Hammondia
genus of Conoidasida
Hammondia is a genus of parasitic alveolates in the phylum Apicomplexa.
History
This genus was created in 1975. Before this date the species of this genus were confused with Toxoplasma gondii to which they are closely related.
The canid-infecting species, H. heydorni and H. triffittae, have been split into new genus Heydornia based on the molecular phylogenetic analysis.
Life cycle
The species in this genus have two vertebrate hosts in their life cycle: a felid (the definitive host) and prey species (the intermediate host), which vary and depend on the local fauna but include mice, deer and others.
In the gastrointestinal tract of the definitive host the parasite undergoes sexual reproduction, forms a zygote which after some divisions forms a cyst that is excreted. The cyst is subsequently ingested by the prey species in whom the parasite decysts and invades its tissues wherein it again multiplies and encysts. After ingestion of the tissues of the prey species by the definitive host the parasite again decysts and multiplies. It also undergoes sexual reproduction before encysting again.
Genome
The genome of Hammondia hammondi has been sequenced.
This brief starts where responsible research should: with the source description of “Hammondia” as genus of Conoidasida. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the science & nature register because the source frames it as genus of Conoidasida. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Dec 8, 2025. The linked authority identifier is Q16982700. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1975.
A general summary may omit uncertainty, sample limits or methodological disagreement that is explicit in the technical record. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.
- Current terminology
- Classification context
- Finding cited technical literature
Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.
Three-step research path
- Establish the record: confirm the title “Hammondia”, its source revision and the description used here.
- Expand the search: follow Hammondia primary sources, Hammondia archive and Hammondia research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Hammondia”?
- Which observation, specimen, dataset or publication supports the account?
- Is the terminology current, historical or disputed?
Search terms from this dossier
This entry incorporates text from “Hammondia” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.