Premise: Latrodectus . The genus contains 31 recognized species distributed worldwide , including the North American black widows ( L. mactans , L. hesperus , and L. variolus ) , the button spiders of Africa , and the Australian redback spider . Spider . They are the largest order of arachnids and rank seventh in total species diversity among all other orders of organisms . Males of most species survive a few matings , limited mainly by their short life spans . Females of many species care for their young , for example by carrying them around or by sharing food with them .
Hypothesis: There are different species of spiders.
Label: ENTAILMENT