On the origin and evolution of the lower Metazoa

On the origin of mitosing cells

1967 • 1,504 citations

New Concepts of Kingdoms of Organisms

1969 • 894 citations

Origin of Eukaryotic Cells.

1971 • 734 citations

The Invertebrates: Protozoa Through Ctenophora

1940 • 576 citations

The sulfide system: a new biotic community underneath the oxidized layer of marine sand bottoms

1970 • 531 citations

MICROTUBULES: EVIDENCE FOR 13 PROTOFILAMENTS

1973 • 468 citations

On the evolution of photoreceptors and eyes

1977 • 327 citations

A Multiple Origin for Plastids and Mitochondria

1970 • 292 citations

THE FORMATION OF BASAL BODIES (CENTRIOLES) IN THE RHESUS MONKEY OVIDUCT

1971 • 283 citations

Evolution of Photoreceptors

1965 • 276 citations

Principles of Comparative Anatomy of Invertebrates

1971 • 268 citations

The origin of nuclei and of eukaryotic cells

1975 • 266 citations

Plastids and Mitochondria: Inheritable Systems

1964 • 259 citations

Nematocysts

1974 • 228 citations

The Nonsymbiotic Origin of Mitochondria

1972 • 226 citations

Dynamics in Metazoan Evolution: The Origin of the Coelom and Segments.

1964 • 210 citations

CENTRIOLE MORPHOGENESIS IN DEVELOPING CILIATED EPITHELIUM OF THE MOUSE OVIDUCT

1971 • 193 citations

Monociliated epidermal cells in Gastrotricha: Significance for concepts of early metazoan evolution

2009 • 152 citations

The fine structure of the flagellate Mixotricha paradoxa and its associated micro-organisms

1964 • 148 citations

BASAL BODIES, BUT NOT CENTRIOLES, IN NAEGLERIA

1971 • 139 citations

NEW INVESTIGATIONS ON SYSTEMATICS AND EVOLUTION OF THE CLASS SCYPHOZOA AND THE PHYLUM CNIDARIA

1973 • 136 citations

Primitive Nervous Systems

1968 • 136 citations

Observations on the ultrastructure of the choanoflagellate Codosiga botrytis (Ehr.) saville-kent with special reference to the flagellar apparatus

1975 • 121 citations

Lehrbuch der Zoologie

1932 • 118 citations

PROTONEPHRIDIA

1974 • 116 citations

On the Occurrence and Structure of Choanocyte-like Cells in Some Echinoderms

1970 • 114 citations

DEVELOPMENTAL ANALYSIS OF SCYPHOMEDUSAE

1949 • 111 citations

Five-Kingdom Classification and the Origin and Evolution of Cells

1974 • 107 citations

PHYLOGENETIC RELATIONSHIPS OF THE PROCARYOTA AND THE ORIGIN OF THE EUCARYOTIC CELL

1969 • 105 citations

Lehrbuch der vergleichenden Entwicklungsgeschichte der Tiere

1970 • 103 citations

Die Acoela (Turbellaria) der Deutschen Nordseeküste und ein neues System der Ordnung

2009 • 97 citations

Evolutionary Criteria in Thallophytes: A Radical Alternative

1968 • 85 citations

Die Evolution der Organismen

1976 • 78 citations

Anaerobiosis, Meiofauna and Early Metazoan Evolution

1975 • 76 citations

Uniflagellate Spermatozoa in Nemertoderma (Turbellaria) and Their Phylogenetic Significanc

1975 • 76 citations

Die Nesselkapseln der Cnidaria, mit besonderer Berücksichtigung der Hydroida

1965 • 74 citations

On the development of metaphytes and metazoans

1973 • 70 citations

Die Nesselkapseln der Anthozoen und ihre Bedeutung für die phylogenetische Systematik

1972 • 68 citations

Collar cells in planula and adult tentacle ectoderm of the solitary coral Balanophyllia regia (anthozoa eupsammiidae)

1973 • 67 citations

The Life-History and Systematic Relations of the Mesozoa

1954 • 66 citations

Are/were mitochondria and chloroplasts microorganisms?

1970 • 65 citations

The evolution of the metazoa

1963 • 65 citations

On the Evolution of the Animal Phyla

1958 • 64 citations

Zur Problematik der Evolution der Coelomaten

1970 • 62 citations

Embryologische Studien an Medusen

1886 • 60 citations

Evolution of the prokaryotes

1971 • 59 citations

Bau und Lebensgeschichte des Polypen vonTripedalia cystophora (Cubozoa, class. nov., Carybdeidae) und seine Bedeutung für die Evolution der Cnidaria

1975 • 57 citations

The fine structure of myocytes in the sponges Microciona prolifera (Ellis and Solander) and Tedania ignis (Duchassaing and Michelotti)

1966 • 56 citations

Vergleichende Entwicklungsgeschichte der Tiere

1973 • 56 citations

An Attempt to Reconstruct the System of Animal Classification

1953 • 52 citations

The cellular organization ofConvoluta convoluta, an acoel turbellarian: A cytological, histochemical and fine structural study

1964 • 51 citations

Eibildung und furchung von Trichoplax adhaerens F. E. Schulze (Placozoa)

1972 • 49 citations

An Attempt to Reconstruct the System of Animal Classification

1953 • 47 citations

Studies in the development of Scyphomedusæ

1910 • 42 citations

Zwei neue Formen von Cyrtocyten. Vergleich der bisher bekannten Cyrtocyten und Er�rterung des Begriffes ?Zelltyp?

1962 • 42 citations

Morphogenese experimentale d'une eponge a partir de cellules de la larve nageante dissociee

1965 • 39 citations

WHITTAKER'S FIVE KINGDOMS OF ORGANISMS: MINOR REVISIONS SUGGESTED BY CONSIDERATIONS OF THE ORIGIN OF MITOSIS

1971 • 33 citations

Cytology, Homology and Phylogeny-A Note on "Organic Design"

1959 • 33 citations

Anthopleura stellula (Actiniaria, Actiniidae) and its reproduction by transverse fission

1970 • 33 citations

Eukaryotes versus Prokaryotes: An Estimate of Evolutionary Distance

1970 • 29 citations

Untersuchungen über die organisation und entwicklung der medusen, von Carl Claus ...

1883 • 28 citations

Hydroid generation and developmental history ofEucheilota maculata (Thecata — Leptomedusae). With a contribution to the methods of culturing marine hydroids

1968 • 28 citations

Growth and form in gymnoblastic hydroids. VI. Polymorphism within the hydractiniidae

1953 • 26 citations

On the Origin of the Eumetazoa

1958 • 26 citations

On the Origin of the Eumetazoa

1958 • 24 citations

PORIFERA

1974 • 24 citations

On the Origin and Phylogeny of the Coelenterates

1959 • 23 citations

Nematocysten vonChiropsalmus quadrumanus mit Anmerkungen zum systematischen Status der Cubomedusen

1975 • 21 citations

Zur Evolution des stomatogastrischen Nervensystems bei den Plathelminthen

2009 • 21 citations

PRESIDENTIAL ADDRESS: 28th May, 1959

1960 • 20 citations

The Kingdoms of Organisms

1971 • 19 citations

Skelettentwicklung, Ontogenie und Funktionsmorphologie rugoser Korallen

1975 • 19 citations

THE EARLY DEVELOPMENT OF A SOLENOGASTRE,EPIMENIA VERRUCOSA (NIERSTRASZ)

1940 • 18 citations

Ancestors, Embryos, and Symmetry

1959 • 18 citations

Zur Klärung des «Trochophora»-Begriffes

1973 • 17 citations

Studies on the autonomy of pellicular DNA in Paramecium

1969 • 15 citations

Die Geschichte des Archicoelomatenbegriffs und die Archicoelomatennatur der Pogonophoren

1972 • 12 citations

Feinstruktur und ontogenie der jung-präakambrischen petalo-organismen

1974 • 11 citations

A problematic organism from the Mazon Creek (Pennsylvanian) of Illinois

1973 • 9 citations

Mesoderm bei Ctenophoren

2009 • 9 citations

On the defecation apparatus in the genusArchimonocelis(turbellaria, monocelididae)

1966 • 7 citations

TUBULARIA REGENERATION: RADIAL ORGANIZATION OF TENTACLES, GONOPHORES, AND ENDODERM

1968 • 7 citations

On the Origin of the Metazoa

1953 • 5 citations

A Multiple Origin for Plastids and Mitochondria

1970 • 4 citations

Zum Problem der Metazoenabstammung

1969 • 4 citations

On Protospongia pedicellata, a new compound Infusorian

1884 • 3 citations

Deleted Work

1955 • 0 citations