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Subphylum of chordates
The lancelets (/ˈlænslɪt, ˈlɑːn-/ LA(H)N-slit), also known as amphioxi (sing.: amphioxus /ˌæmfiˈɒksəs/ AM-fee-OK-səs), consist of 32 described species
Lancelet
Species of lancelet
Branchiostoma japonicum, the Japanese lancelet, is a species of lancelet within the family Branchiostomatidae. The species grows to lengths of 50 to 60
Branchiostoma_japonicum
Species of lancelet
Branchiostoma lanceolatum, the European lancelet or Mediterranean amphioxus is a lancelet in the subphylum Cephalochordata. It is a marine invertebrate
Branchiostoma_lanceolatum
1982 novel by Marion Zimmer Bradley
Lancelet visits Avalon, Morgaine falls in love with him, but her happiness is cut short when they discover Gwenhwyfar lost in the mist and Lancelet is
The_Mists_of_Avalon
Species of lancelet
mud lancelet, is a lancelet of the genus Branchiostoma endemic to the Gulf of Mexico, where it is found in the northern part. Like other lancelets in the
Branchiostoma_bennetti
Flexible rod-shaped structure in all chordates
animals it can facilitate tail motion when swimming. In cephalochordates (lancelets), the notochord persists throughout life as the main structural support
Notochord
Phylum of animals having a dorsal nerve cord
retain the synapomorphies during their larval stage; and Cephalochordata (lancelets), which resemble jawless fish but have no gills or a distinct head. The
Chordate
Species of lancelet
Branchiostoma floridae, the Florida lancelet, is a lancelet of the genus Branchiostoma. The genome of this species has been sequenced, revealing that
Branchiostoma_floridae
Brain and spinal cord
brain, though precursor structures exist in onychophorans, gastropods and lancelets. The rest of this article exclusively discusses the vertebrate central
Central_nervous_system
Species of lancelet
Branchiostoma belcheri, also known as the Belcher's lancelet, is a species of lancelet from the genus Branchiostoma. B. belcheri have a notochord, dorsal
Branchiostoma_belcheri
Species of lancelets
Asymmetron lucayanum is a species of lancelet that is native to the Atlantic and Indo-west pacific oceans. It is a benthic species lives in the tropical
Asymmetron_lucayanum
Gill-bearing non-tetrapod aquatic vertebrates
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Fish
Species of lancelet
lancelet, is a species of lancelet that is native to reducing habitats of the Northwest Pacific Ocean of Japan. A. inferum is unique among lancelets for
Asymmetron_inferum
Genus of lancelets
Branchiostoma is one of the few living genera of lancelets (order Amphioxiformes). It is the type genus of family Branchiostomatidae. These small vaguely
Branchiostoma
Clade of animals comprising vertebrates and tunicates
respiratory and sensory functions, in contrast with cephalochordates such as the lancelet which lack a respiratory system and specialized sense organs. The long-standing
Olfactores
Extinct genus of primitive chordates
specimens have been recovered. The body structure resembles that of the lancelet and it swam perhaps much like an eel. A notochord and myomeres (segmented
Pikaia
Rhynchonellata Gymnolaemata Phylactolaemata Stenolaemata Sagittoidea Leptocardii (lancelet) Appendicularia (larvaceans) Ascidiacea (sea squirts, paraphyletic with
List_of_animal_classes
Animals that feed by straining food from water
clams, scallops and oysters), echinoderms (sea lilies) and chordates (lancelets, sea squirts and salps, as well as many marine vertebrates such as most
Filter_feeder
Species of lancelet
Branchiostoma africae is a species of lancelets, a subphylum of chordates. Branchiostoma africae is a marine lancelet, living in coastal waters, buried in
Branchiostoma_africae
Type of chromosome
Important comparisons were made using the genomic organization of the Florida lancelet – part of a sister group to all vertebrates – suggests that the ancestral
Microchromosome
Species of lancelet
Epigonichthys hectori is a species of lancelet in the family Branchiostomatidae. The species is the only known lancelet species found in New Zealand, rarely
Epigonichthys_hectori
Topics referred to by the same term
LG Lancet, a Windows smartphone ZALA Lancet, a Russian military drone Lancelet, an animal Lancetfish, an animal Lance (disambiguation) This disambiguation
Lancet
Cellular process of loss of specialization
amputation, lancelet tails healed and formed a blastema structure, suggesting dedifferentiation of cells to prepare for regeneration. Lancelets can regenerate
Dedifferentiation
Protein that exhibits bright green fluorescence when exposed to ultraviolet light
other organisms including corals, sea anemones, zoanithids, copepods and lancelets. The GFP from A. victoria has a major excitation peak at a wavelength
Green_fluorescent_protein
Genus of lacelets
Asymmetron is one of the few living genera of lancelets (order Amphioxiformes). Asymmetron can grow to 60 mm. The species of this genus are found in world
Asymmetron
Lancelet Branchiostoma lanceolatum
List_of_chordate_orders
Subphylum of chordates
Chordata Cephalochordata Leptocardii (lancelets) Olfactores Tunicata (sea squirts, etc) Vertebrata
Vertebrate
Protected and endangered lancelet species of China Order Family Scientific name Common name Chinese name Protection class in China IUCN Red List CITES
List of endangered and protected species of China
List_of_endangered_and_protected_species_of_China
Extinct genus of chordates
description it was considered to be a cephalochordate (also known as a lancelet), though some other authors have considered its placement in the group
Palaeobranchiostoma
describing various physiological structures in some crustaceans, insects and lancelets. "Hepatic" refers to the liver, and the hepatic caecum may perform some
Hepatic_caecum
2004 book on evolution by Richard Dawkins & Yan Wong
three new tales. The third is reprinted in the second edition. From the lancelets onward, the authors provide dates under duress stating that "dating becomes
The_Ancestor's_Tale
Extinct group of animals that lived between 485 and 538 million years ago
years ago. The first Cambrian chordate discovered is Pikaia gracilens, a lancelet-like animal from the Burgess Shale in British Columbia, Canada. The discoverer
Cambrian_chordates
Arthurian legend character
the story. In Marion Zimmer Bradley's novel The Mists of Avalon (1982), Lancelet is another name of Galahad, and an estranged son of the Lady of the Lake
Lancelot
Extinct genus of chordates
suggested that the genus is a cephalochordate and closely related to living lancelets, other authors have disputed this due to the poor preservation of the
Cathaymyrus
Cephalic part of an animal
maxillac. Though invertebrate chordates – such as the tunicate larvae or the lancelets – have heads, there has been a question of how the vertebrate head, characterized
Head
Subclass of fishes
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Elasmobranchii
Marine animals without a vertebral column
including the non-vertebrate members of the phylum Chordata such as lancelets, sea squirts and salps. As the name suggests, marine invertebrates lack
Marine_invertebrates
Superphylum of bilateral animals
Superphylum Deuterostomia Phylum Chordata Subphylum Cephalochordata (lancelets) Clade Olfactores Subphylum Tunicata (tunicates) Subphylum Vertebrata
Deuterostome
Basal animal clade as a sister group of the Porifera
Anthozoans inc. corals Medusozoans inc. jellyfish Myxozoans Chordates Lancelets Tunicates Vertebrates Echinoderms Sea lilies Asterozoans inc. starfish
Eumetazoa
Signaling proteins released by host cells in response to the presence of pathogens
and lancelet, it was found that interferons arose by a duplication of interleukin 10 in a chordate ancestor to the vertebrates and the lancelets. By the
Interferon
Endocrine gland in the neck
closest living relatives of vertebrates, the tunicates and amphioxi (lancelets), have a structure very similar to that of larval lampreys (the endostyle)
Thyroid
Genus of lancelets
Epigonichthys is a genus of lancelets belonging to the family Branchiostomatidae. The genus was first described in 1876 by Wilhelm Peters. The type species
Epigonichthys
Endocrine gland in the brain of most vertebrates
lamprey (another primitive vertebrate), however, does possess one. The lancelet Branchiostoma lanceolatum, an early chordate which is a close relative
Pineal_gland
Anatomical structure in lancelets
In the lancelet, Hatschek's pit, not to be confused with Hatschek's nephridium, is a deep ciliated fossa on the dorsal midline of the buccal cavity (the
Hatschek's_pit
Origin and diversification of fish through geologic time
(6): e219. doi:10.1371/journal.pbio.0030219. PMC 1149496. PMID 15941356. Lancelet (amphioxus) genome and the origin of vertebrates Archived 2016-03-04 at
Evolution_of_fish
Infraphylum of vertebrates
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Gnathostomata
Evolutionary trend
brain protected by a skull of bone or cartilage. Cephalochordates like the lancelet (Amphioxus), a small fishlike animal with very little cephalization, are
Cephalization
Extinct genus of jawless fishes
serially arranged gonads — which is considered a basal trait shared with the lancelets. Haikouichthys was likely an active swimmer which lived in bright, shallow
Haikouichthys
Extinct genus of soft-bodied sea animals
eyes, which is not the case in any other vertebrate, although is seen in lancelets. Even if the structure was a notochord, the presence of notochords is
Tullimonstrum
Clade of lobe-finned fish
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Sarcopterygii
Class of ray-finned bony fishes
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Actinopterygii
Organisms that live in salt water
the tunicates (salps and sea squirts) and the cephalochordates (such as lancelets). Invertebrate chordates are close relatives to vertebrates. In particular
Marine_life
Protein-coding gene in Homo sapiens
has been studied in amphioxi, also known as lancelets. A T-box-containing cDNA was isolated in the lancelet Branchiostoma belcheri and found to possess
TBR1
Protein family
discovered in B. belcheri (Chinese lancelet) and Psectrotarsia flava (a moth). The terminal inverted repeats (TIR) in lancelet ProtoRAG have a heptamer-spacer-nonamer
Recombination-activating_gene
Three membranes protecting the brain
Giuseppe Sterzi described comparative studies on the meninges from the lancelet to the human. He showed that the spinal meninges were very simple in adult
Meninges
known as Lancelets. These organisms are in the kingdom Animalia, the phylum Chordata, the class Leptocardii, and the order Amphioxiformes. Lancelets are classified
Buccal_cirri
Organic vessel in which an embryo first begins to develop
are found in flatworms, roundworms, annelids, bivalves, echinoderms, the lancelet and in most marine arthropods. In anatomically simple animals, such as
Egg
Cartilaginous fish in the order Chimaeriformes
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Chimaera
Type of elongated, flagellated cells
in the excretory systems of their host organism(s). For example, the lancelets, also referred to as amphioxus (genus Branchiostoma), utilize solenocytic
Solenocyte
Portion of the cranium that is derived from pharyngeal arches
living deuterostomes; they are present in modern hemichordates and lancelets. In lancelets, numerou gill slits are present; they are used for filter feeding
Splanchnocranium
Diverse clade of vertebrate animals
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Osteichthyes
Class of lobe-finned fishes
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Coelacanth
Paraphyletic infraphylum of fish
represent a stage which precedes the evolution of the vertebral column (as do lancelets). The original scheme groups hagfish and lampreys together as cyclostomes
Agnatha
Animals without a vertebral column
(Echinodermata) Acorn worms, cephalodiscids and graptolites (Hemichordata) Lancelets (Amphioxiformes) Salps, pyrosomes, doliolids, larvaceans and sea squirts
Invertebrate
genes ("ProtoRAG"; PDB: 6B40) has been discovered in B. belcheri (Chinese lancelet). The TIRs are structurally similar to Recombination signal sequences (RSS)
Transib
Sheet of internal skeletal muscle
widely among the chordates. Thus the model organism, the marine chordate lancelet, possesses an atriopore by which water exits the pharynx, which has been
Thoracic_diaphragm
Marine animals, subphylum of chordates
craniates (including hagfish, lampreys, and jawed vertebrates) than to lancelets, echinoderms, hemichordates, Xenoturbella or other invertebrates. The
Tunicate
Class of jawed cartilaginous fish
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Chondrichthyes
length (excluding the tail).[citation needed] The largest lancelet is the European lancelet (Branchiostoma lanceolatum) "primitive fish". It can grow
Largest_and_heaviest_animals
Family of fishes
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Snailfish
Bony skin-covered spines or rays protruding from the body of a fish
the first fishes and the cyclostomes, and a more primitive precursor in lancelets) (C) - Homocercal where the fin usually appears superficially symmetric
Fish_fin
Study of the form or morphology of fishes
but not expanded (as in cyclostomatans, the ancestral vertebrates and lancelets). Diphycercal: vertebrae extend to the tip of the tail; the tail is symmetrical
Fish_anatomy
Extinct phylum of animals
this. Displacement of left-right axis is known in bilaterians, notably lancelets. The body is completely segmented, with all isomers curved towards the
Proarticulata
Extinct agnathan chordates resembling eels
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Conodont
Cambrian fossil chordate
yet no systemic heart has been preserved in any Yunnanozoon fossil. Lancelets, which also have no systemic heart, rely on contractions of the aorta
Yunnanozoon
Enzyme involved in estrogen production
an early-diverging chordate, the cephalochordate amphioxus (the Florida lancelet, Branchiostoma floridae), but not in the earlier diverging tunicate Ciona
Aromatase
Superclass of jawless fishes
used for filter feeding that is otherwise found only in tunicates and lancelets. During metamorphosis, the lamprey endostyle develops into the thyroid
Cyclostomi
Species of fish
Dorosoma, is a reflection of the fact that, when young, the fish has a lancelet-shaped body (doro meaning lanceolate and soma meaning body). The specific
American_gizzard_shad
Excretory organ similar to vertebrate kidney
found in the phyla Platyhelminthes, Nemertea, Rotifera and Chordata (lancelets). They have the same anatomy as the metanephridia but with the internal
Nephridium
Extinct family of jawless fishes
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Pituriaspida
Internal support structure of an animal
optimize contractile speed. In the more basal subphylum Cephalochordata (lancelets), the endoskeleton solely consists of a single notochord. Alternating
Endoskeleton
Extinct class of jawless fishes
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Cephalaspidomorphi
related invertebrates) 530 Mya Olfactores Excludes cephalochordates (Lancelets) Subphylum Vertebrata Fish / Vertebrates 505 Mya Infraphylum Gnathostomata
Timeline_of_human_evolution
Division or infraclass of fishes
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Teleost
Organ found in some chordates
endostyle is an organ found in invertebrate chordate species of tunicates and lancelets, and in the larval stage of vertebrate lampreys. It assists in filter-feeding
Endostyle
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
List of prehistoric cartilaginous fish genera
List_of_prehistoric_cartilaginous_fish_genera
Extinct paraphyletic class of fishes
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Placoderm
Amino acid derivative
N-methyl substituent and D-configuration — found across Chordates from lancelets to mammals. At homeostatic levels NMDA plays an essential role as a neurotransmitter
N-Methyl-D-aspartic_acid
Extinct genus of jawless fishes
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Drepanaspis
Animal living mostly or entirely in water
sedentary filter feeders (e.g. bivalve molluscs, brachiopods, acorn worms, lancelets) and ambush predators (e.g. flatfishes and bobbit worms, who often burrow
Aquatic_animal
Paleopolyploidy in early vertebrates
in lancelets and tunicates, contradicting a prediction of Ohno's hypothesis that genome duplication occurred in the common ancestor of lancelets and
2R_hypothesis
Extinct paraphyletic class of fishes
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Acanthodii
Genus of gastropods
from parasitic trematodes, both attached to its skin and inside its body. Lancelet Péron & Lesueur C. A. (1810). "Histoire de la famille des Mollusques Ptéropodes
Phylliroe
Group of cytochrome P450 enzymes
are only 37.5-38.8% identical, and the CYP11D and E genes seen in modern lancelet (Branchiostoma floridae, an ancient branch of chordate animals) is 39%
CYP11_family
Regions of the pancreas
are absent in any invertebrate and primitive chordates (tunicates and lancelets). During the evolution of vertebrates, the cell types secreting peptides
Pancreatic_islets
Extinct order of cartilaginous fish
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Iniopterygiformes
Class of jawless fish
invertebrate subphyla Tunicata (sea-squirts) and the fish-like Cephalochordata (lancelets or Amphioxus). Recent molecular and morphological phylogenetic studies
Lamprey
Extinct order of fishes
evolution Forerunners Basal member †Pikaia Cephalochordate †Cathaymyrus Lancelet Olfactores †Haikouella Tunicate †Myllokunmingiidae? (†Haikouichthys, †Myllokunmingia)
Palaeoniscoid
Study of the evolution of the chordate clade
clarified by chordate genomics. Chordate genomics demonstrates that the Lancelets are the most basal living clade within the chordates, while the Tunicates
Chordate_genomics
Top of the head
(2019-07-01). "Evolution and development of the cartilaginous skull: From a lancelet towards a human face". Seminars in Cell & Developmental Biology. 91: 2–12
Crown_(anatomy)
LANCELET
LANCELET
LANCELET
LANCELET
Girl/Female
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sindhi, Tamil, Telugu
Successful; Winner; Beautiful; Famous; Glorious
Boy/Male
Hindu, Indian
Who has Compassion
Girl/Female
Tamil
Beauty, Splendor
Boy/Male
Muslim
Reward, Compensation
Boy/Male
English American Latin Hebrew
Right-hand son.
Boy/Male
British, English
Son of Otto
Boy/Male
Hindu
Prosperous, Brother of Rama, Born to give (Queen Sumitra's son and Rama's brother)
Boy/Male
Hindu
Lord Krishna
Surname or Lastname
English
English : habitational name from any of the various places, for example in Derbyshire, County Durham, Gloucestershire, Staffordshire, Wiltshire, and West Yorkshire, so named from Old English stÄn ‘stone’ + lÄ“ah ‘wood’, ‘clearing’.Americanized form of any of various like-sounding names in other European languages, for example Polish Stanislawski and Greek Anastasiou.The explorer and journalist Sir Henry Morton Stanley (1841–1904) was born John Rowlands in Denbigh, Wales, but traveled as a cabin boy in 1858 from Liverpool, England, to New Orleans, LA, where he was adopted by a merchant surnamed Stanley. From the late 1860s he worked as a correspondent for the New York Herald, and traveled extensively in Africa.
Girl/Female
Hindu, Indian, Tamil
Lord Vinayaka
LANCELET
LANCELET
LANCELET
LANCELET
LANCELET
n.
The lancelet. See Amphioxus.
n.
A fishlike creature (Amphioxus lanceolatus), two or three inches long, found in temperature seas; -- also called the lancelet. Its body is pointed at both ends. It is the lowest and most generalized of the vertebrates, having neither brain, skull, vertebrae, nor red blood. It forms the type of the group Acrania, Leptocardia, etc.
n.
A small fishlike animal (Amphioxus lanceolatus), remarkable for the rudimentary condition of its organs. It is the type of the class Leptocardia. See Amphioxus, Leptocardia.