- Series title: Treatise Online
- Activity: 2010–present
- ISSN: 2153-4012 (online), 2381-1528 (print)
- Series website
- See also: Treatise on Invertebrate Paleontology
- List of Treatise Online chapters:
- Part E, Porifera (Revised), vol. 4
- Part F, Coelenterata (Revised), vol. 2
- Part G, Bryozoa (Revised), vol. 2
- Part L, Mollusca 4 (Revised), vol. 3B
- Part M, Mollusca 5 (Coleoidea)
- Part R, Arthropoda 4 (Revised), vol. 1
- Chapter 8F: Systematic descriptions: Infraorder Palaeopalaemonida (2013)
- Chapter 8G: Systematic descriptions: Infraorder Polychelida (2013)
- Chapter 8H: Systematic descriptions: Infraorder Achelata (2015)
- Chapter 8I: Systematic descriptions: Infraorder Glypheidea (2015)
- Chapter 8J: Systematic Descriptions: Infraorder Astacidea (2016)
- Chapter 8M: Systematic descriptions: Infraorder Brachyura, Section Dromiacea (2012)
- Chapter 8N: Systematic descriptions: Infraorder Brachyura, Section Homoloida (2012)
- Chapter 8O: Systematic descriptions: Section Torynommoida (2017)
- Chapter 8P: Systematic descriptions: Section Etyoida (2017)
- Chapter 8Q: Systematic descriptions: Section Dakoticancroida (2017)
- Chapter 8R: Systematic descriptions: Section Cyclodorippoida (2017)
- Chapter 8S: Systematic descriptions: Section Raninoida (2018)
- Chapter 8T1: Systematic descriptions: Superfamily Retroplumoidea Gill, 1894 (2018)
- Chapter 8T2: Systematic descriptions: Superfamily Carpilioidea (2018)
- Chapter 8T3: Systematic descriptions: Superfamily Leucosioidea (2019)
- Chapter 8T4: Systematic descriptions: Superfamily Calappoidea (2019)
- Chapter 8T5: Systematic descriptions: Superfamily Aethroidea (2019)
- Chapter 8T6: Systematic descriptions: Superfamilies Componocancroidea and Orythioidea and Family Marocarcinidae (2019)
- Chapter 8T7: Systematic descriptions: Superfamily Cancroidea (2019)
- Chapter 8T8: Systematic descriptions: Superfamilies Belloidea, Bythograeoidea, Dairoidea, and Palicoidea (2020)
- Chapter 8T9: Systematic descriptions: Superfamily Parthenopoidea (2020)
- Chapter 8T10: Systematic descriptions: Superfamily Eriphioidea (2020)
- Chapter 8T11: Systematic descriptions: Superfamily Majoidea (2020)
- Chapter 8T12: Systematic descriptions: Superfamily Gecarcinucoidea (2020)
- Chapter 8T13: Systematic descriptions: Superfamily Trichodactyloidea (2020)
- Chapter 8T14: Systematic descriptions: Superfamily Potamoidea (2020)
- Chapter 8T15: Systematic descriptions: Superfamily Portunoidea (2021)
- Chapter 8T16: Systematic descriptions: Superfamilies Trapezioidea and Xanthoidea (2021)
- Chapter 8T17: Systematic descriptions: Superfamily Dorippoidea (2021)
- Chapter 8T18: Systematic descriptions: Superfamily Pilumnoidea (2022)
- Chapter 8T19: Systematic descriptions: Superfamily Goneplacoidea (2022)
- Chapter 8T20: Systematic descriptions: Superfamily Pseudozioidea (2022)
- Chapter 8T21: Systematic descriptions: Subsection: Thoracotremata (2023)
- Chapter 8T22: Systematic descriptions: Infraorder Anomura (exclusive of Lithodoidea, Lomisoidea, and Paguroidea) (2023)
- Chapter 8T23: Systematic descriptions: Section Callichimaeroida (2023)
- Chapter 8T24: Systematic descriptions: Infraorders Axiidea and Gebiidea (2023)
- Chapter 8T28: Systematic descriptions: Superfamily Pseudothelphusoidea (2023)
- Systematic descriptions: Additions to Infraorder Polychelida (2023)
- Systematic descriptions: Anomura (Gastrodoroidea, Lithodoidea, Lomisoidea, Paguroidea) (2023)
- Systematic descriptions: Infraorders Procaridea, Stenopodea, Caridea (2023)
- Systematic descriptions: Order Decapoda incertae sedis (2023)
- Systematic descriptions: Suborder Dendrobrachiata (2023)
- Systematic descriptions: Additions to Infraorders Achelata and Astacidea (2024)
- Systematic descriptions: Additions to Infraorder Brachyura, Section Dromiacea, and Infraorder Glypheidea (2024)
- Systematic descriptions: Additions to Sections Homoloida, Dakoticancroida, Cyclodorippoida, and Raninoida (2024)
- Systematic descriptions: Additions to Superfamilies of Eubrachyura, exclusive of Thoracotremata (2024)
- Part V (Second Revision)
- Chapter 1: Introduction to the Hemichordata (2021)
- Chapter 2: Class Enteropneusta: Introduction, Morphology, Life Habits, Systematic Descriptions, and Future Research (2018)
- Chapter 3: Introduction to the Class Pterobranchia Lankester, 1877 (2016)
- Chapter 14: Order Cephalodiscida: Introduction and systematic descriptions (2017)
- Chapter 15: Subclass Graptolithina and incertae sedis family Rhabdopleuridae: Introduction and systematic descriptions (2018)
- Chapter 16: Order Graptolithina, uncertain families: Introduction, morphology, and systematic descriptions (2019)
- Chapter 17: Order Dendroidea Nicholson, 1872: Introduction, morphology and systematic descriptions (2020)
- Chapter 18: Order Graptoloidea and Family Anisograptidae: Introduction, Morphology, and Systematic Descriptions (2017)
- Chapter 20: Suborder Dichograptina: Introduction, morphology, and systematic descriptions (2018)
- Chapter 21: Suborder Glossograptina: Introduction, Morphology, and Systematic Descriptions (2016)
- Chapter 22: Suborder Axonophora, Infraorder Diplograptina I (Diplograptidae, Lasiograptidae): Introduction, morphology, and systematic descriptions (2019)
- Chapter 23: Suborder Axonophora, Infraorder Diplograptina II (Climacograptidae, Dicranograptidae): Introduction, morphology, and systematic descriptions (2020)
- Chapter 24: Infraorder Neograptina and family Normalograptidae: Introduction, morphology, and systematic descriptions (2019)
- Chapter 25: Superfamily Retiolitoidea and family Neodiplograptidae: Introduction, morphology, and systematic descriptions (2019)
- Chapter 26: Family Retiolitidae: Introduction, morphology, and systematic descriptions (2018)
- Chapter 27: Superfamily Monograptoidea and Family Dimorphograptidae: Introduction, Morphology, and Systematic Descriptions (2017)
- Chapter 28: Family Monograptidae: Introduction, morphology, and systematic descriptions (2021)
- Chapter 29: Uncertain genera (2021)