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Joined 2026-09-21 Message
Incoming links: Caviidae in NCBI Taxonomy
Caviidae 2026-11-05
Caviidae is a taxonomic family of rodents containing the taxonomic genus Cavia, which includes the domestic guinea pig. The inspected NCBI family tree also contains Dolichotis. Thus Caviidae is broader than either one of those genera, while remaining within Rodentia.[ref]
Caviidae in NCBI Taxonomy. TaxID10139, lineage and children
For a classification example, a record identified as Cavia porcellus belongs to Cavia and Caviidae. A record assigned to Dolichotis can share the family while belonging to a different genus. The shared family does not make the two records the same species, and a family-level sequence label does not identify the domestic guinea pig specifically.
This matters when comparing biological experiments. A reported response in a named species and preparation cannot be promoted automatically to a measured property of every member of Caviidae. The family supplies evolutionary and taxonomic context, while the experimental organism must still be identified at the resolution needed for the question. The cited classification fixes which provider's family usage is being followed; no numerical species count is needed to understand the distinction.
Dolichotis 2026-11-05
Dolichotis is a taxonomic genus of rodents in Caviidae. It includes Dolichotis patagonum, the Patagonian mara. The alternative common name Patagonian hare does not place it in Lagomorpha: its family relationship is to rodents such as Cavia.[ref]
Dolichotis patagonum in Mammal Diversity Database. Record1001207, taxonomic placement and common name
[ref]Caviidae in NCBI Taxonomy. Family tree, Dolichotis and Cavia
Field observations reveal an unusual combination of social scales. A 1992 study of Dolichotis patagonum described pair relationships together with communal breeding: young from several pairs shared a warren. Larger groups had greater collective vigilance and higher pup survival, although each pair spent less time sitting alert at the warren.[ref]
Communal breeding in the mara, Dolichotis patagonum by A. B. Taber and D. W. Macdonald. Abstract, pair organization, warren membership and vigilance
An invented time-budget example shows why these measurements differ. Suppose each of two pairs watches during a different ten-minute interval: each pair watches for ten minutes, while the group has twenty minutes with a watcher present. If both watch simultaneously for ten minutes, individual effort is unchanged but collective coverage halves. Real coverage requires recording overlap, not merely adding individual durations. The field association between group size and survival motivates explanations involving predation; it does not by itself isolate a single cause.