{"id":"W4414708299","doi":"10.7717/peerj.19962","title":"The first leech body fossil predates estimated hirudinidan origins by 200 million years","year":2025,"lang":"en","type":"article","venue":"PeerJ","topic":"Leech Biology and Applications","field":"Medicine","cited_by":3,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Toronto","funders":"Natural Sciences and Engineering Research Council of Canada; Smithsonian Institution","keywords":"Sucker; Annelid; Leech; Clade; Vertebrate; Phylogenetic tree","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.00042101,0.0003448382,0.0002904379,0.001011806,0.001282142,0.0006424243,0.0003518949,0.0005763455,0.006704927],"category_scores_gemma":[0.0009808821,0.0001745863,0.0002055003,0.000778587,0.001125316,0.0007991551,0.0009895491,0.0005058274,0.001371481],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0004416792,"about_ca_system_score_gemma":0.0007307485,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.004727447,"about_ca_topic_score_gemma":0.01551203,"domain_scores_codex":[0.9997663,0.0000264942,0.00001503255,0.00008393974,0.0000673553,0.0000409601],"domain_scores_gemma":[0.9995835,0.00006564549,0.0001350999,0.00003810827,0.00011512,0.00006251415],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0009475733,0.00004474229,0.4658172,0.002282906,0.0004909807,0.004702498,0.008650159,0.0009053261,0.1138418,0.01148223,0.01374309,0.3770914],"study_design_scores_gemma":[0.00003846694,0.0002400378,0.6571509,0.0004970158,0.000357295,0.004909507,0.003217975,0.0007495637,0.01676305,0.002207555,0.3137887,0.0000799919],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9328768,0.02783451,0.009816337,0.001542359,0.0008092349,0.00005335426,0.001702591,0.0008138192,0.02455113],"genre_scores_gemma":[0.9824415,0.004784551,0.004075065,0.0002640653,0.0002210535,0.00001888337,0.001255785,0.0001210969,0.00681807],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.006704927,"threshold_uncertainty_score":0.02243024,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.01171575826698088,"score_gpt":0.3070863071308966,"score_spread":0.2953705488639157,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}