spider horn latin genus spiders family south_america containing seven species occur predominantly high elevation semi desert regions chile argentina individuals relatively large spiders measuring body length genus refers characteristic pointed projection eyes jaws males species broken tips male found females means sperm competition possesses traits suggest relatively primitive member classified similar soft bodied spiders subfamily description species range body length tip end abdomen excluding legs yellow color ranges long body length depending species possesses central grey patch lines eyes abdomen white dark patterns dorsal surface species pair dark lines underside body covered dense covering long stiff hairs legs long slender yellow eyes roughly equal size arranged roughly triangular groups eyes meeting middle forming wide bow tie pattern species considered soft bodied abdomen lacks hardened plates occur spiders abdomen possesses males females differences morphology male jaws longer slender females male penultimate segment enlarged compared females males possess horn forward pointing projection surrounded long stiff hairs genus horn latin derives males sperm transferring organ tip terminates narrow curving tip called bears hook base accompanied similar curved extension called translucent reproduction like spiders mature males end terminating thin curved projection called sperm released mating observed broken tips lodged type sperm plug plug breaking piece anatomy process known male physically males successfully mating female types sperm competition animals alternative sperm competition function allow males rapidly escape avoid mating function thought unlikely significant size differences sexes common females larger males sperm types including gelatinous substances observed spider families generally thought ensure spiders known suspected utilize sperm habitat species found elevations sea level semi desert regions collected central chile spiders hard detect field species collected trapping uncommon museum collections known natural history species distribution genus established encompass newly described species species argentina previously described species seventh species described type species species occur central northern chile western argentina argentina western argentina northwestern argentina central northwestern central northern chile classification member family spiders contains species worldwide classified subfamily contains soft bodied genera certain features eyes jaws resemble found families differently modified suggested primitive basal members study examined dna similarities finding diverged
Unicorn (spider)