Cook Sta. JCO 8109/067; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.62&amp;materialsCitation.latitude=-40.195" title="Search Plazi for locations around (long 179.62/lat -40.195)">Poverty Sea Valleys, Hikurangi Trough</a>. 39 o 09.5'S, 179 o 09.3'E; 4 Jun. 1981, 2141hrs; FMMWT 60m max. depth. NMNZ P.043199; (1 sppm., 28.4 mm SL); RV James Cook Sta. JCO 8610/105; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.62&amp;materialsCitation.latitude=-40.195" title="Search Plazi for locations around (long 179.62/lat -40.195)">Ritchie Banks, Hikurangi Trough</a>. 39 o 40.3'S, 178 o 22.3'E; 5 Aug. 1986, 1430hrs; FMMWT 680m max. depth. NMNZ P.043201; (1 sppm., 37.9 mm SL); RV James Coo k Sta. JCO 8611/071; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.62&amp;materialsCitation.latitude=-40.195" title="Search Plazi for locations around (long 179.62/lat -40.195)">Taranaki Bight, west of Cape Taranaki</a>. 38 o 59.7'S, 172 o 00.0'E; 25 Sep. 1986, 1840hrs; FMMWT 255m max. depth. NMNZ P.043202; (1 sppm., 31.3 mm SL); RV James Cook Sta. JCO 8611/069; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.62&amp;materialsCitation.latitude=-40.195" title="Search Plazi for locations around (long 179.62/lat -40.195)">north–east Challenger Plateau.</a> 39 o 26.5'S, 171 o 00.9'E; 25 Sep. 1986, 0252hrs; FMMWT 96m max. depth. NMNZ P.043204; (5 specimens, 27.3, 29.2, 30.9, 32.1 &amp; 32.2, mm SL); RV James Cook Sta. JCO 8611/068; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.62&amp;materialsCitation.latitude=-40.195" title="Search Plazi for locations around (long 179.62/lat -40.195)">north–east Challenger Plateau.</a> 39 o 28.7'S, 171 o 01.7'E; 25 Sep. 1986, 0143hrs; FMMWT 58m max. depth. NMNZ P.043205; (5 specimens, 31.4, 32.1, 32.9, 32.9 &amp; 35.96 mm SL); RV James Cook Sta. JCO 8611/065; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.62&amp;materialsCitation.latitude=-40.195" title="Search Plazi for locations around (long 179.62/lat -40.195)">Challenger Plateau north–west of Cape Farewell.</a> 39 o 51.7'S, 171 o 01.8'E; 24 Sep. 1986, 2048hrs; FMMWT 23m max. depth. NMNZ P.043229; (2 specimens, 21.3 &amp; 28.0 mm SL); RV James Cook Sta. JCO 8008/076; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.62&amp;materialsCitation.latitude=-40.195" title="Search Plazi for locations around (long 179.62/lat -40.195)">East Cape Ridge.</a> 38 o 31.3'S, 179 o 37.2'E; 24 Apr. 1986, 1913hrs; FMMWT 150m max. depth. NMNZ P.054996; (1 sppm., 40.7 mm SL); RV James Cook Sta. JCO 8616/006; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.62&amp;materialsCitation.latitude=-40.195" title="Search Plazi for locations around (long 179.62/lat -40.195)">northern central Tasman Basin</a>. 40 o 11.7'S, 160 o 1 2.5'E; 16 Oct. 1985, 2029hrs; 2x2 plankton net 50m max. depth .</p><p>Additional non-type material: (n = 8) NMNZ P.008922; (2 specimens, 34 &amp; 38 mm SL); R / V <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.26334&amp;materialsCitation.latitude=-38.338333" title="Search Plazi for locations around (long 179.26334/lat -38.338333)">James Coo</a> k Sta. JCO 7913/009; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.26334&amp;materialsCitation.latitude=-38.338333" title="Search Plazi for locations around (long 179.26334/lat -38.338333)">East Cape Ridge.</a> 38 o 22.1'S, 178 o 57.1'E; 30 Sep. 1979, 2320hrs; FMMWT 30m max. depth. NMNZ P.008970; (1 sppm., 28 mm SL); R / V James Cook Sta. JCO 7815/023; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.26334&amp;materialsCitation.latitude=-38.338333" title="Search Plazi for locations around (long 179.26334/lat -38.338333)">Southern Challenger Plateau.</a> 41 o 43.7'S, 171 o 19.4'E; 26 Aug. 1978, 0820hrs; BONGO net 100m. NMNZ P.043194; (3 specimens 31.5, 32.1 &amp; 33.0 mm SL); RV James Cook Sta. JCO 8109/079; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=179.26334&amp;materialsCitation.latitude=-38.338333" title="Search Plazi for locations around (long 179.26334/lat -38.338333)">southern Kermadec Trench</a> off East Cape. 38 o 21.0'S, 179 o 16.1'E; 5 Jun. 1981, 2022hrs; FMMWT 30m max. depth. NMNZ P.043200; (2 specimens, 30.6 &amp; 33.7 mm SL); R / V James Cook Sta. JCO 8109/081; East Cape Ridge. 38 o 20.3'S, 179 o 15.8'E; 5 Jun 1981, 2240hrs; FMMWT 30m max. depth.</p><p>Diagnosis: Lampanyctus mendeleevi may be distinguished from all other Lampanyctus species by the following combination of characteristics: pectoral fin long, reaching to or just past anal-fin origin; no cheek photophores; no luminous gland at the base of the adipose fin; SAO 3 directly above AOa 1; anal fin usually with 15–16 rays; the infracaudal gland occupies the entire length of the caudal peduncle, and is dorsally expanded to be in contact with or less than ½ a photophore diameter away from the AOp series (see figure 3). For comparative diagnosis see discussion.</p><p>Description: Measurements (% SL) Holotype, range and mean of paratypes in parentheses: HL 28.3 (25.4–31.5, ¯x 28.7); UJL 20.0 (17.4–23.2, ¯x 20.8); ED 8.3 (6.1–8.2, ¯x 7.3); HD 19.6 (17.6–20.4, ¯x 19.3); BD 20.0 (17.0–21.4, ¯x 18.7); DF 16.0 (13.1–16.9, ¯x 15.1); AF 19.6 (18.1–21.4, ¯x 19.4); LCP 22.5 (16.4–21.9, ¯x 19.4); DCP 9.5 (8.0–11.1, ¯x 9.4); PD 47.9 (45.8–52.8, ¯x 48.6); PV 43.4 (40.4–46.1, ¯x 43.0); PP 29.4 (28.4–32.9, ¯x 30.7); PA 58.0 (55.9–61.6, ¯x 57.8); Pad 79.3 (75.7–82.1, ¯x 78.8).</p><p>Meristic characters: Holotype, paratypes plus additional eight specimens in parentheses D12 (12–14); A16 (15–17); P14 (12–15); AO 6 (6–8) + 8 (6–8), total 14 (13–15); GR 4 (4–5) +1+9 (8–10), total 14 (13–15); LLO 35 (33–36).</p><p>Body elongate, but deeper-bodied than most other Lampanyctus; head relatively large (~28% SL); body laterally compressed, particularly at caudal peduncle.</p><p>Premaxillaries and dentaries with closely set, villiform teeth; inner series of teeth at rear of premaxillaries and dentaries more regularly spaced and slightly larger. Series of 4–5 laterally compressed, anteriorly pointing teeth at rear of dentary. Minute teeth are present on the palatines, vomer heads and entire exposed ventral surface of the mesopterygoid.</p><p>Head length 3.5 (3.2–3.9, ¯x 3.4) in SL. Mouth large, oblique, upper jaw 1.4 (1.3–1.6, ¯x 1.4) in HL and 5.0 (4.3–5.9, ¯x 4.8) in standard length. Eyes large, diameter 2.4 (2.2–3.6, ¯x 2.9) in UJL and 3.4 (3.3–5.2, ¯x 3.9) in HL. Origin of dorsal fin behind base of pelvic fin; origin of anal fin under posterior 40% of dorsal fin. Pectoral fins moderately long, reaching anal-fin origin; pelvic fins extending to origin of anal fin. Origin of adipose fin slightly behind last anal-fin ray.</p><p>No photophores on cheek, no luminous gland at origin of adipose fin and no secondary photophores on head and trunk. Dn absent; Vn small. Op 1 below posterior end of jaw; Op 2 slightly above level of base of pectoral insertion and about above Op 1. PLO in advance of pectoral base, position highly variable from slightly above midway pectoral fin and lateral line to almost touching lateral line (PLO—pectoral fin/ PLO—lateral line ratio 1.2–5.6, ¯x =2.6). PLO position may in fact vary from one side of the fish to the other. PVO1 slightly behind PVO2 and below lower base of pectoral fin; line PVO 1 – PVO 2 passing anterior to PO 2; PVO 2 almost at upper pectoral base. Five PO, with PO 4 highly elevated to level between PVO 1 and PVO 2 and a little behind PO 3. VLO behind base of pelvic fins and approximately midway between lateral line and ventral base (VLO—pelvic-fin base/VLO—lateral line ratio 0.7–1.4, ¯x =1.0). Four VO, VO 2 sometimes raised but not anteriorly displaced. SAO series angulate; SAO 1 varies from slightly ahead of VO 3 to slightly behind, and is either level with or below SAO 2; line SAO 3 –SAO 2 passing through or slightly ahead of VO 4, with SAO 2 above anus and SAO 3 above origin of anal fin (and AOa 1) at lateral line. AOa series varies from level to moderately arched. Pol 1 behind last AOa, line Pol 2 –Pol 1 touches last AOa; Pol 2 at lateral line, well in front of adipose origin. No AOp above anal-fin base; AOp in contact with or less than one half photophore diameter away from infracaudal gland. Prc continuous with AOp; Prc 1–2 and Prc 2–3 spacings equal. Prc 2 below level of Prc 1, and Prc 4 slightly posterior to Prc 3 and at level of lateral line.</p><p>Supracaudal gland short, consisting of 3 overlapping scales; infracaudal gland longer, extending along entire caudal peduncle from procurrent caudal rays to last anal-fin ray, consisting of 7 or 8 overlapping scales. Infracaudal scales considerably enlarged, being as much as 3–4 AOp photophore diameters deep (Fig. 3).</p><p>Size: The largest specimen measured was 61.3 mm SL. Seven of the 40 specimens measured for this study were 50 mm SL or more, however all these fish are from waters east of New Zealand. Lampanyctus mendeleevi from the Tasman Sea and Australian waters do not appear to grow larger than 50 mm SL (J. Paxton pers. comm., 2011).</p><p>Distribution: Lampanyctus mendeleevi is widespread in waters north of the subtropical convergence in the Australasian region, from Western Australia, South Australia, Tasmania, Victoria, the Kermadec Is. and New Zealand. New Zealand material is found from off North Cape to the Puysegur Bank (Fig. 4). Probably more widespread but its small size means it is not often caught, or recognised as unique. Appears to undertake a diel migration; specimens taken at night were in 23–250 m depth whereas those during daylight hours were in 255–1000 m; the former probably caught in the ascending layer. One daytime winter catch in 100 m was taken probably in the descending layer.</p><p>Etymology: The species is named after the Soviet Research Vessel Dmitri Mendeleev. This name was proposed by Basil Nafpaktitis, who first recognized it as a distinct taxon while working in New Zealand in the early 1980s.</p></div>	https://treatment.plazi.org/id/03FA881D4C02FFF742DFFB50A790FE16	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.		MagnoliaPress via Plazi	Clements, Kendall D.;Stewart, Andrew L.	Clements, Kendall D., Stewart, Andrew L. (2026): A new species of Lampanyctus (Myctophiformes: Myctophidae) from the western South Pacific Ocean. Zootaxa 5782 (2): 361-368, DOI: 10.11646/zootaxa.5782.2.7, URL: https://doi.org/10.11646/zootaxa.5782.2.7
