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The Species File Group builds taxonomic databases, and the Phasmida Species File (phasmida.speciesfile.org) is its database for the world's stick and leaf insects. It is a taxonomic, nomenclatural, and bibliographic resource covering all extant and fossil phasmids, and it is the place to check valid names, synonyms, literature, specimen records, images, sounds, and distributions for this group. Use it when you need an authoritative name for a phasmid, want to trace a synonym, or need distribution and bibliographic data to cite.

What the database contains

According to the site, the Phasmida Species File group works to build a comprehensive source of knowledge about the world's phasmids. Information found there includes:

• Valid names and their synonyms
• Bibliographic data
• Specimen data
• Images
• Sounds
• Distributions

Coverage spans both extant and fossil taxa, so the file is not limited to living species.

How to look things up

The site is built around taxon pages, and you can enter at whatever level you already know.

• By family or genus: start at a higher rank if you only know the group, for example Order = Phasmida, Family = Phylliidae, or Genus = Anchiale.
• By name: search a family, genus, or species directly. The site's own examples are Phasmatidae, Phasma, and Phasma gigas.
• By example species: the homepage highlights Diapherodes gigantea, Pterinoxylus crassus, Pulchriphyllium giganteum, Agathemera maculafulgens, and Dryococelus australis, which you can use as entry points to see how a taxon page is structured.

A practical workflow: search the name you have, confirm whether it is the valid name or a synonym, then follow the bibliographic and distribution data from the taxon page.

Who it is for

The site states it seeks to include and serve an expanding group of stakeholders: taxonomists, ecologists, policy makers, and educators. In practice that means the same record can support a nomenclature check, an ecological or distribution query, a policy reference, or teaching material.

Project background, gaps, and contributing

The About page contains an overview and history of the project, its data and gaps, and information about the team and how you can contribute. There are also contact and help routes if you need assistance. If you plan to rely on the file for research, checking the stated data gaps first is worthwhile.

Recent announcements

• 2023-08-15: Paul D Brock, T H Büscher, and E Baker welcomed users to the new Phasmida Species File website, inviting feedback on the new features and on how the information is used.
• November 2022: Brock & Büscher published Stick and leaf-insects of the world, Phasmids (NAP Editions), which includes a world checklist of species.
• 31 Dec 2022: Phasmid Studies Vol 21 was published, with papers uploaded.

The Phasmida Species File is a taxonomic, nomenclatural, and bibliographic database covering the world's stick and leaf insects (order Phasmida), including both living and fossil taxa. It is the resource to use when you need to verify a valid species name, trace a synonym, find the original publication behind a name, or check where a phasmid has been recorded. It suits taxonomists, ecologists, policy makers, and educators — anyone who needs an authoritative name rather than a casual identification.

What the database contains

According to the site itself, the Phasmida Species File group works to build a comprehensive source of knowledge about the world's phasmids. The information found there includes:

• Valid names — the currently accepted name for a taxon
• Synonyms — alternative names that have been applied to the same taxon
• Bibliographic data — the literature behind names and records
• Specimen data — records tied to physical specimens
• Images and sounds — media associated with taxa
• Distributions — where phasmids of the world have been recorded

This combination is what makes it a species file rather than a simple checklist: a name is only useful if you can see what it means, where it came from, and what else has been called by that name.

How to search it

The site is built around taxon pages, so you can enter at whatever level you already know.

If you know the scientific name, search for it directly. The site gives these examples:

• Phasmatidae (a family)
• Phasma (a genus)
• Phasma gigas (a species)

If you want to browse rather than search, start from a rank and work down. The site suggests entering at:

• Order = Phasmida
• Family = Phylliidae
• Genus = Anchiale

If you only have a common name or a photo, you cannot search by "stick insect" and expect a species. You need to narrow to a group first — for example, leaf insects point toward Phylliidae — then browse the genus pages and compare the images and distribution records listed there.

The site's own examples of taxa with pages include Diapherodes gigantea, Pterinoxylus crassus, Pulchriphyllium giganteum, Agathemera maculafulgens, and Dryococelus australis.

What you get from a taxon page

A taxon page is where the database earns its keep. In practice you use it to answer four questions:

1. Is this name still valid? If it has been synonymized, the page should lead you to the accepted name.
2. What is the original reference? The bibliographic data tells you who described it and where.
3. What specimens exist? Specimen records show what the name is anchored to.
4. Where does it occur? Distribution data tells you the recorded range.

For a policy maker or ecologist, the distribution and valid-name fields are usually the deciding ones. For a taxonomist, the synonymy and bibliography are.

Contributing, getting help, and project background

The site's About page contains an overview and history of the project, its data and gaps, information about the team, and how you can contribute. There are also contact and help routes if you hit a problem or want to report something.

The current site launched in August 2023; the announcement (Paul D Brock, T H Büscher, E Baker, 2023-08-15) welcomes users to the new Phasmida Species File website and invites feedback on the new features and on how the information is used. A related 2022 publication, Brock & Büscher's Stick and leaf-insects of the world, Phasmids (NAP Editions), includes a world checklist of species, and Phasmid Studies Vol 21 was published on 31 Dec 2022 with its papers uploaded.

Practical notes

• Names change. A name you used five years ago may now be a synonym. Always check the valid name before publishing or citing.
• Gaps are acknowledged. The project describes its data and gaps openly, so absence of a record is not proof of absence in the field.
• Use the rank you have. If you only know the family, start there and browse; do not guess a species name to force a search result.
• Cite the source. Because the file is bibliographic, it gives you the reference to cite rather than requiring you to reconstruct it.

Taxonomy is the science of naming, describing, and classifying organisms into hierarchical groups, and a taxonomic database is the practical tool that stores those names and their relationships in a searchable form. The Phasmida Species File is a working example: it is a taxonomic, nomenclatural, and bibliographic database covering the world's stick and leaf insects, including both living and fossil taxa. If you need to check whether a phasmid name is valid, find its synonyms, or trace the literature behind a species, this kind of database is where you start.

The core units of taxonomy

Taxonomy arranges life into nested ranks. From broad to narrow, the main ranks you will encounter are:

• Order — a major group, such as Phasmida (stick and leaf insects).
• Family — a subdivision of an order, such as Phylliidae (leaf insects).
• Genus — a group of closely related species, such as Anchiale or Phasma.
• Species — the basic unit, usually written as a two-part name, for example Phasma gigas.

Each named group at any rank is called a taxon (plural: taxa). A species name is not just a label; it is tied to a described specimen and to the published work that established it.

Valid names, synonyms, and nomenclature

Nomenclature is the set of rules governing how names are formed and which one is correct. In practice, a single organism may have been described under several different names over time. Taxonomy distinguishes between:

• Valid name — the name currently accepted for a taxon.
• Synonym — an alternative name that has been applied to the same taxon but is not the accepted one.

The Phasmida Species File explicitly records valid names and their synonyms alongside bibliographic data, so you can see not only what a species is called now but also what it has been called before. This matters because older literature, museum labels, and field notes may use a name that is no longer current.

How a taxonomic database organizes records

A database like the Phasmida Species File mirrors the taxonomic hierarchy so that you can navigate from a broad group down to a single species. The site suggests several entry points:

• Start at Order = Phasmida to browse everything.
• Narrow to Family = Phylliidae for leaf insects.
• Go directly to Genus = Anchiale.
• Or search by a specific name such as Phasmatidae, Phasma, or Phasma gigas.

This structure means the same record can be reached from different directions — by rank, by name, or by search — while still pointing to one authoritative entry.

What a species record can contain

According to the Phasmida Species File, information held for phasmids includes:

Not every species will have every field filled in; coverage varies, which is why the project's About page discusses its data and gaps.

Why taxonomy matters

Consistent naming is what allows researchers, ecologists, policy makers, and educators to refer to the same organism and be understood. Without an agreed valid name and a record of synonyms, a study of Phasma gigas might be impossible to connect to earlier work that used a different label. A taxonomic database solves this by acting as a single reference point for names, their history, and their supporting literature.

Using the Phasmida Species File

To look up a phasmid:

1. Choose an entry point — search a name, or browse by order, family, or genus.
2. Open the taxon record — you will see the valid name and associated data.
3. Check synonyms and bibliography — confirm whether an older name maps to the current one.
4. Note the distribution and specimen data — useful for identification and reference.

The project also invites contributions and questions through its About and contact pages, so gaps you notice can potentially be addressed. As of August 2023 the site was relaunched with new features, and it continues to serve an expanding group of stakeholders.

Stick insects are insects in the order Phasmida, a group that also includes leaf insects. To find authoritative information about them—valid names, synonyms, literature, specimen records, images, sounds, and distributions—use the Phasmida Species File at phasmida.speciesfile.org, a taxonomic, nomenclatural, and bibliographic database covering the world's extant and fossil phasmids.

What Counts as a Stick Insect

"Stick insect" is a common name, not a taxonomic rank. The Phasmida Species File treats the group as the order Phasmida, and describes its scope as "the world's phasmids, or stick and leaf insects." So the database's coverage is broader than the twig-like insects most people picture: leaf insects (for example, the family Phylliidae) belong to the same order.

This matters when you search. If you look only for things called "stick insect," you will miss leaf insects and other phasmids that carry different common names.

Stick Insects vs. Similar-Looking Insects

Many insects resemble twigs or leaves, but resemblance alone does not make them phasmids. The reliable answer comes from taxonomy—the classification and naming of organisms—rather than from appearance. The Phasmida Species File is built precisely to record that classification, so it is the place to confirm whether a given insect is a phasmid and what its accepted name is.

What the Phasmida Species File Contains

According to the site, the Phasmida Species File group works to build a comprehensive source for knowledge about the world's phasmids. The information found there includes:

• Valid names and their synonyms
• Bibliographic data (the literature behind the names)
• Specimen data
• Images and sounds
• Distributions for phasmids of the world

The site states that it seeks to include and serve an expanding group of stakeholders, including taxonomists, ecologists, policy makers, and educators. That range is a useful signal: the same records support a naming decision by a researcher and a distribution question from an educator or policy user.

How to Search the Database

The site offers several entry points. You can search by name, or start from a higher rank and work down. The examples it gives are:

• Family: Phasmatidae
• Genus: Phasma
• Species: Phasma gigas
• Order: Phasmida
• Family: Phylliidae
• Genus: Anchiale

A practical sequence:

1. Start broad if you are unsure of the name. Begin at Order = Phasmida, then narrow to a family such as Phasmatidae or Phylliidae.
2. Search a name you already have. Enter a genus (Phasma) or a species (Phasma gigas) to reach its record.
3. Read the record for the full picture. Expect the accepted name, synonyms, bibliographic references, specimen data, images, sounds, and distribution where available.
4. Verify before you cite. Because names and classifications are revised over time, check the record against the current literature and the site's announcements rather than relying on an older secondary source.

Expected result: you should arrive at a taxon page for the group or species you searched, with the nomenclatural and bibliographic details attached to it.

Common Sticking Points

• Common names are unreliable. "Stick insect" and "leaf insect" are informal; the database organizes around scientific names and ranks.
• Synonyms cause confusion. A name you find in older literature may appear as a synonym rather than the valid name. The record is where that relationship is stated.
• Coverage is a work in progress. The site itself points to information about "its data and gaps," which is a reminder that absence of a record is not proof that a taxon does not exist.

Where to Go for More

The site's About page contains an overview and history of the project, its data and gaps, and information about the team and how you can contribute. There are also contact and help routes if a search does not behave as expected.

For dated context, the announcements note that the new Phasmida Species File website launched in August 2023 (Paul D Brock, T H Büscher, E Baker, 2023-08-15). A related 2022 publication is Brock & Büscher, Stick and leaf-insects of the world, Phasmids (NAP Editions), described as including a world checklist of species, and Phasmid Studies Vol 21 was published on 31 Dec 2022.

If your goal is a quick identification, start with a name search. If your goal is a defensible citation, start at the order or family level, follow the record through to its bibliographic data, and confirm the current status before you publish.