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4. 寄生線蟲的重要種類有哪些? 5. 簡述蛔蟲的生活史。 , 蛔蟲等寄生種類 ,給人類帶來危害 。 78 原腔動物門小結(jié) 七大類群形態(tài)差異很大 ,但具有下列共同特征: , 體壁和消化道之間出現(xiàn)原體腔 , 腔內(nèi)充滿體腔液 。 75 76 77 四、棘頭 動物 ? 500余種 , 均為寄生種類 。 常見如 鐵線蟲 。 ? 一類很小的多細胞動物 , 長 米 , 體長形 , 背部隆起 , 有許多棘或鱗片 , 腹面扁平 , 有纖毛 。 孤雌生殖:成熟雌體產(chǎn)的卵不經(jīng)受精,就 能發(fā)育為新個體的生殖方式。 小麥粒線蟲 49 50 松材線蟲 ( Bursaphelenchus xylophilus) 51 松材線蟲 52 53 54 55 56 Globodera sp. 胞囊線蟲 57 58 Myloidogina sp. 根結(jié)線蟲 59 四 . 昆蟲病原線蟲 60 A D 1 Fig. 1. SEM photographs of males of Heterorhabditisloide chongmingensis gen. nov., sp. nov. (A) Head of a male showing six labial papillae (l) and amphidial opening(a). (B)–(F) Posterior region in male showing different views showing bursal papillae (1,2,3,4,5,6,7,8,9) in shape and position, small papillae on posterior edge of cloaca (arrows), tail tip (t), and spicules(s). Scale bars: (A) 10 μm, (B) 20 μm, (C) 10 μm, (D) 20 μm, (E) 10 μm, (F) 10 μm. 1 2 7 3 9 8 4 5 6 D a a l A 7 2 3 4 5 6 t C 8 9 7 E 2 1 3 4 5 6 7 8 9 5 1 2 3 4 6 7 9 8 D s F 3 4 5 6 S 1 2 3 5 6 8 9 4 7 B Heterorhabditisloide chongmingensis gen. nov., sp. nov. 61 C A . Comparison of vulva pattern and tail of hermaphroditic and amphimictic under light microscope. (A) and (B) Lateral view of vulva of hermaphroditic and amphimictic female, note that vulva of hermaphroditic female slightly protruding and vulva of amphimictic female covered with exudates or copulation plug after mating. (C) Tail of amphimictic. (D) Tail of hermaphroditic female. Scale bars: (A) 20 μm, (B) 21 μm, (C) and (D) 20 μm. B D 62 Fig. 11. Galleria mellonella larvae uninfected and infected by Heterorhabditisloide chongmingensis gen. nov., sp. nov. with its symbiotic bacteria DZ0503SBS1. uninfected infected 63 Fig. 14. The symbiotic bacteria of Heterorhabditisloide chongmingensis gen. nov., sp. nov. (A) A red pigment of strain DZ0503SBS1 on NBTA plate. (B) A blue pigment on NBTA plate. (C) A red pigment on LB plate and its motili