WILD 3580 1st Edition Lecture 19Outline of Last Lecture I. Order CaudataII. Reproduction Outline of Current Lecture I. Order Gymnophiona II. Sensory Reception III. Reproduction Current LectureI. Order Gymnophiona - Caecilians - 170 species worldwide (not as diverse)- Terrestrial, fossorial (underground), or aquatic - Characteristics 1. Elongate body – wormlike 2. Limbs and limb girdles are absent- secondarily derived 3. Tails are absent or greatly reduced 4. Eyes are reduced – very little function other than light reception 5. May have two, one, or no lungs- skin serves less in respiration 6. Annuli- rings around the body (segmentation)a. Associated with vertebra II. Sensory Reception - Eyes: light reception- Tentacle: chemoreception - Lateral line system: in aquatic larvae III. Reproduction - Internal fertilization o Males have copulatory organ possibly a secondarily derived characteristics - Oviparous: lay eggs in water to hatch aquatic larvae o Some lay eggs on land- egg guarding by the female These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Ovoviviparous: eggs are retained in the oviduct before being borno Young are 30-60% of females length- Viviparous: most caecilians o Young is getting nourishment from the female via secretions from the oviduct walls o Teeth of young stimulate production of
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