BIO 202 - Animal Biodiversity - Lecture 8

Flashcards based on lecture notes for animal biodiversity, covering topics such as Ecdysozoa, Nematoda, Arthropoda, and Crustacea.

Clade Ecdysozoa

Animals that molt a cuticle; includes both coelomate and pseudocoelomate phyla.

Cuticle

Outer body covering that is molted in Ecdysozoa.

Phylum Nematoda

Phylum containing roundworms.

Pseudocoel

Pressurized body cavity in nematodes.

Writhe

Characteristic movement of nematodes due to longitudinal muscles.

Swallow food

Nematodes must do this because their cuticle is a barrier.

Elephantiasis

Parasitic disease caused by filarial worms, leading to swelling.

Caduceus

Staff of Hermes

Distinguishing Characteristic(s) of Nematoda

Elastic cuticle, hydrostatic skeleton, only longitudinal muscles, writhe

Phylum Arthropoda

Largest phylum in the animal kingdom characterized by a thick cuticle used as an exoskeleton.

Ecdysis

The molting process in arthropods.

Tagmata

Head, thorax, abdomen

Cuticle Layers

Chitin, Protein, CaCO3 and Wax

Inside-out

Arthropod limb movement is from the _.

Apodemes

Appendages coming from 'jointed limb'

Blood system in arthropods

Open

Crustaceans

Insects are…

6 pairs of appendages in Chelicerata

Chelicerae, pedipalps, 4 walking legs

Things subphylum Chelicerata lack

No mandibles, No antennae on first segment, No appendage for sperm delivery

Marine Classes included in Chelicerata

Horseshoe crabs and Sea spiders

Terrestrial Class Arachnida

Spiders, Scorpions, Ticks and mites

Characteristics of Arachnida

Specialized abdominal appendages, production and manipulation of silk, parachuting juveniles enhances dispersal

Class Chilopoda

Centipedes

Class Diplopods

Millipedes

Subphylum Crustacea important component

Marine ecosystems

Cephalothorax and abdomen

Two tagmata of subphylum crustacea

Nauplius

Larva in most primitive forms

Crustacean Classes

Classes Branchiopoda, Ostracoda, Maxillopoda, Malacostraca.

Subphylum Crustacea Characteristics

Two pairs of antennae, biramous appendages, mandibles

Insecta characteristics

Mandibles, one pair of antennae, uniramous appendages

Insecta tagmata

Head, thorax, abdomen

Insecta development

Hemimetabolous v. Holometabolous

Hemimetabolous

Gradual metamorphosis