Subphyla Myriapoda and Hexapoda lab notes

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Subphyla Myriapoda and Hexapoda lab notes

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Discusses structures and identifying characteristics of both subphyla. In depth Grasshopper dissection discussion, and all identifying taxonomic classification described.

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BIOL 3270
Zoology

PHYLUM ARTHROPODA
Subphyla Myriapoda and Hexapoda
All members of these subphyla possess mandibles (paired appendages on the third head segment that are
modified for chewing or grinding food).

Subphylum Myriapoda
Class Chilopoda (centipedes)

IDENTIFY
 number of legs per segment
 tergum (dorsal plate)
 poison claws (=forcipule; this is the first thoracic appendage)
 1st and 2nd maxilla
 eye
 sternite (ventral plate)
 antenna

Class Diplopoda (millipedes)

IDENTIFY
 number of legs per segment
 antenna
 eye
 first leg (on second segment)
 mandibular base
 gnathochilarium (the fused 1st and 2nd maxillae, this forms the lower surface of the oral chamber or
mouth)

, Subphylum Hexapoda
Class Insecta

Order Odonata (dragonflies and damselflies)
FEATURES
 Chewing mouthparts
 2 pairs membranous wings that cannot be folded against the body
 Well-developed eyes
 Predatory

Order Mantodea (mantids)
FEATURES
 First pair of legs modified for grasping and shredding prey (raptorial legs)
 Chewing mouthparts
 Only order that is able to rotate its head
 Forewings form tegmina

Order Orthoptera (grasshoppers, crickets, and katydids)
FEATURES
 Forewings leathery (tegmina)
 Hindwing membranous
 Chewing mouthparts

Lubber Grasshopper
External anatomy
 HEAD: ocelli, compound eye, antenna, mandible, maxilla, labial palps
 THORAX: legs, femur, tibia, tarsi, wings, pronotum
 ABDOMEN: terga, sterna, cerci, ovipositor, spiracles, tympanum

Internal anatomy
 Esophagus
 Crop
 Stomach
 Intestine
 Rectum
 Anus
 Ovaries or testes
 Eggs (if female)
 Heart
 Malpighian tubules
 Brain ventral nerve cord

Order Blattaria (roaches)

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Uploaded on: December 23, 2021
Number of pages: 5
Written in: 2021/2022
Type: Class notes
Professor(s): David stasek
Contains: All classes

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