Exam (elaborations)
BSPM 102 Exam 2 Study Guide Questions & Detailed Answers
- Course
- BSPM 102
- Institution
- Colorado State University
BSPM 102 Exam 2 Study Guide Questions & Detailed Answers
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BSPM 102 Exam 2 Study Guide Questions &Detailed Answers
Physical features of opiliones (daddy longlegs) - ANS Globular body without
distinct regions (cephalothorax/abdomen appear fused)
4 pairs of legs (most species have long, spindly legs; front pair not used for
walking-used for sensory)
2 eyes, mounted on a large dorsal tubercle
Weak jaws-tear food with chelicerae and mix with digestive fluids
No poison glands
Most have scent glands above the first or second coxae (repugnatorial glands-
repulsive fluids)
Silk production is absent
Molting very complicated
Life history and habits of opiliones - ANS Food: dead, dying insects (usually small,
soft) and plant juices
Females lay eggs via a long eversible ovipositor (bury eggs in soil, under tree bark,
or into plant stems)
Females have bigger bodies, with shorter legs
One year life cycle-mature in late summer
Defenses of opiliones - ANS Lose legs
,Ability to produce gross liquid
Aggregate in dark places
Appendotomy of opiliones - ANS May readily lose legs when confronted by
predator
Can alter gait accordingly
Physical features of scorpiones (scorpions) - ANS 4 pairs of legs
Segments of mouthparts:
-Chelicerae (jaws, used to tear)
-"Elaborated" claw-like chelae (pedipalps, prey
capture)
Stinger: defense, located on abdomen
Life history and habits of scorpiones - ANS Mating and development:
-Complicated dance that may last for hours
-Young born alive
-1st pair of legs becomes a "birth basket"
-Stay on the female through the first molt
-Average litter size about 2 dozen (6-100+)
-Time to develop may take 6-83 months
-Some species may live 20-25 years
, Feeding:
-Crush to allow sucking of fluids by chelicerae
-Grab prey with claw-like pedipalps (chelae)
-Stinger rarely used for food capture
-Almost exclusively used for defense
Medical importance of scorpiones - ANS Only about 20-25 species considered
medically important
Most produce sting similar to a wasp/bee sting
All poisonous species in family Buthidae (no poisonous species in Colorado)
-North Africa: fat-tailed scorpions
-North America: Arizona bark scorpion
Physical features of solifugae (sunspiders/windscorpions) - ANS Feed by tearing up
their prey with chelicerae
-Chelicerae (jaws) are large, powerful
Leglike pedipalps (chelae)
-Sensory
-Used to manipulate prey
-Allow climbing (small hooks at tips)
Fast moving
No poison glands have been identified
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