Runge F, Ndambi B, Thines M (2012) Which morpho-
logical characteristics are most influenced by the
host matrix in downy mildews? A case study in
Pseudoperonospora cubensis. PLoS One 7:e44863
Schnepf E, Deichgra ̈ber G, Drebes G (1977) Develop-
ment and ultrastructure of the marine, parasitic
oomcete, Lagenisma coscinodisci(Lagenidiales):
sexual reproduction. Can J Bot 56:1315–1325
Schnepf E, Deichgra ̈ber G, Drebes G (1978a) Develop-
ment and ultrastructure of the marine, parasitic
oomycete,Lagenisma coscinodisciDrebes (Lagen-
idiales). The infection. Arch Microbiol 116:133–139
Schnepf E, Deichgra ̈ber G, Drebes G (1978b) Develop-
ment and ultrastructure of the marine parasitic
oomyceteLagenisma coscinodisciDrebes (Lagen-
idiales) Thallus, zoosporangium, mitosis and mei-
osis. Arch Microbiol 116:121–132
Schroeder KL, Martin FN, de Cock AWAM, Levesque
CA, Speis CDJ, Okubara PA, Paulitz TC (2012)
Molecular detection and quantification ofPythium
species—evolving taxonomy, new tools and chal-
lenges. Plant Dis 97:4–20
Schurko AM, Mendoza L, Le ́vesque CA, De ́saulniers
NL, de Cock AWAM, Klassen GR (2004) A molec-
ular phylogeny ofPythium insidiosum. Mycol Res
107:537–544
Seidl MF, den Ackerveken V, Govers F, Snel B (2012)
Reconstruction of oomycete genome evolution
identifies differences in evolutionary trajectories
leading to present-day large gene families.
Genome Biol Evol 4:199–211
Sekimoto S (2008) The taxonomy and phylogeny of the
marine holocarpic oomycetes.PhD Thesis, Gradu-
ate School of Natural Sciences, Konan University,
Kobe, Japan
Sekimoto S, Hatai K, Honda D (2007) Molecular phy-
logeny of an unidentifiedHaliphthoros-like marine
oomycete andHaliphthoros milfordensisinferred
from nuclear-encoded small and large subunit
rDNA genes and mitochondrial-encoded cox2
gene. Mycoscience 48:212–221
Sekimoto S, Beakes GW, Gachon CMM, Mu ̈ller DG,
Ku ̈pper FC, Honda D (2008a) The development,
ultrastructural cytology, and molecular phylogeny
of the basal oomycete Eurychasma dicksonii,
infecting the filamentous phaeophyte algaeEcto-
carpus siliculosusandPylaiella littoralis. Protist
159:401–412
Sekimoto S, Yokoo K, Kawamura Y, Honda D (2008b)
Taxonomy, molecular phylogeny, and ultrastruc-
tural morphology ofOlpidiopsis porphyraesp. nov.
(Oomycetes, stramenopiles), a unicellular obligate
endoparasite ofPorphyraspp. (Bangiales, Rhodo-
phyta). Mycol Res 112:361–374
Sekimoto S, Kochkova TA, West JA, Beakes GW, Honda
D (2009)Olpidiopsis bostrychiae: a new species
endoparasitic oomycete that infects Bostrychia
and other red algae. Phycologia 48:460–472
Shanor L, Olive LS (1943) Notes onAraiospora strep-
tandra. Mycologia 34:536–542
Sims PA, Mann DG, Medlin LK (2006) Evolution of the
diatoms: insights from fossil, biological and
molecular data. Phycologia 45:361–402
Soanes DM, Richards TA, Talbot NJ (2007) Insights
from sequencing fungal and oomycete genomes:
what can we learn about plant disease and the
evolution of pathogenicity. Plant Cell 19:3318–3326
Soylu EM, Soylu S, Keshavarzi M, Brown I, Mansfield
JW (2003) Ultrastructural characterization of the
interactions between Arabidopsis thalianaand
Albugo candida. Physiol Mol Plant Pathol
63:201–211
Sparrow FK (1934) Observations on marine phyco-
mycetes collected in Denmark. Dansk Bot Ark
8:1–24
Sparrow FK (1960) Aquatic phycomycetes, 2nd edn.
University of Michigan Press, Ann Arbor
Sparrow FK (1973) The peculiar marine phycomycete
Atkinsiella dubiafrom crab eggs. Arch Mikrobiol
93:137–144
Sparrow FK (1974) Observations on two uncommon
fungi. Veroff Inst Meeresf Bremerh Suppl 5:9–18
Sparrow FK (1973a) Mastigomycotina. In: Ainsworth
GC, Sparrow FK, Sussman AS (eds) The fungi, vol
4b. Academic, New York, pp 61–73
Sparrow FK (1973b) Chytridiomycetes. Hyphochytri-
diomycetes. In: Ainsworth GC, Sparrow FK, Suss-
man AS (eds) The fungi, vol 4b. Academic, New
York, pp 85–110
Sparrow FK (1973c) Lagenidiales. In: Ainsworth GC,
Sparrow FK, Sussman AS (eds) The fungi, vol 4b.
Academic, New York, pp 159–164
Sparrow FK (1976) The present status of classification
in biflagellate fungi. In: Gareth-Jones EB (ed)
Recent advances in aquatic mycology. Elek Sci-
ence, London, pp 213–222
Sparrow FK (1977)Rhizidiomycopsison azygospores of
Gigaspora margarita. Mycologia 69:1053–1058
Spencer MA, Vick MC, Dick MW (2002) Revision of
Aplanopsis, Pythiopsis, and ‘subcentric’ Achlya
species (Saprolegniaceae) using 18S rDNA and
morphological data. Mycol Res 106:549–560
Stassen JHM, Siedl MF, Vergeer PWJ, Nijman IJ, Snel B,
Cuppen E, Van den Ackerveken G (2011) Effector
identification in the downy mildewBremia lactu-
caeby massively parallel transcriptome sequenc-
ing. Mol Plant Pathol 13:719–731
Stidd BM, Consentino K (1975)Albugo-like oogonia
from the American carboniferous. Science
190:1092–1093
Strittmatter M, Gachon CMM, Kupper F (2009) Ecology
of lower oomycetes. In: Lamour K, Kamoun S
(eds) Oomycete genetics and genomics: diversity,
interactions and research tools. Wiley-Blackwell,
Ann Arbor, pp 25–46
Strullu-Derrien C, Kenrick P, Rioult JP, Strullu DG
(2010) Evidence of parasitic oomycetes (Peronos-
poromycetes) infecting the stem cortex oft eh Car-
boniferous seed fernLygniopteris odlhamia. Proc
R Soc B. doi:10.1098/rspb.2010.1603Systematics of the Straminipila: Labyrinthulomycota, Hyphochytriomycota, and Oomycota 95