My research interests primarily focus on the taxonomy and distribution of meiofauna and protozoa from the Gulf of Mexico, with an emphasis on kinorhynchs (mud dragons) and marine ciliates.


PUBLICATIONS- Stephen C. Landers

Frischer, M.E., Landers, S.C., Walker, A.N., Powell, S.A., Lee, R.F. 2022. Black gill in  marine decapod crustaceans- A review. Reviews in Fisheries Science & Aquaculture. 2022: 1-22.

Landers, S.C., Hoffman, K. P., Sánchez, N., Sørensen, M.V. 2022. Kinorhynch diversity in the southern Gulf of Mexico and a description of Dracoderes chaac sp. nov.  Gulf and Caribbean Research  33: 1-13.

Cepeda, D.,
Sánchez, N, Sørensen, M.V., Landers, S.C. 2022. Leiocanthus quinquenudus sp. nov. and L. satanicus sp. nov, two new species of pycnophyid Kinorhyncha (Allomalorhagida: Pycnophyidae) from the Gulf of Mexico. Zootaxa 5093: 315- 336.  

Hoffman, K.P.,
 Sánchez, N., Sørensen, M.V., Ingels, J., Landers, S.C. 2021. Kinorhynch communities of Mobile Bay and the Alabama Continental Shelf.  Cahiers de Biologie Marine 62: 371-380.

Landers, S.C., Bassham, R.D., Miller, J.M., Ingels, J., Sánchez,N., Sørensen, M.V. 2020. Kinorhynch communities from Alabama coastal waters. Marine Biology Research. 16: 494-504. 

Landers, S.C., Lee, R.F., Walters, T.L., Walker, A.N., Powell, S.A., Patel, M.K., Frischer, M.E.  2020. Hyalophysa lynni n. sp. (Ciliophora, Apostomatida), a new pathogenic ciliate and causative agent of shrimp black gill in penaeid shrimp.  European Journal of Protistology 73: 125673

Landers, S.C. 2020. Ciliophora. In: Schmidt-Rhaesa, A. (ed.): Guide to the identification of marine meiofauna. Pfeil-Verlag, Munich. pp 24-32. ISBN: 978-3-89937-244-1  

Bassham, R.D., Browning, J.S., Landers, S.C. 2020. The complete life cycle of the unusual apostome Hyalophysa clampi (Ciliophora, Apostomatida), a symbiont of crayfish in Alabama (USA). European Journal of Protistology 72: 125654     

Sørensen, M.V., Thistle, D., Landers, S.C. 2019. North American Condyloderes (Kinorhyncha: Cyclorhagida: Kentrorhagata): female dimorphism suggests moulting among adult Condyloderes.  Zoologischer Anzeiger 282: 232-251

Sánchez, N., Sørensen, M.V., Landers, S.C. 2019. Pycnophyidae (Kinorhyncha: Allomalorhagida) from the Gulf of Mexico: Fujuriphyes viserioni sp. nov. and a redescription of Leiocanthus langi (Higgins, 1964), with notes on its intraspecific variation. Marine Biodiversity 49: 1857-1875

Lee, R.F., Walker, A.N.,
Landers, S.C., Walters, T.L., Powell, S.A., Frischer, M.E. 2019.  Black spot gill syndrome in the Northern Shrimp, Pandalus borealis, caused by the parasitic ciliate Synophrya sp.  J. Invert. Pathol. 161: 40-46.

Landers, S.C.,
Sørensen, M.V., Sánchez, N., Beaton, K.R., Miller, J.M., Ingels, J. 2019.  Kinorhynch communities on the Louisiana continental shelf. Proceedings of the Biological Society of Washington. 132: 1-14.

Landers, S. C., Sørensen, M.V. 2018.  Echinoderes sylviae n. sp. (Kinorhyncha, Cyclorhagida), from the Gulf of Mexico, with comparative notes on a similar species Echinoderes spinifurca.  Bulletin of Marine Science 94: 1499-1514.

Bhattacharya, P., Landers, S.C., Park, J-W. 2018. Bacterial communities on the northern Gulf of Mexico continental shelf are influenced by sediment characteristics affected by the Mississippi River. Gulf of Mexico Science 34:63-72.
Beaton, K.R., Sharma, J., Jones, C.M., Miller, J.M., Stewart, P.M., Landers, S.C. 2018.  Nematode assemblages in the Gulf of Mexico continental shelf collected during a two-year survey.  J. Exp. Mar. Biol. Ecol.  502: 71-80.

Landers, S.C., Sørensen, M.V., Beaton, K.R., Jones, C.M., Miller, J.M., Stewart, P.M. 2018.  Kinorhynch assemblages in the Gulf of Mexico continental shelf collected during a two-year survey.  J. Exp. Mar. Biol. Ecol. 502: 81-90.

Sørensen, M.V. and Landers, S.C.  2018.  New species of Semnoderidae (Kinorhyncha: Cyclorhagida: Kentrorhagata) from the Gulf of Mexico. Marine Biodiversity 48: 327-355.

Frischer, M.E., Lee, R.F., Price, A.R., Walters, T.L., Bassette, M.A., Verdiyev, R., Torris, M.C., Bulski, K., Geer, P.J., Powell, S.A., Walker, A.N., Landers, S.C. 2017. Causes, diagnostics, and distribution of an ongoing penaeid shrimp black gill epidemic in the South Atlantic Bight, USA.  J. Shellfish Res. 36: 1-14.

Sørensen, M.V. and Landers, S.C.  2017. Description of a new kinorhynch species, Paracentrophyes sanchezae n. sp. (Kinorhyncha: Allomalorhagida) from the Gulf of Mexico, with differential notes on one additional, yet undescribed species in the genus.  Zootaxa 4242(1): 61-76.

Landers, S.C. and Sørensen, M.V.  2016. Two new species of Echinoderes (Kinorhyncha: Cyclorhagida), E. romanoi sp. n. and E. joyceae sp. n, from the Gulf of Mexico. ZooKeys 594: 51-71. doi:10.3897/zookeys.594.8623

Sørensen, M.V., Herranz, M. and Landers, S.C.  2016. A new species of Echinoderes (Kinorhyncha: Cyclorhagida) from the Gulf of Mexico, with a redescription of Echinoderes bookhouti Higgins, 1964. Zoologischer Anzeiger 265: 48-68. doi:10.1016/j.jcz.2016.04.004

Jones, C.M., Sharma, J., Miller, J.M., Stewart, P.M. and Landers, S.C.  2016. Nematode assemblages of the northern Gulf of Mexico continental shelf.  Proceedings of the Biological Society of Washington. 129: 24-37. doi: 10.2988/0006-324X-129.Q1.24

Sørensen, M.V. and Landers, S.C.  2015. Corrigendum: Two new species of Echinoderes (Kinorhyncha: Cyclorhagida) from the Gulf of Mexico.  Frontiers in  Marine Science 2:43.

Landers, S.C., Nichols, A.C., Schimmer, C.A. Stewart, P.M., Ramroop, S., Steffy, D.A. and Romano, F.A. III.  2014. Meiofauna and trace metals from sediment collections in Florida following the Deepwater Horizon oil spill.  Gulf of Mexico Science 32: 1-10.

Martinec, C. C., Miller, J.M., Barron, N.K., Tao, R., Yu, K., Stewart, P.M., Nichols, A.C., Steffy, D.A. and Landers, S.C. 2014.  Sediment chemistry and meiofauna from the northern Gulf of Mexico continental shelf.  International Journal of Oceanography

Schimmer, C. A. and Landers, S.C. 2014. Histochemical Study of the Progenetic Trematode Alloglossidium renale.  Journal of Parasitology Research, Article ID 245769, 8 pages.

Landers, S.C., Nichols, A.C., Barron, N.K., Schimmer, C.A., Tao, R., Yu, K., Stewart, P.M. and Ólaffson, E.  2014.  Nematode and copepod diversity (2012) from Louisiana near the Deepwater Horizon spill site.  Proceedings of the Biological Society of Washington 127(1): 47-57.

Sørensen, M.V. and Landers, S.C.  2014. Two new species of Echinoderes (Kinorhyncha: Cyclorhagida) from the Gulf of Mexico.  Frontiers in  Marine Science 1:8. doi:

Landers, S.C., Perry, M.E. and Jones, R.N. 2013.  Colonization of artificial substrates at Dauphin Island, Alabama: a comparison of Balanus sp. (Cirripedia), Membranipora tenuis (Bryozoa), and Conopeum tenuissimum (Bryozoa) settlement in 1999-2000 and 2010-2012. Gulf of Mexico Science  31: 1-9.

Landers, S.C., Romano, F.A. III, Stewart, P.M. and Ramroop, S. 2012. A multi-year survey of meiofaunal abundance from the northern Gulf of Mexico continental shelf and slope.  Gulf of Mexico Science 30(1-2):20-29.

Browning, J.S., and Landers, S.C. 2012. Exuviotrophic apostome ciliates from freshwater decapods in southern Alabama (USA) and a description of Hyalophysa clampi n.sp. (Ciliophora, Apostomatida).  European Journal of Protistology  48: 207-214.

Landers, S.C. 2010/2011. The fine structure of the tropho-tomont of the parasitic apostome Chromidina (Ciliophora, Apostomatida).  Protistology 6:271-279. (PDF available at web site)

Landers, S.C.  2011.  Improving TEM fixation with additives.  Microscopy Today 19(1): 40-42.

Landers, S.C.  2010.  The fine structure of the hypertrophont of the parasitic apostome Synophrya (Ciliophora, Apostomatida).  European Journal of Protistology  46:171-179.

Landers, S.C.  2010.  The fine structure of the developing oocyst of Pterospora floridiensis (Apicomplexa, Urosporidae).  European Journal of Protistology  46:1-9. ABSTRACT.

Landers, S.C. and Jones, R.D. 2009.  Pathology of the trematode Alloglossidium renale in the freshwater grass shrimp Palaemonetes kadiakensisSoutheastern Naturalist 8: 599-608. ABSTRACT.

Pisani, K.A., Landers, S.C. and Pappanastos, E. 2008. Salinity tolerance in Hyalophysa chattoni (Ciliophora, Apostomatida), a symbiont of the estuarine grass shrimp Palaemonetes pugioEuropean Journal of Protistology 44: 141-148.

Landers, S.C
., Gómez-Gutiérrez, J. and Peterson, W.T.  2007. The fine structure of the phoront of Gymnodinioides pacifica, a ciliated protozoan (Ciliophora, Apostomatida) from euphausiids of the Northeastern Pacific. European Journal of Protistology 43: 239-249. ABSTRACT

Landers, S.C.
2007.  Symbiotic and attached ciliated protozoans.  In: Carlton, J.T. (Ed.), The Light and Smith Manual: Intertidal Invertebrates from Central California to Oregon, 4th ed. pp. 70-80.

Landers, S.C., Gómez-Gutiérrez, J. and Peterson, W.T.  2006.  Gymnodinioides pacifica, n. sp., an exuviotrophic ciliated protozoan (Ciliophora, Apostomatida) from euphausiids of the Northeastern Pacific.  European Journal of Protistology 42: 97-106. ABSTRACT.

Leander, B.S., Lloyd, S.A.J., Marshall, W. and Landers, S.C.  2006.  Phylogeny of Marine Gregarines (Apicomplexa)- Pterospora, Lithocystis, and Lankesteria- and the Origin(s) of Coelomic Parasitism. Protist 157: 45-60. 

Landers, S.C.
, and Leander, B.S. 2005. Comparative Surface Morphology of Marine Coelomic Gregarines (Apicomplexa, Urosporidae): Pterospora floridiensis and Pterospora schizosomaJournal of Eukaryotic Microbiology  52(1): 23-30. ABSTRACT.

Landers, S.C.  2004.  Exuviotrophic Apostome Ciliates from Crustaceans of St. Andrew Bay, Florida, and a Description of Gymnodinioides kozloffi n. sp.  Journal of Eukaryotic Microbiology  51(6): 644-650. ABSTRACT.

Landers, S.C
and Phipps, S.W. 2003.  Settlement of the acorn barnacle Balanus from Mobile Bay and Weeks Bay, Alabama.  Gulf of Mexico Science  21: 186-191.
Landers, S.C and Phipps, S.W.  2003. Ciliated protozoan  colonization of substrates from Weeks Bay, Alabama.  Gulf of Mexico Science 21: 79-85.
Landers, S.C.  2002.  The fine structure of  the gamont  of  Pterospora floridiensis (Apicomplexa: Eugregarinida).   Journal of Eukaryotic Microbiology 49: 220-226.  ABSTRACT.

Beech, C.D. and Landers, S.C.  2002.  Ciliated protozoan colonization of substrates from Dauphin Island, Alabama.  European Journal of Protistology 38: 83-89. 
Landers, S.C., Treadaway, R.A., Johnson, J.W., Luckie, R.N. 2001. Food  plaquette digestion in the ciliated protozoan Hyalophysa chattoni. Invertebrate Biology 120:97-103.
Landers, S.C.  2001.   Pterospora floridiensis , a new species of acephaline gregarine (Apicomplexa) from the maldanid polychaete Axiothella  mucosa  in St. Andrew Bay, Florida.  Systematic Parasitology   48 :55-59.  ABSTRACT 

Landers, S.C.  2000.  Light and electron microscopic examination  of the parasitic dinoflagellate Haplozoon. Microscopy and Microanalysis   6 (suppl. 2): 884-885.
Landers, S.C.  1999.  Ultrastructural analysis of  the aseptate  gregarine Pterospora, a parasite of the bamboo worm  Axiothella  mucosa . Microscopy and Microanalysis   5 (suppl. 2): 1274-1275.

Landers, S.C. Zimlich, M.A., Coate, T.  1999.  Variations  in the ventral ciliature of the crustacean symbiont  Hyalophysa (CiliophoraApostomatida) from Mobile   Bay and Dauphin Island,  Alabama.Gulf  Research Reports 11:57-63. ABSTRACT

Landers, S.C., Treadaway, R.A. 1998. Analysis of endocytosis and food plaquette formation in the ciliated protozoan Hyalophysa. Microscopy and Microanalysis 4 (suppl. 2): 1152-1153.

Landers, S.C.  1997.  Morphogenesis in Hyalophysa  chattoni  (Ciliophora: Apostomatida): reduction of oral polykineties  in the encysted  phoront. Archiv fur Protistenkunde  148: 389-397.

Landers, S.C., Confusione, A., and Defee, D.  1996.   Hyalophysa  bradburyae, sp. n., a new species of apostome ciliate from the grass shrimp  Palaemonetes kadiakensis . European Journal of Protistology   32: 372-379.

Shih, JCH, Kelemen, DW, Landers, SC.  1995.  Culture characterization  and viral infection of aortic smooth muscle cells from japanese quail susceptible  to atherosclerosis.  Experimental and Molecular Patholology 61: 191-202.

Landers, S.C., Gupta, M., Lewis, J.C.  1994.  Ultrastructural localization  of tissue factor on monocyte-derived macrophages and macrophage foam cells  associated with atherosclerotic lesions.  Virchows Archiv   425(1): 49-54.

Lewis, J.C., Gupta, M., Landers, S.C., Hantgan, R.R.,  Jones, N.L.  1993.  Glycoprotein IIb/IIIa cross-reacting antigen in monocyte-derived macrophages  from the pigeon.  Experimental and Molecular Pathology   59: 95-110.

Landers, S.C. & Lewis, J.C.  1993.  acLDL binding and endocytosis  by macrophages and macrophage foam cells in situ.  Experimental and Molecular  Pathology   59: 38-50.

Landers, S.C., Jones, N.L., Williams, A.S., Lewis, J.C.1993.  B very  low density lipoprotein and clathrin-coated vesicles colocalize to microvilli on pigeon monocyte-derived  macrophages. American Journal of Pathology   142(5): 1668-1677 .

Jones, N.L., Landers, S.C., Allen, N.S.,  Lewis, J.C. 1992.   The dynamics of lipoprotein binding and endocytosis in macrophages:  a correlative ultrastructural  and light microscopic approach. EMSA  Proceedings  50: 574-575.
Landers, S.C. 1991.  Secretion of the reproductive cyst wall by the apostome ciliate Hyalophysa chattoni . European Journal of Protistology 27: 160-167.

Landers, S.C. 1991. Trichocyst digestion in Hyalophysa chattoni   (Ciliophora, Apostomatida). Transactions of the American Microscopical  Society  110: 118-127.

Landers, S.C. 1991. The fine structure of secretion in Hyalophysa  chattoni: formation of the attachment peduncle and the chitinous phoretic cyst wall.  Journal of Protozoology . 38: 148-157.

Landers, S.C. 1991. Pterospora demodendrion sp. nov. and Pterospora clymenellae, acephaline eugregarines from coastal  North Carolina. European Journal of Protistology   27 : 55-59.

Landers, S.C. 1986.  Studies of the phoront of Hyalophysa chattoni  (Ciliophora, Apostomatida) encysted on Grass Shrimp.  Journal of Protozoology 33: 546-552.

Landers, S.C., Gunderson, J. 1986.  Pterospora schizosoma , a new species of aseptate gregarine from the coelom of Axiothella  rubrocincta  (Polychaeta, Maldanidae).  Journal of Protozoology. 33 : 297-300 .

Landers Home