| gptkbp:instanceOf | gptkb:state_order 
 | 
                        
                            
                                | gptkbp:bloodContains | hemocyanin 
 | 
                        
                            
                                | gptkbp:bloodUsedFor | bacterial endotoxin detection 
 | 
                        
                            
                                | gptkbp:bodyPlan | prosoma and opisthosoma 
 | 
                        
                            
                                | gptkbp:class | gptkb:Merostomata 
 | 
                        
                            
                                | gptkbp:closelyRelatedTo | arachnids 
 | 
                        
                            
                                | gptkbp:commonName | horseshoe crabs 
 | 
                        
                            
                                | gptkbp:conservationStatus | threatened 
 | 
                        
                            
                                | gptkbp:describedBy | gptkb:Latreille 
 | 
                        
                            
                                | gptkbp:describedYear | 1802 
 | 
                        
                            
                                | gptkbp:diet | carnivorous scavenger
 
 | 
                        
                            
                                | gptkbp:distribution | gptkb:Atlantic_Ocean gptkb:Indo-Pacific_region
 
 | 
                        
                            
                                | gptkbp:eggUse | biomedical industry 
 | 
                        
                            
                                | gptkbp:extinctFamilies | gptkb:Limulidae Austrolimulidae
 Belinuridae
 Moravuridae
 Paleolimulidae
 Rolfeiidae
 Xiphosuridae
 
 | 
                        
                            
                                | gptkbp:firstAppearance | gptkb:Ordovician_period 
 | 
                        
                            
                                | gptkbp:fossil | extensive 
 | 
                        
                            
                                | gptkbp:habitat | marine environments 
 | 
                        
                            
                                | gptkbp:kingdom | gptkb:Animalia 
 | 
                        
                            
                                | gptkbp:larvalStage | trilobite larva 
 | 
                        
                            
                                | gptkbp:notableSpecies | gptkb:Carcinoscorpius_rotundicauda gptkb:Limulus_polyphemus
 gptkb:Tachypleus_gigas
 gptkb:Tachypleus_tridentatus
 
 | 
                        
                            
                                | gptkbp:numberOfSpecies | gptkb:Carcinoscorpius_rotundicauda gptkb:Limulus_polyphemus
 gptkb:Tachypleus_gigas
 gptkb:Tachypleus_tridentatus
 4
 
 | 
                        
                            
                                | gptkbp:phylum | gptkb:Arthropoda 
 | 
                        
                            
                                | gptkbp:reproduction | external fertilization 
 | 
                        
                            
                                | gptkbp:subfamily | gptkb:Chelicerata 
 | 
                        
                            
                                | gptkbp:tailStructure | telson 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Horseshoe_crabs gptkb:Merostomata
 gptkb:Chasmataspidida
 
 | 
                        
                            
                                | gptkbp:bfsLayer | 8 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Xiphosura 
 |