An integrated conch-character analysis resolves relationships within sampled Hildoceratidae; this family-level result supplies an Ammonitida case study rather than an order-wide tree or range.
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References / paperThe phylogeny of Hildoceratidae (Cephalopoda, Ammonitida) resolved by an integrated coding scheme of the conch
Bardin, J.; Rouget, I.; Cecca, F.
Year2017
Source roleprimary-study
DOI / ID10.1111/cla.12151
Fitness and scope
taxonomy · topology · morphology · range
Integrated conch-character matrix for 105 Early Jurassic Hildoceratidae taxa; it supports that family study window rather than the order’s complete history.
Claim ledger
Bardin et al. analyze a 105-taxon Early Jurassic Hildoceratidae matrix, supporting a 201.4–174.7 Ma period envelope for that sampled ammonitid family rather than the complete Ammonitida range or a Cretaceous extinction endpoint.
claim:taxon:ammonitida:source-bounded-range-rc50