Janssen HH (in prep) Light collecting and light conducting structures in marine invertebrate taxa harbouring symbiotic microalgae

 

Janssen HH (in prep) Gastropods associated with echinoderms (Eulimidae: Mesogastropoda: Prosbranchia) — lines in evolution

 

Janssen HH, Vandenspiegel D (2001) Archaster typicus Müller and Troschel 1840 (Phanerozonia, Valvata, Archasteridae) — an extremely unusual seastar. Greifswalder Geowiss Beitr 9:20–22

 

Janssen HH (1999) Symbiotic gastropods and bivalves from Philippine shallow waters — new findings and a review. Philipp Sci 36:86–129

 

Janssen HH, Gradinger R (1998) Turbellaria (Archoophora: Acoela) from Antarctic sea ice endofauna — examination of their micromorphology. Polar Biol 21:410–416

 

Czaker R, Janssen HH (1998) Outer extracellular matrix (ECM) in the dicyemid mesozoan Kantharella antarctica. J Submicrosc Cytol Pathol 30:349–353

 

Vandenspiegel D, Janssen HH, Jangoux M (1998) Ultrastructure of ciliated urns in Archaster typicus Müller and Troschel, 1840 (Asteroidea, Echinodermata). In: Mooi , Telford M (eds) Proc 9th Int Echinoderm Conf, San Francisco, CA, USA, 1996. Balkema, Rotterdam, p 312

 

Janssen HH (1997) Epizoic bacteria on the foot of the Antarctic bivalve Lissarca notorcadensis (Filibranchia Philobryidae). Polar Biol 17:437–447

 

Janssen HH (1996) A home-made sandwich platform improves the signal in Flameless Atomic Absorption Spectroscopy. Philipp Sci 32:38–45

 

Janssen HH, Vandenspiegel D (1996) Ciliated urns in Archaster typicus Müller and Troschel 1840 (Echinodermata, Asteroidea, Archasteridae) — present and future research. Philipp Sci 33:94–103

 

Janssen HH (1996) Ökosystemforschung Wattenmeer — Versuch einer kritischen Würdigung. 5th Sci Symp Ecosyst Res Wadden Sea, Oldenburg, 19– 21 Feb. 1996

 

Janssen HH, Oeschger R (1994) Hydrogen sulfide resistance in benthic invertebrates. Proc Symp 100 Years Biologische Anstalt Helgoland, 1992. Helgol Meeresunters 49:89–91

 

Gradinger R, Janssen HH, Weissenberger J (1994) Acoel turbellaria — a major component of sea ice meiofauna. Proc Symp 100 Years Biologische Anstalt Helgoland, 1992. Helgol Meeresunters 49:89–91

 

Brandt A, Janssen HH (1994) Redescription of Zonophryxus quinquedens Barnard, 1913 (Crustacea, Isopoda, Dajidae) from the Weddell Sea, Antarctica, with notes on its biology and zoogeography. Polar Biol 14:343–350

 

Janssen HH, Brandt A (1994) Heterocepon marginatum Shiino, 1936 (Crustacea: Isopoda: Epicaridea: Bopyridae), a new hyperparasite from the Philippines, and a short review of the biology of the Bopyridae. Philipp Sci 31:5–31

 

Brandt A, Janssen HH (1994) Zonophryxus quinquedens Barnard 1913 (Crustacea, Isopoda, Dajidae), a parasite of Nematocarcinus longirostris Bate, 1988 from the Weddell Sea, Antarctica. Verh Dtsch Zool Ges 87.1

 

Janssen HH, Hoese B (1993) Marsupium and brooding biology of the Antarctic giant isopod Glyptonotus antarcticus (Eigths) (Crustacea, Isopoda, Idotheidae). Polar Biol 13:145–149

 

Janssen HH (1993) Morphology, egg cocoons, and transmission paths of the Antarctic leech Glyptonotobdella antarctica Sawyer and White, 1969 (Hirudinea, Rhynchobdelliformes, Piscicolidae). Polar Biol 13:347–354

 

Janssen HH (1993) Brutpflege bei aquatischen Wirbellosen der Antarktis — Anpassung an einen besonderen Lebensraum? Mikrokosmos 82:181–187

 

Janssen HH, Oeschger R (1992) The body wall of Halicryptus spinulosus (Priapulida) — ultrastructure and changes induced by hydrogen sulfide. Hydrobiologia 230:219–230

 

Janssen HH, Möller H, von Landwüst C, Heeger T (1992) Pollution effect monitoring on the histological level using Dreissena polymorpha (Pallas) (Bivalvia, Dreissenidae). In: Neumann D, Jenner HA (eds) The zebra mussel Dreissena polymorpha — ecology, biological monitoring and first applications in the water quality management. Limnologie Aktuell, vol. 4, Fischer, Stuttgart, p 155–170

 

Janssen HH (1992) The peculiar morphology and ultrastructure of the heart shell, Corculum cardissa (Bivalvia, Cardiacea, Fraginae), a consequence of adaption to endosymbiotic zooxanthellae. Proc 10th Int Malacol Congr (Tübingen 1989), p 85–88

 

Janssen HH (1992) Metal transfer through the slug, Arion lusitanicus, with special emphasis to the intestinal tract. Proc 10th Int Malacol Congr (Tübingen 1989), p 205

 

Janssen HH (1992) Philippine bivalves and microorganisms: past research, present progress, and a perspective for aquaculture. Philipp Sci 29:5–32

 

Janssen HH, Oeschger R (1992) Schwefelwasserstoffbewältigung bei Muscheln. Verh Dtsch Zool Ges 85.1:2391

 

Janssen HH, Dallinger R (1991) Diversification of Cd-binding proteins due to different levels of contamination in Arion lusitanicus (Arionidae, Gastropoda). Arch Environ Contam Toxicol 20:132–137

 

Oeschger R, Janssen HH (1991) Histological studies on Halicryptus spinulosus with regard to iron and environmental hydrogen sulfide resistance. Hydrobiologia 222:1–12

 

Janssen HH (1991) Sipunculids from the reef off Mactan Island (Visayas, central Philippines). Philipp Sci 27:11–18

 

Janssen HH (1991) Surprising findings on the sea star Archaster typicus. Philipp Sci 28:89–98

 

Janssen HH (1991) Ecohistological studies on Antarctic benthic invertebrates. In: Bathmann U. et al. (eds) The expeditions ANTARCTIS IX/1-4 of RV Polarstern in 1990/1991. Ber Polarforsch 100:204–206

 

Scharek R, Fahl K, Janssen HH, Grossmann S (1991) Experiments with natural algal populations from water and sea ice. In: Bathmann U. et al. (eds) The expeditions ANTARCTIS IX/1-4 of RV Polarstern in 1990/1991. Ber Polarforsch 100:204–206

 

Janssen HH, Oeschger R (1991) Ultrastrukturelle Veränderungen in der Körperwand von Halicryptus spinulosus (Priapulida) nach H2S-Inkubation. Verh Dtsch Zool Ges 84:516

 

Janssen HH (1991) Die rätselhaften Augen der antarktischen Lissarca notorcadensis. Mikrokosmos 80:109-112

 

Oeschger R, Janssen HH (1991) Zur Histochemie von Halicryptus spinulosus. Verh Dtsch Zool Ges 83:604

 

Janssen HH (1990) Öko-histologische Untersuchungen an Lissarca notorcadensis. Verh Dtsch Zool Ges 83:60

 

Janssen HH (1989) Heavy metal analysis in earthworms from an abandoned mining area. Zool Anz 222:306–321

 

Hoese B, Janssen HH (1989) Morphological and physiological studies on the marsupium in terrestrial isopods. Proc 2nd Symp Biol Terrestrial Isopods, Urbino, Italy, 1986. Monit Zool Ital Monogr (NS) 4:153–157

 

Janssen HH (1989) Parasitische Schnecken von philippinischen Echinodermen. Verh Dtsch Zool Ges 82:243

 

Dallinger R, Janssen HH, Bauer-Hilty A, Berger B (1988) Characterization of an inducible cadmium-binding protein from hepato-pancreas of metal-exposed slugs (Arionidae, Mollusca). Comp Biochem Physiol 92C:335–360

 

Janssen HH, Holm J (1988) Parasitic gastropods from Philippine echinoderms. Philipp Sci 25:1–9

 

Janssen HH (1988) Corculum cardissa — symbionteninduzierte Co-evolution bei Herzmuscheln (Cardiacea Fraginae). Verh Dtsch Zool Ges 81:186

 

Bielefeld U, Janssen HH (1988) Die Ultrastruktur der embryonalen Kopfblase und Podocyte bei Deroceras reticulatum. Verh Dtsch Zool Ges 81:270

 

Janssen HH (1987) Vergleichende Untersuchungen zu Metalltransfer und Ultrastruktur der Mitteldarmdrüse verschiedener Schnecken. Habilitation thesis, University of Heidelberg

 

Janssen HH, Triebskorn R (1987) Comparative morphology of the radulae in Pomatias elegans and in Littorina littorea (Gastropoda, Taenioglossa). Zool Anz 219:73–82

 

Janssen HH (1987) Zur Biologie von Anadara maculosa (Taxodonta, Arcidae), einer wirtschaftlich wichtigen Meeresmuschel auf den Philippinen. Verh Dtsch Zool Ges 80:296

 

Bielefeld U, Janssen HH (1987) Untersuchungen zur Histogenese der Mitteldarmdrüse bei Deroceras reticulatum (Müller). Verh Dtsch Zool Ges 80:242

 

Janssen HH (1986) Some notes on Philippine Pinnotheridae (Crustacea, Brachiura). Philipp Sci 23:15–30

 

Janssen HH, Bielefeld U (1986) Zur Histophysiologie des Verdauungstraktes einheimischer Nacktschnecken. Verh Dtsch Zool Ges 79:388

 

Triebskorn R, Janssen HH (1986) Autoradiographische Untersuchungen von Resorptionsvorgängen an einheimischen Gastropoden. Verh Dtsch Zool Ges 79:396

 

Janssen HH (1985) Some histological findings on the mid-gut gland of the common garden snail, Arion rufus (L.) (syn. A. ater rufus (L.), A. empiricorum Ferrusac; Gastropoda, Stylommatophora). Zool Anz 215:33–51

 

Janssen HH (1985) Three epizoic gastropods from Malaysia and from the Philippines. Z Parasitenkd 71:553–560

 

Alberti G, Janssen HH (1985) On the fine structure of spermatozoa of Tachypleus gigas (Xiphosura, Merostomata). Int J Invertebr Reprod Dev 9:309–319

 

Schneider P, Hoese B, Janssen HH (1985) Comparative studies into the tracheal supply of the flight muscles in beetles (Coleoptera) — 1. Anatomical aspects about tracheae and tracheolae in some beetles. Zool J 113:113–143

 

Janssen HH, Triebskorn R (1985) Die Mitteldarmdrüse zweier abgeleiteter Landschnecken Pomatias elegans (Prosobranchia) und Arion rufus (Pulmonata). Verh Dtsch Zool Ges 78:312

 

Janssen HH, Queisser W (1985) Wider den Stachel. Mikrokosmos 74:129–135

 

Janssen HH (1985) Das Zwergmännchen von Mytilicola intestinalis. Mikrokosmos 74:367–369

 

Janssen HH (1984) Development and ultrastructure of spermatozoa of Archaster typicus Müll. and Trosch. 1840 (Echinodermata, Asteroidea). Int J Invertebr Reprod Dev 7:333–344

 

Janssen HH, Orosco C, Largo D, Ayson F, Uy W (1984) Some recent findings on the seastar, Archaster typicus Müller and Troschel 1840. Philipp Sci 21:51–74

 

Hoese B, Janssen HH (1984) Zur Feinstruktur des Kotyledonenepithels im Marsupium von Porcellio scaber (Isopoda, Oniscida). Verh Dtsch Zool Ges 77:294

 

Janssen HH (1984) Ein Krebs im Muscheldarm — Mytilicola intestinalis. Mikrokosmos 73:278–280

 

Janssen HH, Ertelt-Janssen U (1983) Cytochemical demonstration of cadmium and iron in experimental Mytilus edulis. Mikroskopie 40:329–340

 

Janssen HH (1983) Selbstherstellung von Formen zur Flacheinbettung elektronenmikroskopischer Präparate. Microsc Acta 87:39–40

 

Prosi F, Storch V, Janssen HH (1983) Small cells in the mid-gut glands of terrestrial isopoda — sites of heavy metal accumulation. Zoomorphology 102:53–64

 

Janssen HH (1983) Dünndarm-Zotten — Dickdarmkrypten. Mikrokosmos 72:24–26

 

Janssen HH (1983) Kleinterrarien für Arthropoden. Mikrokosmos 72:28

 

Janssen HH (1982) Eine billige und einfache Methode zur Kontrastierung elektronenmikroskopischer Ultradünnschnitte. Microsc Acta 85:295–296

 

Janssen HH, Queisser W (1982) Das Verhalten antidiarrhoisch wirkender Substanzen im Experiment. Microsc Acta 86:295–309

 

Janssen HH (1982) Histologische Untersuchungen zum Verhalten antidiarrhoisch wirkender Substanzen unter in vitro-Bedingungen. Microsc Acta 86:387–398

 

Storch V, Janssen HH, Cases E (1982) The effects of starvation on the hepatopancreas of the coconut crab, Birgus latro (L.) (Crustacea, Decapoda). Zool Anz 208:115–123

 

Janssen HH (1982) Ein Auge im Dunkeln. Mikrokosmos 71:275–277

 

Janssen HH (1982) Bakterien im Mäusedarm. Mikrokosmos 71:353–359

 

Janssen HH (1982) Variable Käfige für die Arthropodenhaltung. Mikrokosmos 71:382

 

Janssen HH, Dreyer HP (1981) A simple and cheap apparatus for the controlled feeding of suspension feeders. Mar Biol 62:313–315

 

Janssen HH, Möller H (1981) Effects of various feeding conditions on Anemonia sulcata. Zool Anz 106:161–170

 

Janssen HH (1981) Zur Enzymhistochemie und Ultrastruktur von Magen und Drüsenkanälen bei verschiedenen Muscheln. Zool Anz 207:25–53

 

Janssen HH (1981) Zur Enzymhistochemie der Mitteldarmdrüse bei verschiedenen Muscheln. Zool Anz 207:54–69

 

Janssen HH (1981) Zur Histologie der Mitteldarmdrüse von Mytilus edulis. I. Ultrastrukturelle Merkmale. Zool Jahrb Anat 106:289–322

 

Janssen HH (1981) Zur Histologie der Mitteldarmdrüse von Mytilus edulis. II. Veränderungen in der Tubulus-Feinstruktur. Zool Jahrb Anat 106:527–567

 

Janssen HH (1980) Licht- und elektronenmikroskopische Untersuchungen an der Mitteldarmdrüse von hunger- und futterkonditionierten Miesmuscheln (Mytilus edulis). PhD thesis, University of Kiel

 

Janssen HH, Scholz N (1979) Uptake and cellular distribution of cadmium in Mytilus edulis. Mar Biol 55:131–141