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Ernst Haeckel
Ernst Heinrich Philipp August Haeckel (; ; 16 February 1834 – 9 August 1919) was a German zoologist, natural history, naturalist, eugenics, eugenicist, Philosophy, philosopher, physician, professor, marine biology, marine biologist and artist. He discovered, described and named thousands of new species, mapped a genealogical tree relating all life forms and coined many terms in biology, including ''ecology'', ''phylum'', ''phylogeny'', ontogeny, and ''Protista.'' Haeckel promoted and popularised Charles Darwin's work in Germany and developed the debunked but influential recapitulation theory ("ontogeny recapitulates phylogeny"), wrongly claiming that an individual organism's biological development, or ontogeny, parallels and summarizes its species' evolutionary development, or phylogeny, using incorrectly drawn images of human embryonic development. Whether they were intentionally falsified, or drawn poorly by accident is a matter of debate. The published artwork of Haeckel in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strobilation
Strobilation or transverse fission is a form of asexual reproduction consisting of the spontaneous transverse segmentation of the body. It is observed in certain cnidarians and helminths. This mode of reproduction is characterized by high offspring output, which, in the case of the parasitic tapeworms, is of great significance. Strobilation in cnidarians *The process starts with preliminary morphological changes. In particular, the cnidarian's tentacles tend to be reabsorbed. *Neck-formation: transverse constrictions appear near the upper extremity of the animal. A strobilating polyp is called a strobila while the non-strobilating polyp is called a scyphistoma or scyphopolyp. * Segmentation: the number of constriction sites increases and migrates down the body length, transforming the body into a sequence of disks. The fissures intensify until the initial body is divided into equally spaced, separate segments. The oral end of the polyp becomes the oral end of the ephyra. *Meta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stauromedusae
Stauromedusae are the stalked jellyfishes. They are the sole living members of the class Staurozoa and belong to the medusozoa subphylum of Cnidaria. They are unique among medusa jellyfish in that they do not have an alternation of polyp and medusa life cycle phases, but are instead interpreted as an attached medusa stage, with a lifestyle more resembling that of polypoid forms. They have a generally trumpet-shaped body, oriented upside-down in comparison with other jellyfish, with the tentacles projecting upwards, and the stalk located in the centre of the umbrella. Stauromedusae usually has eight marginal arms at the top of the calyx. They reach their adult sizes within several weeks, typically 1 to 4 centimeters in length. Members of this class are commonly found in relatively cold waters, close to the shoreline. However, there are a few known species that inhabit tropical and subtropical waters as referenced in the Stauromedusae article by Claudia E. Mills and Yayoi M. Hiran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lipkea
''Lipkea'' is a genus of stalked jellyfish. It is the only genus in the monotypic family Lipkeidae. ''Lipkea'' species lack tentacles at the end of their bell. Genera and Species According to the World Register of Marine Species, there are only three described species in this family and genus: *'' Lipkea ruspoliana'' Vogt, 1886 *'' Lipkea stephensoni'' Carlgren, 1933 *'' Lipkea sturdzi'' (Antipa, 1893) Distribution According to the World Register of Marine Species '' L. stephensoni'' is the only species known from the waters off the coast of South Africa. The other ''Lipkea'' species ('' Lipkea ruspoliana'' and '' Lipkea sturdzi'') are found in the mediterranean sea. It is likely that there are undescribed specimens of Lipkea. For instance the images in the gallery below show ''Lipkea'' with dense nematocyst A cnidocyte (also known as a cnidoblast) is a type of cell containing a large secretory organelle called a ''cnidocyst'', that can deliver a sting to other organisms a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lucernaria Quadricornis
''Lucernaria quadricornis'' is a species of stalked jellyfish in the family Lucernariidae Lucernariidae is a family of Stauromedusae, stalked jellyfish containing two genera. Species *Genus Lucernaria O. F. Müller, 1776 ** Lucernaria australis Vanhöffen, 1908 ** Lucernaria bathyphila Haeckel, 1880 ** Lucernaria haeckeli (Antipa, .... Habitat It is usually found in the subtidal zone, attached to algae or rocks, but it has been registered as deep as 550 meters Distribution This species is registered in the Arctic and the North Atlantic and North Pacific Ocean. It is known from the north and west coast of Norway, but not the British Isles References Lucernariidae {{medusozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Depastromorpha Africana
The stalked trumpet jelly (''Depastromorpha africana)'', is a species of stalked jellyfish in the family Depastridae. It is the only member of the genus ''Depastromorpha''. Description This small stalked jellyfish grows up to 2 cm in height and may be pale to reddish in colour. It has a wrinkled body column and multiple stalked tentacles with knobbed ends surrounding the mouth.Jones, Georgina. ''A field guide to the marine animals of the Cape Peninsula.'' SURG, Cape Town, 2008. Distribution This species has been found only around the South African coast from the Cape Peninsula to Hermanus from the shore to shallow subtidal. It is possibly endemic to this region. Ecology This stalked jelly is usually found on seaweeds, particularly ''Caulerpa filiformis ''Caulerpa filiformis'' is a species of seaweed in the ''Caulerpaceae'' family. It has been recorded at coastal sites in Australia and South Africa. References Caulerpa, filiformis Protists described in 1841 Chloroph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manania Handi
''Manania handi'' is a species of stalked jellyfish found in the Pacific Ocean along the west coast of North America. This species can be found in shallow waters at low tide on soft substrates such as seagrass ('' Phyllospadix''), but the related '' M. gwilliami'' have also been recovered at depths of >10 metres. This may reflect that intertidal specimens represent the fringes of a population that is typically more commonly found in the subtidal zone. Description ''Manania handi'' reaches a length of up to 4 cm, but the diameter of the bell at the oral end is relatively narrow at approximately 2 cm in fully-grown specimens. Distinctive pigment bands along the calyx and the relatively short stalk (or peduncle) distinguish it from related '' Manania'' species. ''Manania handi'' is also described typically as green with cream coloured gonads and vivid white nematocyst vesicles. However the colour patterns of M. handi can vary from brownish-yellow to vivid green. The nam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haliclystus Sanjuanensis
''Haliclystus sanjuanensis'' is a species of small (~4 cm) stalked jellyfish found in the Pacific Ocean along the west coast of North America. This species can be found in shallow waters at low tide on soft substrates such as seagrass ('' Phyllospadix''). A variety of colour morphs can be found ranging from yellow-green to red. ''Haliclystus sanjuanensis'' was formally described as a distinct species in 2023, following sequence data establishing it as a distinct taxon. Gallery Colour morphs of ''Haliclystus sanjuanensis'': File: Green subum.jpg , Green File: Grorange subum.jpg , Green-orange File: Orange exum 3.jpg , Orange File: Red exum.jpg , Red File: Inverted Hali stretched mesoglea maybe - buckling of flesh 2.tif , Juvenile ''H. sanjuanensis'' with peach colouring File: Peachy Haliclystus 7b.jpg , Juvenile ''H. sanjuanensis'' with peach colouring References Haliclystidae {{Staurozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haliclystus Octoradiatus
''Haliclystus octoradiatus'', common name spotted kaleidoscope jellyfish, is a stalked jellyfish in the family Lucernariidae. Description The bell of large specimens may be 25mm in diameter. However, specimens with a 10mm bell is far more commonly observed. The colour varies greatly. Specimens that appear quite opaque may be orange-brown, olive-brown, red, orange, or may appear locally green. Specimens that seem more translucent may appear brown and aqua, or almost white in colour. The morphology and colour of the calyx may differ greatly from specimen to specimen. The primary tentacles (anchors) may range in appearance from orbicular to suborbicular. The length of the calyx and stalk are approximately the same. There are 30 to 120 secondary tentacles arranged in clusters at the tip of the arms. Each conad contains 10 to 70 gonadal sacs. This species is commonly mis-recorded as '' Haliclystus auricula''. It was separated from this species in 1997. Although similar in appearanc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haliclystus Antarcticus
''Haliclystus antarcticus'' is a Stauromedusae, stalked jellyfish which lives on rocky shore lines in the Southern hemisphere. Description The original type specimens for this species have been lost. however the species was re-described in 2009. Individuals vary in colour from red-orange with light red gonads (individuals found at King George Island (Antarctica), King George Island, Antarctica) to red and/or green (individuals found in Valdivia, Chile). ''Haliclystus antarcticus'' has a 'stalk' (peduncle) which is a half to two thirds the length of its Calyx (anatomy), calyx. The inside of the peduncle is divided into four chambers. The calyx itself is about 3.5–16.2 mm tall and 4.1–23.4 mm wide. It is cone shaped and semi-translucent with a smooth outer surface. The animal has eight arms arranged in pairs which radiate out from a central four sided mouth. The arms are 0.3–6.0 mm in length. Each arm is tipped by clusters of up to roughly 200 tentacles wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jellyfish
Jellyfish, also known as sea jellies or simply jellies, are the #Life cycle, medusa-phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals, although a few are anchored to the seabed by stalks rather than being motile. They are made of an umbrella-shaped main body made of mesoglea, known as the ''bell'', and a collection of trailing tentacles on the underside. Via pulsating contractions, the bell can provide propulsion for animal locomotion, locomotion through open water. The tentacles are armed with cnidocyte, stinging cells and may be used to capture prey or to defend against predators. Jellyfish have a complex biological life cycle, life cycle, and the medusa is normally the sexual phase, which produces planula larvae. These then disperse widely and enter a sedentary #Life cycle, polyp phase which may include asexual budding before reaching sexual maturity. Jellyfish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kunstformen Der Natur
(known in English as ''Art Forms in Nature'') is a book of lithographic and halftone prints by German biologist Ernst Haeckel. Publication Originally published in sets of ten between 1899 and 1904 and collectively in two volumes in 1904, it consists of 100 prints of various organisms, many of which were first described by Haeckel himself. Over the course of his career, over 1000 prints were produced based on Haeckel's sketches and watercolors; many of the best of these were chosen for , translated from sketch to print by lithographer Adolf Giltsch. A second edition of , containing only 30 prints, was produced in 1914. Themes According to Haeckel scholar Olaf Breidbach, the work was "not just a book of illustrations but also the summation of his view of the world." The over-riding themes of the plates are symmetry and level of organization. The subjects were selected to embody these to the full, from the scale patterns of boxfishes to the spirals of ammonites to the pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
