Invertebrate Taxonomy + Larvae

Lophophorates

3 Phyla: Phoronida, Bryozoa, Brachipoda

A group of aquatic invertebrates characterized by a lophophore, a crown of tentacles used for feeding and respiration. They are often sessile and primarily found in marine environments.

Larva: phoronid: Actinotroch Bryozoan, class gymnolaemata: cyphonautes

Nemertea

2 Classes: Anopla, Enopla

sister group to mollusca

unqiue proboscis to feed

Larva: pilidum larva

Nematoda and Nematomorpha

3 Classes: Chromadorea, Enoplia, Dorylaima

free-living and parasitic, can do cryptobiosis

Larva: filariform, microfilariae

loricate (priapula)

Annelida

4 classes: Clitellata, Polychaeta, Echiurans, Sipunculans

Characteristics: chitinous setae (not in sippies), repeating segments

Larva: trochophore (ciliates round guy)

Arthropoda, Pancrustacea, Mandibulata: Crustacea

Crustacea: Cephalocarida, Branchipoda (cryptobiosis), Thecostra, Malacostraca, Branchiura, Mystacocarida, Copepoda, Ostracoda

Nauplius larva (copepoda, theocostraca)

In Malacostraca: Zoea (shrimp-like) then Megalopa (crab like)

Theocostraca: cypis larva

Arthropoda: Pancrustacea: Mandibulata: Hexapoda

Hexapoda classes: Entognatha, Ectognatha/Insecta

Hemimetabolous: direct, instars

Holometabolous: indirect, chrysalis or cocoon, pupa to adult

Arthropoda: Chelicerata, Mandibulata

Chelicerata Classes: Pycnogonida, Merostomata, Arachnida

Larva: mostly gonochoristic, no specific larva

Mandibulata Classes: Myriapoda: 2 classes: Chilopoda, Diplopoda

Larva: no specific larva

Panarthropoda

Phylum: Onychophora and Tardigrada

Larva for O: have yolk egg

Larva for Tardi: no larval stages, but can do cryptobiosis