{"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":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0001257483,0.00008259728,0.0001182348,0.00003196005,0.0002614121,0.00001906172,0.0001304924,0.00009870005,0.00005319135],"category_scores_gemma":[0.0001022708,0.00005587587,0.00004090835,0.0002240283,0.0001177296,0.00002261725,0.00003395074,0.00015449,0.0001637016],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00005442513,"about_ca_system_score_gemma":0.00006389351,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0001161319,"about_ca_topic_score_gemma":0.00004070637,"domain_scores_codex":[0.9994224,0.0000127048,0.0001360148,0.0001753165,0.00007328686,0.0001803025],"domain_scores_gemma":[0.9994459,0.0001285131,0.00003203275,0.0002981165,0.00005259208,0.00004283366],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"not_applicable","study_design_gemma":"not_applicable","study_design_scores_codex":[0.00008924583,0.0001755698,0.07435095,0.00002962851,0.0001420595,0.000006253126,0.00008395848,0.000002683905,0.01639429,0.007166172,0.8915603,0.00999887],"study_design_scores_gemma":[0.0004991981,0.00004443724,0.09502522,0.00003711989,0.00006933143,0.000006186437,0.00002594667,0.0004079515,0.01293153,0.0006574253,0.8902313,0.00006435037],"study_design_candidate":"not_applicable","study_design_consensus":"not_applicable","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9274368,0.003465911,0.0005121417,0.0540161,0.0003104522,0.0006298432,0.00006476131,0.000271171,0.01329285],"genre_scores_gemma":[0.9820373,0.0003033173,0.0003266604,0.0007028626,0.00005912408,0.0001014254,0.0001175166,0.000008384814,0.01634341],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.05460053,"threshold_uncertainty_score":0.2278552,"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."}}