Black Widow Spider Classification

 Scientific Name: Latrodectus sp.

 Common Name: Black Widow Spider

Latin Meaning: “Biting in secret” The spider got its name from the belief that the female consumes the male after mating thus making her a widow, the black part comes from the black color of the spiders body.  

      Domain- Eukarya

                Kingdom- Animalia

                        Phylum- Arthropoda


                                        Order- Araneae

                                                 Family- Theridiidae

                                                        Genus- Latrodectus

                                                                Species- Latrodectus sp.  

black widow spider, Latrodectus mactans  (Araneae: Theridiidae) - 1225022

Figure 1. Female Black Widow Spider.

Latrodectus sp. is part of the Eukarya domain because it is multi-cellular. It is a part of the Animalia kingdom because the black widow spider has tissues and is heterotrophic. It is part of the Arthropoda phylum because of its segmented body and jointed exoskeleton. The black widow spider is part of the Arachnida class due to the cephalothorax and abdomen. It is in the Araneae order because of its external segmentation and respiratory system of book lungs or tracheae. The black widow spider is part of the Theridiidae family because it uses sticky capture silk to build its webs rather than woolly silk. It is the in the Latrodectus genus because of the neurotoxin latrotoxin that the females uses to bite and prey on insects and male black widow spiders. There are 32 species of Latrodectus sp. and the three main ones in North America are L. mactans, L. hesperus, and L. variolus.