# denton-test.ts output, run 2026-10-20T14:58:55.359Z
group	living_families_GBIF	no_fossil_record	oldest_record_pre_Pleistocene	oldest_record_Pleistocene_Holocene_only	straddles	any_record_%	pre_Pleistocene_%
Mammalia	201	35	151	15	0	82.6	75.1
Aves	283	112	97	68	6	60.4	34.3
Squamata	59	18	38	3	0	69.5	64.4
Testudines	14	1	13	0	0	92.9	92.9
Crocodylia	3	0	3	0	0	100.0	100.0
Amphibia	97	58	37	2	0	40.2	38.1
All land vertebrates	657	224	339	88	6	65.9	51.6
Excluding birds	374	112	242	20	0	70.1	64.7
# families whose oldest PBDB record is Pleistocene or Holocene only:
# Mammalia:Acrobatidae, Mammalia:Bradypodidae, Mammalia:Caluromyidae, Mammalia:Cheirogaleidae, Mammalia:Eupleridae, Mammalia:Furipteridae, Mammalia:Hesperomyidae, Mammalia:Hylobatidae, Mammalia:Indriidae, Mammalia:Lemuridae, Mammalia:Lepilemuridae, Mammalia:Macropoda, Mammalia:Myzopodidae, Mammalia:Solenodontidae, Mammalia:Tarsipedidae, Aves:Acanthizidae, Aves:Alcedinidae, Aves:Artamidae, Aves:Atrichornithidae, Aves:Bernieridae, Aves:Bombycillidae, Aves:Brachypteraciidae, Aves:Bucconidae, Aves:Cacatuidae, Aves:Calcariidae, Aves:Calyptophilidae, Aves:Campephagidae, Aves:Cardinalidae, Aves:Certhiidae, Aves:Chionidae, Aves:Cinclidae, Aves:Cinclosomatidae, Aves:Climacteridae, Aves:Coraciidae, Aves:Dasyornithidae, Aves:Dicaeidae, Aves:Dromadidae, Aves:Dulidae, Aves:Estrildidae, Aves:Furnariidae, Aves:Hirundinidae, Aves:Ibidorhynchidae, Aves:Laniidae, Aves:Leptosomidae, Aves:Locustellidae, Aves:Loriidae, Aves:Maluridae, Aves:Meliphagidae, Aves:Meropidae, Aves:Mesitornithidae, Aves:Mohoidae, Aves:Mohouidae, Aves:Monarchidae, Aves:Nectariniidae, Aves:Nesospingidae, Aves:Nyctibiidae, Aves:Oriolidae, Aves:Orthonychidae, Aves:Petroicidae, Aves:Phaenicophilidae, Aves:Phylloscopidae, Aves:Plataleidae, Aves:Pluvianidae, Aves:Polioptilidae, Aves:Prunellidae, Aves:Psophodidae, Aves:Pycnonotidae, Aves:Ramphastidae, Aves:Rhipiduridae, Aves:Rhynochetidae, Aves:Scotocercidae, Aves:Sittidae, Aves:Spindalidae, Aves:Sturnidae, Aves:Thinocoridae, Aves:Thraupidae, Aves:Tichodromidae, Aves:Tityridae, Aves:Troglodytidae, Aves:Upupidae, Aves:Vangidae, Aves:Vireonidae, Aves:Zosteropidae, Squamata:Gerrhosauridae, Squamata:Leptotyphlopidae, Squamata:Opluridae, Amphibia:Mantellidae, Amphibia:Odontophrynidae