Invertebrates Flashcards
Animals that don’t have a backbone, but some have harder outer shells or exoskeletons for protection
Invertebrates
Around ___% of all animals species are invertebrates
95%
Invertebrates are incredibly diverse, with over how many different phyla?
30
Most common phyla (8)
Porifera
Mollusca
Annelida
Echinodermata
Cnidarians
Platyhelminthes
Nematoda
Arthropoda
A phylum of primitive invertebrate animals commonly known as ____
Porifera
Sponges
Classes of sponges (4) and scientific name
Calcarea ( calcareous Sponges)
Hexactinellida (Glass sponges)
Demospongiae (Demosponges)
Homoscleromorpha (Encrusting sponges)
Second largest phylum of invertebrate animals, after anthropoda.
Mollusca
Are soft-bodied animals, typically with a muscular foot for locomotion, a mantle that secretes a calcareous shell, and visceral mass that contains the internal organs
Mollusca
Classes of mollusks (8)
Aplacophora
Polyplacophora
Monoplacophora
Bivalvia
Gastropoda
Scaphopoda
Cephalopoda
Hyolitha
Also known as ____ are a large phylum of invertebrate animals found in a variety of habitats, including marine, freshwater and terrestrial environment
Annelida
Segmented worms
Classes of annelids (3)
Polychaetes
Oligochaetes
Hirudinea
A phylum of marine invertebrates, easily recognizable by their radial symmetry and spiny skin.
Echinodermata
Echinodermata comes from the greek words ____meaning ___ and ___ meaning ___ a reference to their characteristics spines or bumps that cover their bodies
Echinos
Spiny
Derma
Skin
Classes of echinoderms and scientific name (5)
Asteroidea (sea stars)
Ophiuroidea (brittle stars)
Echinoidea (sea urchins and sand dollars)
Crinoidea (sea lilies and feather stars)
Holothuroidea (sea cucumber)
A phylum of aquatic invertebrates. They are known for their stinging cells called ____
Cnidarians
Nematocyst
Classes of cnidarians (4)
Anthozoa (sea anemones and corals)
Scyphozoa (true jellyfish)
Cubozoa (box jellyfish)
Hydrozoa
Also known as ____ (from the greek ___ meaning ____“flat” and helminth meaning ___
Platyhelminthes
Flatworms
Platy
Helminth
Worm
They are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates
Platyhelminthes
Classes of flatworms (4)
Turbellaria (planarians)
Monogenea (monogenetic flukes)
Trematoda (flukes)
Cestoda (tapeworms)
A phylum of invertebrate animals. Also known as ____ or ____
Nematodes
Roundworms
Eelworms
They are one of the most abundant animal groups on earth, found in a wide variety of habitats including soil, freshwater, marine environment and even inside other animals as parasite
Nematoda
Classes of nematodes (2)
Adenophorea
Secernentea
Are invertebrates that make up about ___% of all the animals on earth
Arthropoda
75
All share some common characteristics such as segmented bodies, jointed limbs and exoskeleton
Arthropoda
Classes of arthropods (5)
Insecta
Arachnida
Chilopoda (centipede)
Diplopida (millipede)
Crustacea
They are multicellular organisms that have a cellular grade of construction, meaning they lack true tissues and organs
Sponges
Their bodies are permeated by ___ and ___ through which water flows
Sponges
Canals
Chambers
Sponges are ___ that obtain nutrients from the water that passes through their bodies
Filter feeders
These sponges have spicules made of calcium carbonate which is also the main component of seashells
Calcarea (calcareous Sponges)
Typically small and delicate and are
Found in shallow marine waters
Calcarea (calcareous Sponges)
These sponges have a skeletal network of six pointed spicules made of silica, which is also the main component of glass
Hexactinellida ( glass sponges)
Found in deep, cold marine waters and can grow to be quite large
Hexactinellida ( glass sponges)
The largest and most diverse class of sponges, containing about __% of all known sponge species.
Demospongiae (Demosponges)
90%
Can have spicules made of silica or spongin or a combination of both.
Demospongiae (Demosponges)
Found in a wide range of habitats from freshwater to deep sea
Demospongiae (Demosponges)
The rarest and most recently recognized class of sponges with only about ___ known species.
Homoscleromorpha ( Encrusting sponges)
117
Have simple body structure and lack spicules altogether
Homoscleromorpha (Encrusting sponges)
Found in marine waters, where they encrust on ROCKS and other hard surfaces
Homoscleromorpha ( Encrusting sponges)
Second largest and soft-bodies animals, typically with a muscular foot for locomotion, a mantle that secretes a calcareous shell, and a visceral mass that contains the internal organs
Mollusca
