Download - Chelicerata 2013
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CHELICERATA
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Chelicerata
-‐ Aranhas, escorpiões, ácaros, carrapatos;
-‐ Terrestres → aquáticos;
-‐ Corpo: Prossoma (cefalotórax) e Opistossoma (abdômen);
-‐ Antenas ausentes;
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Organização geral
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Organização geral
Corpo dividido: - Prossoma;
- Opistossoma;
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Organização geral
Prossoma: - Cefalotórax
Opistossoma: - Abdômen
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Organização geral
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Organização geral
Prossoma: - Olhos; - Quelíceras;
- Pedipalpos;
- Pernas;
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Organização geral
Prossoma: - Olhos → visão;
Quelíceras;
→ capturar presas
- Pedipalpos;
→ sensorial
→ manipular alimento
→ capturar presas
→ órgão copulador ♂
- Pernas;
→ locomoção;
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Organização geral
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Sistema nervoso
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Sistema nervoso
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Sistema circulatório
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Sistema respiratório
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Sistema digestivo
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Sistema digestivo
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Alimentação
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Sistema excretor
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Reprodução e desenvolvimento
-‐ Dióicos → partenogênese;
-‐ Fecundação interna → desenvolvimento direto;
-‐ Ovíparos ou vivíparos;
-‐ Sistemas complexos de corte;
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Reprodução e desenvolvimento
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Reprodução e desenvolvimento
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Reprodução e desenvolvimento
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Fonte: Lou
renç
o, 200
0
Reprodução e desenvolvimento
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Fonte: Lou
renç
o, 200
0
Reprodução e desenvolvimento
Espermatóforo
“Passeio a dois”
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Reprodução e desenvolvimento
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Fonte: Lou
renç
o, 200
0
Reprodução e desenvolvimento
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Cesta de nascimento
Reprodução e desenvolvimento
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Cesta de nascimento
Reprodução e desenvolvimento
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Reprodução e desenvolvimento
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Arachnida
Subfilo Chelicerata
Pycnogonida Merostomata
12
3 1. Cefalotórax e abdômen
2. Quelíceras e pedipalpos
3. 4 pares de pernas
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1. Aranhas-‐do-‐mar → marinhos (1.000 espécies);
2.Região intertidal até profundidades de 7.000 metros;
3. Tamanho → 1 cm até 60 cm de comprimento;
-‐ Pernas ovígeras → carregar ovos -‐ machos;
Classe Pycnogonida
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Ordem Eurypterida † (Escorpiões-‐marinhos)1.Marinhos → anfíbios ou semiterrestres;
2.Opistossoma dividido – mesossoma e metassoma;
-‐ Pterygotus → 3m de comprimento;
Classe Merostomata
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Ordem Xiphosura (Límulos)1.Marinhos → águas rasas de fundo arenoso;
2.Opistossoma não-‐segmentado – apêndices formando brânquias;
3. 5 espécies viventes -‐ “fósseis vivos”;
Classe Merostomata
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1. 60.000 espécies → 11 ordens;
2.Maior grupo dentro de Cheliceriformes;
3. Opistossoma segmentado ou não-‐segmentado;
4.Machos com pênis ausentes → exceto Opiliones;
Classe Arachnida
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1) Ordem Araneae (Aranhas) – 35.000 spp.
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Mygalomorphae Araneomorphae
Orthognatha Labidognatha
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Seda e teia
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Teia orbicularSeda e teia
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Espécies de importância médica no Brasil
Viúva-negra (Latrodectus)
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Aranha-Marrom (Loxoceles)
Espécies de importância médica no Brasil
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Espécies de importância médica no Brasil
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Aranha-armadeira (Phoneutria)
Espécies de importância médica no Brasil
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Caranguejeiras???
Espécies de importância médica no Brasil
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2) Ordem Scorpiones (Escorpiões) – 1.500 spp.-‐ Corpo dividido 3 regiões → Prossoma, mesossoma e metassoma;
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-‐ Queliceras e pedipalpos quelados – télson com gl. de veneno;
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Microtityus rickyi
Tamanho
Pandinus imperator
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Cutícula + UV
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Brotheas amazonicus (Chactidae) Tityus metuendus (Buthidae)
Espécies mais frequentes na região de Manaus
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Tityus serrulatus (Buthidae)Tityus metuendus (Buthidae)
Espécies de importância médica no Brasil
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3) Ordem Acari (Ácaros, carrapatos, micuins) – 30.000 spp.
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Carrapatos (Amblyomma, Ixodes)Ácaros de importância médico veterinária
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Ácaro da sarna ou Escabiose humana (Sarcoptes scabiei)
Ácaros de importância médico veterinária
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Sarna canina (Demodex canis)
Ácaros de importância médico veterinária
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Sarna canina (Demodex canis)
Ácaros de importância médico veterinária
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Cravo-do-rosto (Demodex folliculorum)
Ácaros de importância médico veterinária
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Micuim ou mucuim (Eutrombicula)
Ácaros de importância médico veterinária
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Ácaro-da-poeira (Dermatophagoides farinae)Ácaros de importância médica e veterinária
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Ácaros de importância agrícolaÁcaros fitófagos