Biografia Fu docente presso l'Università di Copenaghen, oltre che curatore delle collezioni del locale museo zoologico.
Si è contraddistinto per svariate ricerche e pubblicazioni riguardanti soprattutto la tassonomia e la morfologia dei lepidotteri più primitivi, tra cui le famiglie Micropterigidae e Agathiphagidae. A lui si deve l'attribuzione dello status di superfamiglia al genere Agathiphaga, descritto precedentemente da Dumbleton nel 1952.
Taxa descritti
Pubblicazioni (elenco parziale)
Gibbs, GW & Kristensen, NP 2011,Agrionympha, the long-known South African jaw moths: a revision with descriptions of new species (Lepidoptera, Micropterigidae), Zootaxa , vol 2764, pp. 1-21. Djernæs, M & Kristensen, NP 2011, Derived morphology in a basal moth: The uniquely specialized sternum V glands of Agathiphaga., Arthropod Structure & Development , vol 40, pp. 559-569. Rota, J & Kristensen, NP 2011, Notes on taxonomic history, thoraco-abdominal articulation, and current placement of Miilieriidae (Insecta: Lepidoptera), Zootaxa , vol 3032, pp. 65-68. Hünefeld, F & Kristensen, NP 2010,The female postabdomen and internal genitalia of the basal moth genus Agathiphaga (Insecta: Lepidoptera: Agathiphagidae): Morphology and phylogenetic implications, Zoological Journal of the Linnean Society , vol 159, pp. 905-920. Kristensen, NP & Gaedike, R 2010, Extraordinary moths and an extraordinary moth researcher: An essay review of Gaden. S. Robinson's Biology, distribution and diversity of tineid moths, Nota Lepidopterologica , vol 33, pp. 3-8. Lees, DC, Rougerie, R, Zeller-Lukaschort, C & Kristensen, NP 2010,DNA mini-barcodes in taxonomic assignment: a morphologically unique new homoneurous moth clade from the Indian Himalayas described in Micropterix (Lepidoptera, Micropterigidae), Zoologica Scripta, vol 39, pp. 642-661. Kaaber, S , Kristensen, NP & Simonsen, TJ 2009, Sexual dimorphism and geographical male polymorphism in the ghost moth Hepialus humuli (Lepidoptera: Hepialidae): Scale ultrastructure and evolutionary aspects, European Journal of Entomology , vol 106, pp. 303-313. Kristensen, NP 2008, Early Lepidoptera evolution., Gesellschaft für Biologische Systematik Newsletter , vol 20, pp. 50-55.
Faucheux, MJ , Kristensen, NP & Yen, S 2006,The antennae of neopseustid moths: Morphology and phylogenetic implications, with special reference to the sensilla (Insecta, Lepidoptera, Neopseustidae), Zoologischer Anzeiger , no. 245, pp. 131-142. Krenn, HW & Kristensen, NP 2004, Evolution of proboscis musculature in Lepidoptera, European Journal of Entomology , no. 10, pp. 565-575. Kristensen, NP & Simonsen, TJ 2003, Scale length/wing length correlation in Lepidoptera, Journal of Natural History , no. 37, pp. 673-679. Karsholt, O & Kristensen, NP 2003, Plesiozela , gen. nov. from temperate South America: apparent sister-group of the previously known Heliozelidae (Lepidoptera: Incurvarioidea: Heliozelidae), Invertebrate Systematics , no. 17, pp. 39-46. Kristensen, NP 2003, Reproductive organs, Lepidoptera:Moths and butterflies 2.Handbuch der Zoologie/Handbook of Zoology IV/36 pp. 427-447. Akai, H, Hakim, RS & Kristensen, NP 2003, Labial glands, silk and saliva, Lepidoptera: Moths and butterflies 2. Handbuch der Zoologie/Handbook of Zoology IV/36 pp. 377-388. Warrant, E, Kelber, A & Kristensen, NP 2003, Visual organs, Lepidoptera: Moths and butterflies 2.Handbuch der Zoologie/Handbook of Zoology IV/36 pp. 325-359. Barbehenn, RV & Kristensen, NP 2003, Digestive and excretory system, Lepidoptera: Moths and butterflies 2. Handbuch der Zoologie/Handbuch of Zoology IV/36 pp. 165-187. Hasenfuss, I & Kristensen, NP 2003, Skeleton and muscles: immatures, Lepidoptera: Moths and butterflies 2. Handbuch der Zoologie/Handbook of Zoology IV/36 pp. 133-164. Kristensen, NP 2003, Skeleton and muscles: adults, Lepidoptera: Moths and butterflies 2. Handbuch der Zoologie/Handbook of Zoology IV/36 pp. 39-131. Kristensen, NP & Simonsen, TJ 2003,'Hairs' and scales, Lepidoptera: Moths and butterflies2. Handbuch der Zoologie/Handbook of Zoology IV/36 pp. 9-22. Chauvin, G & Kristensen, NP 2003, Integument, Lepidoptera: Moths and butterflies 2. Handbook der Zoologie/Handbook of Zoology IV/36 pp. 1-8. Klass, K, Zompro, O , Kristensen, NP & Adis, J 2002, Mantophasmatodea: a new insect order with extant members in the Afrotropics, Science , no. 206, pp. 1456-1459. Klass, K & Kristensen, NP 2001,The ground plan and affinities of hexapods: recent progress and open problems, Ann. Soc. ent. France , no. 37, pp. 265-298. Simonsen, TJ & Kristensen, NP 2001,Agathiphaga wing vestiture revisited: evidence for complex early evolution of lepidopteran scales (Lepidoptera:Agathiphagidae), Insect Syst. Evol. , no. 32, pp. 169-175. Krenn, HW & Kristensen, NP 2000, Early evolution of the proboscis of Lepidoptera (Insecta): external morphology of the galea in basal glossatan moth lineages, with remarks on the origin of the pilifers, Zoologisher Anzeiger , no. 239, pp. 179-196. Kristensen, NP 1999, Phylogeny of endopterygote insects, the most successful lineage of living organisms, Eur. J. Entomol. , no. 96, pp. 237-254. Carter, D & Kristensen, NP 1998, Classification and keys to higher taxa. Lepidoptera: Moths and Butterflies 1, Handbuch der Zoologie/Handbook of Zoology IV , no. 35, pp. 27-40. Kristensen, NP 1998, Historical Account. Lepidoptera: Moths and butterflies 1, Handbuch der Zoologie/Handbook of Zoology IV , no. 35, pp. 1-5. Kristensen, NP 1998,The non-glossatan moths. Lepidoptera: Moths and butterflies 1, Handbuch der Zoologie/Handbook of Zoology IV , no. 35, pp. 41-49. Kristensen, NP & Skalski, A 1998, Palaeontology and phylogeny. Lepidoptera: Moths and butterflies 1, Handbuch der Zoologie/Handbook of Zoology IV , no. 35, pp. 7-25. Kristensen, NP 1998,The homoneurous Glossata. Moths and butterflies 1, Handbuch der Zoologie/Handbook of Zoology IV , no. 35, pp. 51-63. Gentili, P, Horak, M , Kristensen, NP & Nielsen, E 1998,The Cossoidea and Sesioidea. Moths and buterflies 1, Handbuch der Zoologie/Handbook of Zoology IV , no. 35, pp. 181-197. Dugdale, J , Kristensen, NP , Robinson, G & Scoble, M 1998,The Yponomeutoidea. Lepidoptera: Moth and butterflies 1, Handbook der Zoologie/Handbook of Zoology IV , no. 35, pp. 119-130. Dugdale, J , Kristensen, NP , Robinson, G & Scoble, M 1998,The smaller microlepidoptera-grade superfamilies: Lepidoptera: Moths and butterflies 1, Handbook der Zoologie/Handbook of Zoology IV , no. 35, pp. 217-232. Kristensen, NP & Nielsen, E 1998,Heterobathmia valvifer n.sp.: A moth with large apparent "ovipositor valves" (Lepidoptera, Heterobathmiidae), Steenstrupia , no. 24, pp. 141-156. Kristensen, NP 1997, Early evolution of the Trichoptera + Lepidoptera lineage: phylogeny and the ecological scenario, Mémoires du Muséum d´histoire Naturelle , no. 173, pp. 253-271. Kristensen, NP 1997,The ground plan and basal diversification of the hexapods, Arthropod Relationships Chapman, London, pp. 281-293.
Kristensen, NP , Karsholt, O, Davis, DR & Nielsen, E 1995,A revision of the genus Ogygioses (Lepidoptera: Palaeosetidae), Invertebrate Systematics , no. 9, pp. 1231-1263. Kristensen, NP 1995, Forty years insect phylogenetic systematics. Hennig's "Kritische Bemerkungen..." and subsequent developments, Zool. Beitr. N.F. , no. 36, pp. 83-124. Kristensen, NP & Nielsen, ES 1994,Osrhoes coronta Druce, the New World palaeosetid moth: A reappraisal, with description of a new type of female genital apparatus (Lepidoptera, Exoporia), Insect Systematics and Evolution , no. 24, pp. 391-406. Kristensen, NP , Karsholt, O & Kozlov, MV 1994,Eriocrania cicatricella (Zetterstedt, 1839) the correct name of the moth currently known as Eriocrania haworthi Bradley, 1966 (Lepidoptera: Eriocraniidae), Entomologiske Meddelelser , no. 62, pp. 91-93. Kristensen, NP , Melzer, RR & Paulus, HF 1994,The Larval Eye of Nannochoristid Scorpionflies (Insecta, Mecoptera), Acta Zoologica , no. 75, pp. 201-208. Kristensen, NP 1992, Biodiversity in a Changing World, Naturens Verden , no. 11-12, pp. 420-421. Kristensen, NP 1991, Morphology of the lowest Lepidoptera - Glossata: Recent progress and unforeseen problems, Bull. Sugadaira Montane Res.Cen. , no. 11, pp. 105-106. Kristensen, NP 1991,The trunk integument of zeuglopteran larvae: One of the most aberrant arthropod cuticles known (Insecta, Lepidoptera), Bull. Sugadaira Montane Res.Cen. , no. 11, pp. 101-102. Kristensen, NP 1991, Phylogeny of extant hexapods, The Insects of Australia Melbourne University Publishing, Melbourne, pp. 126-140.
Kristensen, N.P. 1990: The trunk integument of zeuglopteran larvae: One of the most aberrant arthropod cuticles known (Insecta, Lepidoptera). Bull. Sugadaira Montane Res. Cen. 11: 101-102 Nielsen, E.S. & Kristensen, N.P. 1989: Primitive Ghost Moths. Monogr. Aust. Lepid. 1, 206 pp. Kristensen, N.P. 1989: Insect phylogeny based on morphological evidence. Pp 295-306 in Fernholm, B.et al. (eds): The Hierarchy of Life. Molecules and Morphology in Phylogenetic Analysis. Amsterdam: Elsevier. Kristensen, N.P. 1989: The New Zealand scorpionfly (Nannochorista philpotti comb.n.): wing morphology and its phylogenetic significance. Z. zool. Syst. Evolut.-forsch. 27: 106-114. Kristensen, N.P. 1985: Sommerfuglenes storsystematik/The higher classification of Lepidoptera. Pp. 6-20 in Schnack, K. (red./ed.) Katalog over de danske sommerfugle/Catalogue of the Lepidoptera of Denmark. - Ent. Meddr. 52. Kristensen, N.P. 1984: Studies on the morphology and systematics of primitive Lepidoptera. Steenstrupia 10: 141-191. Kristensen, N.P. 1984: The male genitalia of Agathiphaga (Lepidoptera, Agathiphagidae) and the lepidopteran ground plan. Ent. scand. 15. Kristensen, N.P. 1984: The larval head of Agathiphaga (Lepidoptera Agathiphagidae) and the lepidopteran ground plan. Syst. ent. 9: 63-81. Kristensen, N.P. 1984: The pregenital abdomen of the Zeugloptera (Lepidoptera). Steenstrupia 10: 113-136. Kristensen, N.P. 1984: Respiratory system of the primitive moth Micropterix calthella (Linnaeus) Lepidoptera: Micropterigidae). Int. J. Insect. Morph. Embryol. 13: 137-156. Kristensen, N.P. 1984: Skeletomusc ular anatomy of the male genitalia of Epimartyria (Lepidoptera: Micropterigidae). Ent. scand. 15: 97-112.
Henriksen, H.J. & Kristensen, N.P. 1982: Dagsommerfuglen Colias alfacariensis, en nyopdaget strejfgæst i Danmark (Lepidoptera: Pieridae). Ent. Meddr. 49: 123-131. Kristensen, N.P. 1982: Splitting or widening: remarks on the taxonomic treatment of paraphyletic taxa. Ann. Zool. Fennici 19: 201-202. Kristensen, N.P. & Nielsen, E.S. 1981: Double-tube proboscis configuration in neopseustid moths (Lepidoptera: Neopseustidae). Int. J. Insect Morph. Embryol. 10: 483-486. Kristensen, N.P. & Nielsen, E.S. 1981: Intrinsic proboscis musculature in nonditrysian Lepidoptera-Glossata: Structure and phylogenetic significance. Pp. 299-304 in Cederholm, L. (ed.): Advances in insect systematics and phylogeny. Ent. scand. Suppl. 15: 299-304. Kristensen, N.P. & Nielsen, E.S. 1981: Abdominal nerve cord configuration in adult non-ditrysian Lepidoptera. Int. J. Insect Morph. Embryol. 10: 89-91. Kristensen, N.P. 1981: Phylogeny of insect orders. A. Rev. Ent. 26: 135-157. Kristensen, N.P. 1981: Amphiesmenoptera. Trichoptera. Lepidoptera. [Revisionary notes] Pp. 325-330, 412-415 in Hennig, W.: Insect Phylogeny (Pont & Schlee eds). Chichester, New York, Brisbane, Toronto: John Wiley & Sons. Kristensen, N.P. 1980: Sphinx andrenaeformis Laspeyres, 1801 (Insecta, Lepidoptera): Proposed conservation. Z.N.(S) 2139. Bull. zool. Nomenclat. 37: 156-15. Kristensen, N.P. 1980: Sphinx tipuliformis Clerck, 1759 (Insecta, Lepidoptera): Proposed conservation. Z.N.(S) 2138. Bull. zool. Nomenclat. 37: 154-156.