BIOL1001 DICHOTOMOUS KEY LAB

Dichotomous Key Lab 1 – BIO1001 January 25th, 2021 Muhammad Jazil 215672165 1a. Eyes touch on top of head ………………………………………………………........... go to 2 1b. Eyes do not touch on top of head …………………………………………………..... go to 17 2a. Large (average length 65mm) with narrow abdomen............................…….. ………... go to 3 2b. Small (average length under 45mm) with a wide abdomen …………………………. go to 10 3a. Black and yellow markings on the abdomen ………………………………………….. go to 4 3b. No yellow markings on the abdomen …………………………………………………. go to 6 4a. Single thoracic stripe ……………………………. Swift river cruiser, Macromia illinoiensis 4b. Multiple thoracic stripes ……………………………………………………………..... go to 5 5a. Brown thorax with yellow blunt triangle like markings on the abdomen .................................. Brown spiketail, Cordulegaster bilineata 5b. Dark Brown thorax with a single row of yellow arrow shaped markings on the abdomen …… Arrowhead spiketail, Cordulegaster oblique 6a. Black and blue abdomen ………………………………………………………………. go to 7 6b. Brown abdomen ……………………………………………………………………….. go to 9 7a. Green thorax and green eyes …………………………………….. Green darner, Anax junius 7b. Black/brown thorax with blue thoracic stripes …..……………………………………. go to 8 8a. Blue eyes and face …………………………………... Blue-eyed darner, Aeshna multicolour 8b. Green eyes and face ………………………………. Lance-tipped darner, Aeshna constricta 9a. Abdomen is the same width the entire length and dark brown markings on wings …………… Prince baskettail, Epitheca princeps 9b. Abdomen width is narrow near the thorax and increases towards the appendage. Wings don’t have dark brown markings ……………………….. Racket-tailed emerald, Dorocordulia libera 10a. Wings have markings on them ……………………………………………………… go to 11 10b. Wings are clear; no markings ………………………………………………………. go to 15 11a. Red eyes and dark red/brown thorax ………………………………………………... go to 12 11b. Black eyes and black thorax and face ………………………………………………. go to 13 12a. Abdomen has heart shaped red markings. Wings have black markings with red veins ……... Calico pennant, Celithemis elisa 12b. Red abdomen with black underside and wings have brown markings ………………………. Band-winged meadowhawk, Sympetrum semicinctum 13a. White abdomen with black marking on the edge of the wings …............................................ White-tailed skimmer, Plathemis Lydia 13b. White abdomen with black and white markings on wings …………………………. go to 14 14a. Three black markings and two white markings per wing ……………………………………. Twelve-spotted skimmer, Libellula pulchella 14b. Two of markings per wing, one black and one white ...……………………………………… Widow skimmer, Libellula luctuosa 15a. Black abdomen and black thorax ………………………… Slaty skimmer, Libellula incesta 15b. Red abdomen and brown thorax ……………………………………………………. go to 16 16a. Brown eyes and white face …………… White-faced meadowhawk, Sympetrum obtrusum 16b. Brown eyes and brown face ………………… Autumn meadowhawk, Sympetrum vicinum 17a. Black abdomen and thorax with yellow markings ……..…………………………… go to 18 17b. Brown abdomen and green thorax ………… Rusty snaketail, Ophiogomphus rupinsulensis 18a. Abdomen has yellow ring markings and thorax has two thick yellow stripes on each side …. Zebra clubtail, Stylurus scudderi 18b. Thorax heavily striped with yellow. Yellow abdomen markings form a stripe pattern ……... go to 19 19a. Bright green eyes with a yellow face ………………... Dragonhunter, Hagenius brevistylus 19b. Blue eyes with a yellow face …………….. Twin-striped clubtail, Hylogomphus geminatus