#Thecostraca

[snototter]

A group of pelagic gooseneck barnacles (Lepas anatifera) on the shore of Morrow Bay, California, USA

by marlin harms

[taxonomytournament]

Taxonomy Tournament: Crustaceans

Branchiopoda. This class is made up of fairy shrimp, clam shrimp, water fleas, and the shield shrimp. All members have gills on their apendages, including the mouthparts.

Thecostraca. This class is made up of barnacles, marine sessile filter feeders commonly found attached to boats, along with other genera that are parasites of echinoderms

[rattyexplores]

Volcano Barnacles

Towering monoliths of the tidepools, though only a few centimetres tall.

Tetraclita squamosa, “Green Volcano Barnacle”

15/06/22

[wildlandrover]

I was just there and got a video of these guys!

Let’s get cirri-ous: an acorn barnacle’s feathery phalanges are foolproof for filtering a feast from fast flows! These captivating crustaceans do a little headstand when they’re but wee plankton settling down, cementing their noggins to the seafloor before forming a shell around them. By flapping their feet in the current, those tiny toe hairs, called cirri, trap detritus and plankton as they pass by. Once a snack is secured, the barnacle pulls its legs inside, scrapes off its filtered fare and voila! Dinner is served!

[bestanimal]

Round 2 - Arthropoda - Thecostraca

(Sources - 1, 2, 3, 4)

Thecostraca is is a class of crustaceans, many of which have planktonic larvae which become sessile or parasitic as adults. The most well-known group are the Barnacles (subclass Cirripedia), but Thecostraca also includes the parasitic Ascothoracida, and the mysterious Facetotecta.

Facetotecta, comprising only the genus Hansenocaris, are known only from their larvae (image 3) and adults have yet to be recognized, though some scientists believe they may actually be larval tantulocaridans.

Ascothoracidans are parasites of echinoderms and cnidarians. Most genera are meso and endoparasitic (living inside the host) while some are ectoparasitic (living on the outside of the host). They are similar in anatomy to copepods, with six pairs of legs, an abdomen with four segments, a telson, and a bivalved carapace. They feed on their host via piercing and sucking mouthparts, and some more advanced species also absorb nutrients through the carapace. They are sexually dimorphic, in many cases so much so that the smaller males will live inside the larger female’s mantle cavity.

Barnacles (subclass Cirripedia) are more well-known than other Thecostracans. Adult barnacles are sessile filter feeders, except for the infraclass Rhizocephala, which are parasites of other crustaceans. Barnacles attach themselves to a surface as adults, be that a rock, the shell of a mollusc, a ship, or a large animal such as a whale. They come in two common forms: acorn barnacles which grow their shells directly on a surface (image 4) and goose barnacles which attach themselves via a stalk (image 1). Barnacles have a carapace made of six calcareous plates, with a lid made of four more plates. They attach themselves to the substrate by means of a cement gland at the base of their antennae. Eight pairs of thoracic limbs, called cirri, extend from the carapace to filter plankton from the water and bring it towards the mouth. The hairs on these limbs are very sensitive to touch, and help the barnacle sense the world around them. They also have three simple eyes (ocelli) which can sense changes in light, allowing them to close their plates quickly if a shadow is detected.

Thecostracans have nauplius larvae, characterised by a head with antennules, antennae, mandables, and a single eye, three pairs of limbs, a carapace, and a telson. Barnacle larvae are brooded by the parent until their first moult, after which they are released to swim freely using setae.

The oldest known thecostracan fossil is dated from the Middle Cambrian. Traces of the parasitic forms have been dated from the Cretaceous.

Propaganda under the cut:

Barnacles have the longest penis (relative to body size) of any living animal. You can see it in action in the above gif and in this video.

Most barnacles are not parasitic (other than hitching a ride) and usually do no harm to the large animals they attach to. An overload of barnacles tends to be a symptom of an underlying issue, such as the animal being unable to shed its skin. Non-professionals scraping or pulling barnacles off of whales and turtles often does more harm than good for the affected animal!

12th-18th Century Europeans thought that Brants and Barnacle Geese emerged, fully formed, from Goose Barnacles. Gerald of Wales claimed to have seen the birds hanging down from pieces of timber, William Turner accepted the theory, and John Gerard claimed to have seen the birds emerging from their shells. In County Kerry, until relatively recently, Catholics abstaining from meat during Lent could still eat this bird because it was considered a fish.

As filter-feeders, barnacles play an important role in the ecosystem: not only for transferring nutrients up the food chain, but also for keeping the water clean.

When a barnacle chooses its home, it produces a biological glue made of six different proteins. While the glue hardens, it accumulates limestone salts, turning into a concrete-like shell. Barnacle glue is six times stronger than any manmade glue. Scientists are trying to replicate this glue for use in the fields of engineering, construction and medicine, where it can be used as a biological sealant during or post-surgery.

[evoldir]

Fwd: Postdoc: GeorgeWashingtonU.BranacleSystematics

Begin forwarded message: > From: evoldir@evol.biology.mcmaster.ca > Subject: Postdoc: GeorgeWashingtonU.BranacleSystematics > Date: 4 September 2024 at 06:49:21 BST > To: rdmpage@gmail.com > > > > Postdoc in Barnacle Molecular Systematics at George Washington University > (GWU) > > About the Project > The Computational Biology Institute, at the Milken Institute School of > Public Health’s Department of Biostatistics and Bioinformatics, GWU, > is offering a Postdoc position to develop a comprehensive phylogeny of > the barnacles (Crustacea: Thecostraca) and study the evolution of sexual > systems.Barnacles rank among the most biologically diverse, ubiquitous and > ecologically important marine metazoans. They exhibit a fascinating and > unique range of sexual systems, including hermaphroditism (both sexes), > dioecy (separate sexes) and androdioecy (hermaphrodites and males).We want > to apply exon probes for targeted capture sequencing to ~1,200 barnacle > species to build a robust phylogeny of the Thecostraca. Then coupling this > barnacle tree with fossil, morphological and ecological information in > a comparative analysis framework, we will test long-standing theoretical > predictions about the evolution of sexual systems and its diversification > across broad spatial, temporal and ecological scales. > > About the Postdoc > > The postdoc candidate will conduct research in phylogenomics and > evolutionary biology of barnacles and work together with the PI (Pérez- > Losada), collaborators and graduate students. Responsibilities: > + Compilation, generation and curation of genomic and other >  (e.g., morphological and ecological) trait data for selected >  barnacle species. > + Bioinformatic analysis of genomic data to infer phylogenies and >  perform comparative analyses on traits to test hypotheses. > + Preparation and submission of manuscripts to scientific journals. > + Availability to travel to other institutions and work abroad for short >  periods of time. > + Training of graduate and undergraduate students in the lab on the above- >  mentioned duties. > + Delivering guest lectures or short workshops for relevant courses and >  related topics offered at GW in the disciplines involved in the >  research program. > > Qualifications > > PhD and expertise in molecular systematics, bioinformatics, comparative > phylogenetic methods, genomics and ideally barnacle taxonomy. > > Hiring Range > 61,008 - 65,000 > > Expected duration of appointment > Up to 3 years renewable every year upon performance > > Starting date > October 1, 2024 > > Healthcare Benefits > GWU offers a comprehensive benefit package for Postdoc Associates and > Scholars that includes medical, dental, vision, life & disability > insurance, time off & leave, well-being and various voluntary > benefits. Postdoc Scholars may also be eligible for retirement savings > and tuition programs. For program details and eligibility, please visit > https://ift.tt/gBUfdQr. > > Applicant Documents to Submit > Cover Letter > Curriculum Vitae > Statement of Research Interest > Two Letters of Recommendation > > Online Application > > All candidates must apply online via the following GWU link > https://ift.tt/WlhZPdC > > Contact > If you have further questions regarding this position you can email > Marcos Perez-Losada at mlosada@gwu.edu > > Marcos Perez-Losada, PhD > > Marcos Perez-Losada

[life-around-me-yura15cbx]

Epopella plicata is a species of symmetrical sessile barnacle in the family Tetraclitidae. It is found in New Zealand. On mid-tidal rocks.

Phylum: Arthropoda

Subphylum: Crustacea

Class: Thecostraca

Subclass: Cirripedia

Order: Balanomorpha

Family: Tetraclitidae

Genus: Epopella

Browns Bay, Auckland 0630

7QQ2+MPF Auckland

-36.7108220, 174.7518110

[bacony-cakes]

don't fucking challenge me i know every beast

NON-BEASTLY BEASTS:

Non-ParaHoxozoa:

Calcarea (Calcareous Sponges)

Hexacinellida (Glass Sponges)

Demospongiae (Demosponges)

Tentaculata (Tentacled Ctenophores)

Beroida (Non-Tentacled Ctenophores)

ParaHoxozoa, Non-Nephrozoa:

Placozoa

Anthozoa (Corals, Sea Pens, and Tube-Dwelling Anenomes)

Medusozoa (Jellyfish and Hydrozoans)

Myxozoa

Xenacoelomorpha

MINIBEASTS:

Spiralia, Non-Lophotrochozoa:

Gnathifera (Rotifers and Jaw Worms)

Mesozoa

Rouphozoa (Flatworms and Gastrotrichs)

Lophotrochozoa, Non-Mollusca:

Cycliophora

Annelida (Segmented Worms)

Nemertea (Ribbon Worms)

Bryozoa

Entoprocta

Phorodina (Horseshoe Worms)

Brachiopoda

Mollusca:

Solenogastres

Caudofoveata

Polyplacophora (Chitons)

Bivalvia (Clams, Scallops, Mussels, Oysters, Cockles, and others)

Monoplacophora

Scaphopoda (Tusk Shells)

Gastropoda (Snails, Slugs, Sea Snails, Sea Slugs, and others)

Cephalopoda (Nautiloids, Cuttlefish, Squid, and Octopi)

Ecdysozoa, Non-Arthropoda:

Loricifera

Priapulida (Penis Worms [sic])

Kinorhyncha (Mud Dragons)

Nematoda (Roundworms)

Nematomorpha (Horsehair Worms)

Tardigrada (Tardigrades)

Onchyophora (Velvet Worms)

Arthropoda, Non-Mandibulata:

Pycnogonida (Sea Spiders)

Xiphosura (Horseshoe Crabs)

Acariformes (Cheese Mites, Scabies Mites, Eyelash Mites, House Mites, and others)

Opiliones (Harvestmen)

Ricinulei (Hooded Tickspiders)

Solifugae (Camel Spiders)

Parisitiformes (Ticks, Varroa Mites, and others)

Pseudoscorpiones (Pseudoscorpions)

Scorpiones (Scorpions)

Araneae (Spiders)

Amblypigi (Whip Spiders)

Urgopygi (Whip Scorpions)

Mandibulata, Non-Insecta:

Chilopoda (Centipedes)

Symphyla (Pseudocentipedes)

Pauropoda

Diplopoda (Millipedes)

Ostracoda (Seed Shrimp)

Mystacocarida

Branchiura (Fish Lice)

Pentastomida (Tongue Worms)

Copepoda (Copepods)

Tantulocarida

Thecostraca (Barnacles and others)

Malacostraca (Crabs, Lobsters, Shrimp, Isopods, Amphipods, and others)

Cephalocarida (Horseshoe Shrimp)

Branchiopoda (Fairy Shrimp, Tadpole Shrimp, Water Fleas, and others)

Remipedia

Collembola (Springtails)

Protura

Diplura (Two-Pronged Bristletails)

Insecta, Non-Neoptera:

Archaeognatha (Jumping Bristletails)

Zygentoma (Silverfish, Firebrats, and others)

Odonatoptera (Dragonflies and Damselflies)

Ephemeroptera (Mayflies)

Neoptera, Non-Holometabola:

Zoraptera (Angel Insects)

Dermaptera (Earwigs)

Plecoptera (Stoneflies)

Orthoptera (Grasshoppers, Crickets, and others)

Mantodea (Mantises)

Blattodea (Cockroaches and Termites)

Notoptera (Ice Crawlers and Rock Crawlers)

Phasmatodea (Stick Insects and Leaf Insects)

Embioptera (Webspinners)

Psocodea (Lice)

Hemiptera (Shield Bugs, Aphids, Scale Insects, Cicadas, Planthoppers, Assassin Bugs, Water Boatmen, Pond Skaters, and others)

Thysanoptera (Thrips)

Holometabola

Hymenoptera (Sawflies, Bees, Wasps, and Ants)

Strepsiptera

Coleoptera (Beetles)

Raphidioptera (Snakeflies)

Neuroptera (Lacewings, Antlions, and others)

Megaloptera (Dobsonflies and others)

Lepidoptera (Butterflies and Moths)

Trichoptera (Caddisflies)

Diptera (Flies, Mosquitoes, Gnats, Midges, Hoverflies, and others)

Mecopteroidea (Scorpionflies, Hangingflies, and Fleas)

SLIGHTLY MORE BEASTLY BEASTS:

Ambulacraria:

Echinodermata (Starfish, Sea Urchins, Brittle Stars, Feather Stars, and others)

Hemichordata (Acorn Worms and others)

Chordata (Non-Vertebrata):

Leptocardii (Lancelets)

Tunicata (Sea Squirts, Salps, Pyrosomes, and others)

Vertebrata (Non-Eutelostomi):

Myxini (Hagfish)

Hyperoartia (Lampreys)

Elasmobranchii (Sharks, Rays, and Skates)

Holocephali (Chimaeras)

Actinopterygii (Non-Acanthomorpha):

Cladistia (Bichirs and Reedfish)

Acnipenseriformes (Paddlefish and Sturgeons)

Halecomorphi (Bowfins)

Ginglymodi (Gars)

Elopocephalai (Eels, Ladyfish, Halosaurs, and others)

Osteoglossocephala (Arapaima, Goldeye, and others)

Clupei (Herrings and Anchovies)

Apelocephali (Slickheads and others)

Anotophysa (Milkfish, Beaked Salmon, and others)

Cypriniformes (Carp, Goldfish, Loaches, Minnows, and others)

Characiformes (Characins, Pacu, Pirahnas, Tetras, and others)

Gymnotiformes (Knifefish and Electric Eels)

Siluriformes (Catfish)

Lepidogalaxii (Salamanderfish)

Protacanthopterygii (Salmon, Pike, Trout, Barreleye, and others)

Stomiati (Smelts, Marine Hatchetfish, and others)

Ateleopodia (Jellynose Fish)

Aulopa (Bombay Duck and Lancetfish)

Myctophata (Lanternfish)

Acanthomorpha:

Lampridacea (Oarfish, Opah and others)

Paracanthomorphacea (Cods, Dories, Cavefish, and others)

Polymixiacea (Beardfish)

Berycimorphaceae (Fangtooths, Pineconefishes, and others)

Holocentrimorphaceae (Soldierfish)

Ophidiiformes (Pearlfish)

Batrachoidimophara (Toadfish)

Gobiomorpharia (Seahorses, Pipefish, Tunas, Flying Gurnards, and others)

Anabantaria (Gouramis, Swamp Eels, and others)

Carangaria (Swordfish, Flatfish, Remoras, and others)

Ovalentaria (Blennies, Cichlids, Flying Fish, Mullets, and others)

Eupercaria (Anglerfish, Pufferfish, Wrasses, Sunfish, Sticklebacks, Lumpsuckers, Lionfish, Angelfish, Perches, Archerfish, Triggerfish, Bass, and others)

Sarcopterygii:

Actinistia (Coelocanths)

Dipnoi (Lungfish)

BEASTS PROPER:

Lissamphibia

Salientia (Frogs and Toads)

Caudata (Salamanders and Newts)

Gymnophiona (Caecilians)

Reptilia (Non-Aves)

Rhynchocephalia (Tuatara)

Dibamidae (Blind Skinks)

Gekkota (Geckos and Flap-Footed Lizards)

Scinciformata (Skinks and others)

Laterata (Tegus and Worm Lizards)

Anguimorpha (Slow Worms, Monitors, Gila Monster, and others)

Iguania (Anoles, Iguanas, Chameleons, and others)

Serpentes (Snakes)

Testudines (Turtles and Tortoises)

Crocodilia (Crocodiles, Gharials, Alligators, and Caiman)

Aves (Non-Passeriformes):

Palaeognathae (Ostriches, Kiwis, and others)

Galloanserae (Chickens, Ducks, and others)

Mirandornithes (Flamingos and Grebes)

Columbimorphae (Doves and others)

Otidimorphae (Cuckoos, Turacos, and Bustards)

Gruimorphae (Gulls, Cranes, Auks, and others)

Ophistocomidae (Hoatzins)

Strisores (Hummingbirds, Nightjars, Potoos, and others)

Phaethoquornithes (Boobies, Loons, Ibises, Penguins, Albatrosses, Tropicbirds, and others)

Acciptirimorphae (Vultures, Hawks, Eagles, and others)

Strigiformes (Owls)

Coraciimorphae (Kingfishers, Woodpeckers, Quetzals, and others)

Cariamiformes (Seriemas)

Falconiformes (Falcons)

Psittaciformes (Parrots)

Passeriformes:

Acanthisitti (New Zealand Wrens)

Tyranni (Overnbirds, Spadebills, Gnateaters, and others)

Menurida (Lyrebirds and others)

Climacterida (Bowerbirds and others)

Meliphagida (Honeyeaters, Bristlebirds, and others)

Orthonychida (Logrunners and others)

Corvides (Crows, Jays, Boatbills, Shriketits, Sittellas, Birds-Of-Paradise and others)

Passerides (Satinbirds, Sparrows, Larks, Tits, Oxpeckers, Thrushes, Wrens, Finches, Tanagers, Nuthatchers, and others)

Mammalia (Non-Laurasiatheria):

Monotremata (Platypus and Echidnas)

Marsupialia (Kangaroos, Opossums, Wombats, and others)

Xenarthra (Anteaters, Sloths, and others)

Athrotheria (Elephants, Manatees, Aardvarks, and others)

Lagomorpha (Rabbits, Hares and others)

Rodentia (Mice, Rats, Cavies, Beavers, Squirrels, and others)

Scandentia (Treeshrews)

Dermoptera (Colugos)

Primates (Lemurs, Marmosets, Baboons, Gibbons, Chimpanzees, and others)

Lauasiatheria (Non-Carnivora):

Eulipotyphla (Shrews, Moles, Hedgehogs, and others)

Chiroptera (Bats)

Artiodactyla (Girrafes, Deer, Whales, Pigs, Camels, and others)

Perissodactyla (Horses, Tapir, and Rhinoceros)

Pholidota (Pangolins)

Carnivora:

Viverroidea (Hyenas, Mongooses, Civets, and others)

Feloidea (Lions, Tigers, Caracals, Wildcats, Leopards, and others)

Nandiniidae (African Palm Civet)

Caninae (Wolves, Foxes, and others)

Ursidae (Bears)

Musteloidea (Skunks, Weasels, Otters, Raccoons, and others)

Pinnipedia (Seals, Sea Lions, and Walruses)

Interview questions for gym leaders

[animalids]

Red thatched barnacle (Tetraclita rubescens)

Photo by Marlin Harms

[dendroica]

Barnacle (by me)

[taxonomytournament]

Taxonomy Tournament: Crustaceans

Thecostraca. This class is made up of barnacles, marine sessile filter feeders commonly found attached to boats, along with other genera that are parasites of echinoderms

Tantulocarida. This class is made up of minute external parasites that infect other crustaceans

[underthehedge]

Oh man, yeah there's a bunch of parasitic barnacles that infect decapods too that are just like...well you can't tell they're a barnacle from looking. They start out as your standard crustacean naupilus and moult into a barnacle cyprid lava like a normal barnacle, but then, when a female Sacculina finds an uninfected crab she moults into a kinda living hypodermic needle and then moults again in a way that kinda just...injects part of herself into the crab, abandoning the rest of her body like organs etc. This grows roots through its body and an external sack which the crab treats like its own eggs (regardless of the sex of the crab btw).

The blobby bit under the crab? That's the external part of a parasitic barnacle. The internal bit spreads through the whole rest of the crab but they're so fine there's not really any good images online.

And the weird thing is that they're only somewhat related to Dendrogaster, like they're both in the Thecostraca but Sacculina and its relatives are nested within the larger grouping of barnacles so like, they've evolved "weird, blobby internal parasites" at least twice.

Dendrogaster (a crustacean that parasitizes starfish)

[rattyexplores]

Barnacles at home on a Mangrove tree

many people don’t seem to realize that barnacles are a kind of crustacean. Well, you do now.

Why they’ve called a Mangrove tree home, is because they simply look for any sturdy surface to latch onto. Permanently. That’s why they’re often found on man-made structures.

Unidentified, Family Chthamalidae

15/06/22

[thegrandimago]

Taken 2022 22nd January, ever heard the story 'The Ugly Barnacle'? Well I hope you heard of 'Balanus balanus'. These barnacles reside in the Arctic Ocean and the northern seas near it. They start their lives as free-swimming larva among zooplankton before cementing themselves on a surface their cement glands can bind to. They then live out their lives breeding as hermaphrodites and filter-feed using their legs. #animal #animal #animals #djur #wildlife #natur #naturliv #nature #fauna #naturalhistory #naturhistoriska #preservedspecimen #arthropods #arthropod #kräftdjur #crustacean #crustaceans #barnacles #barnacle #acornbarnacle #acornbarnacles #havstulpaner #havstulpan #animalia #arthropoda #crustacea #thecostraca #balanomorpha #balanidae #balanus #balanusbalanus (at Evolutionsmuseet) https://www.instagram.com/p/CZN5kALqV1y/?utm_medium=tumblr

[evoldir]

Fwd: Postdoc: GeorgeWashingtonU.MolecularSystematics

Begin forwarded message: > From: evoldir@evol.biology.mcmaster.ca > Subject: Postdoc: GeorgeWashingtonU.MolecularSystematics > Date: 10 August 2024 at 05:11:52 BST > To: rdmpage@gmail.com > > > > Postdoc in Barnacle Molecular Systematics at George Washington University > (GWU) > > About the Project > The Computational Biology Institute, at the Milken Institute School of > Public Health’s Department of Biostatistics and Bioinformatics, GWU, > is offering a Postdoc position to develop a comprehensive phylogeny of > the barnacles (Crustacea: Thecostraca) and study the evolution of sexual > systems.Barnacles rank among the most biologically diverse, ubiquitous and > ecologically important marine metazoans. They exhibit a fascinating and > unique range of sexual systems, including hermaphroditism (both sexes), > dioecy (separate sexes) and androdioecy (hermaphrodites and males).We want > to apply exon probes for targeted capture sequencing to ~1,200 barnacle > species to build a robust phylogeny of the Thecostraca. Then coupling this > barnacle tree with fossil, morphological and ecological information in > a comparative analysis framework, we will test long-standing theoretical > predictions about the evolution of sexual systems and its diversification > across broad spatial, temporal and ecological scales. > > About the Postdoc > > The postdoc candidate will conduct research in phylogenomics and > evolutionary biology of barnacles and work together with the PI (Pérez- > Losada), collaborators and graduate students. Responsibilities: > - Compilation, generation and curation of genomic and other >  (e.g., morphological and ecological) trait data for selected >  barnacle species. > - Bioinformatic analysis of genomic data to infer phylogenies and >  perform comparative analyses on traits to test hypotheses. > - Preparation and submission of manuscripts to scientific journals. > - Availability to travel to other institutions and work abroad for short >  periods of time. > - Training of graduate and undergraduate students in the lab on the above- >  mentioned duties. > - Delivering guest lectures or short workshops for relevant courses and >  related topics offered at GW in the disciplines involved in the >  research program. > > Qualifications > > PhD and expertise in molecular systematics, bioinformatics, comparative > phylogenetic methods, genomics and ideally barnacle taxonomy. > > Hiring Range > 61,008 - 65,000 > > Expected duration of appointment > Up to 3 years renewable every year upon performance > > Starting date > 01/09/2024 > > Healthcare Benefits > GWU offers a comprehensive benefit package for Postdoc Associates and > Scholars that includes medical, dental, vision, life & disability > insurance, time off & leave, well-being and various voluntary > benefits. Postdoc Scholars may also be eligible for retirement savings > and tuition programs. For program details and eligibility, please visit > https://ift.tt/HF9oVA7. > > Applicant Documents to Submit > Cover Letter > Curriculum Vitae > Statement of Research Interest > Two Letters of Recommendation > > Online Application > > All candidates must apply online via the following GWU link > https://ift.tt/ypOdzxc > > Contact > If you have further questions regarding this position you can email > Marcos Perez-Losada at mlosada@gwu.edu > > Marcos Perez-Losada, PhD > > > Marcos Perez-Losada

[erranteaindabem]