pronunciation genus spiders family containing species occurring mexico southern united_states species distinguished rear portion males possess large spines pairs walking legs hold females mating like spiders create lid await passing insects prey species known male specimens species expected discovered closely related spiders genera description members reach body length including legs relatively large large spiders anterior body segment bearing eyes legs oval slightly longer wide slopes considerably rear viewed rear upper surface relatively soft distinctly lighter coloration devoid hairs species fringed black eyes elevated arranged rows rectangular area hind row slightly curved upwards bowl shallow anterior row slightly slightly curved downwards inverted bowl spiders colored shades brown males generally appearing dark reddish brown jaws dark brown abdomen dark brown upper surface measurements species refer variable abdomen recorded lengths range males 5th leg segments second walking legs swollen enlarged species additionally males possess prominent spines known mating second related genera possess pair legs size number arrangement spines varies species females double toothed groove unlike genus sexes possess rows stiff rear legs behavior like spiders species construct ground lid wait ambush passing prey prey studied species believed similar behavior consists branched tube lined silk soil ranging depth covered like lid composed silk soil silk remains prey include beetles ants adults juveniles found close proximity suggesting individuals disperse far hatching individuals texas disperse august january collected time mexico dispersal period extends june january habitat predominant habitat desert tropical dry forest mexico texas specimens collected elevations low sea level baja california species northeastern mexico located flat ground slight southern texas residential particularly likely encountered rains spiders generally difficult find wild rare museum collections predators texas thought preyed hawk genus known spiders provide food young observations suggest female seek hosts sting leaving paralyzed taxonomic history taxonomic history spiders includes nearly named species genera additional generic names considered taxonomic synonyms named species similarly determined synonyms previously described species genus established austrian naturalist description english zoologist reverend described new genera new species respectively shortly reverend nephew transferred rendering junior synonym similarly elder required change avoid confusion given replacement american biologist described new genus species texas stanley described texas species transferred taxonomic changes occurred revision american new species described named nearby indigenous peoples mexican historic figures species include nightclub cabo cabo san lucas character previously described declared dubious originally described based juvenile specimen unclear represents distinct species total valid species recognized species distribution different species distinguished differences body size limb proportions number spines shape female sperm geographic location species known male specimens known female specimens species distributed central northern mexico texas lower species known type locality site type specimen specimens originally collected species largest range bond assert species actually composed multiple unnamed cryptic species distinct species erroneously grouped require additional morphological genetic research distinguish classification type genus family spiders family considered subfamily classified subfamily earlier comparisons morphological traits suggested closest relative forest dwelling spider found arizona new_mexico recent studies including analyses dna similarities suggest closer relationship genus species ranging arizona texas mexico
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