三分头虫
三分头虫（学名：Trimerocephalus），又名三分虫，是生存于泥盆纪法门期的一属三叶虫，生活在深海的底层。牠们没有眼睛，也没有颊刺，头甲短小。肋部宽阔，末梢往下翻转。[4]
三分头虫属 化石时期：
| |
|---|---|
| |
| 两个Trimerocephalus interruptus的头甲化石 | |
科学分类 
| |
| 界： | 动物界 Animalia |
| 门： | 节肢动物门 Arthropoda |
| （未分级）： | †类肢类 Artiopoda |
| 纲： | †三叶虫纲 Trilobita |
| 目： | †镜眼虫目 Phacopida |
| 科： | †镜眼虫科 Phacopidae |
| 属： | †三分头虫属 Trimerocephalus M'Coy, 1849 |
| 模式种 | |
| Trimerocephalus mastophthalmus Reinh. Richter, 1856
| |
| 异名 | |
|
Eutrimerocephalus | |
物种
- Trimerocephalus caecus (Gürich, 1896) 异名 Phacops caecus
- Trimerocephalus chopini Kin & Blazejowski, 2013
- Trimerocephalus cryptophthalmoides (Maksimova, 1955) 异名 Phacops cryptophthalmoides
- Trimerocephalus dianopsoides Osmólska, 1963
- Trimerocephalus interruptus Berkowski, 1991
- Trimerocephalus lacunosus (Pfeiffer, 1959) 异名 Phacops lacunosus
- Trimerocephalus lelievrei Crônier & Feist, 1997
- Trimerocephalus lentiginosus (Maksimova, 1955) 异名 Phacops lentiginosus
- Trimerocephalus mastophthalmus Reinh. Richter, 1856 异名 Phacops mastophthalmus, Trinucleus laevis
- Trimerocephalus mimbi Feist, McNamarra, Crônier & Lerosey-Aubril, 2009
- Trimerocephalus nigritus Crônier, 2003
- Trimerocephalus polonicus Osmólska, 1958
- Trimerocephalus procurvus Arbizu, 1985
- Trimerocephalus shotoriensis Feist, Yasdi & Becker, 2003
- Trimerocephalus sponsor Chlupač, 1966
- Trimerocephalus steinachensis (Richter & Richter, 1926) 异名 Phacops steinachensis
- Trimerocephalus tardispinosus Feist & Becker, 1997
- Trimerocephalus trifolius (Osmólska, 1958) 异名 Dianops trifolius
- Trimerocephalus vodorezovi (Maksimova, 1955) 异名 Phacops vodorezovi
参考文献
- ^ Crônier, C. Systematic relationships of the blind phacopine trilobite Trimerocephalus, with a new species from Causses−et−Veyran, Montagne Noire (PDF). Acta Palaeontologica Polonica. 2003, 48 (1): 55–70 [4 November 2013]. （原始内容存档 (PDF)于2017-03-13）.
- ^ Feist, R.; McNamara, K.J.; Crônier, C.; Lerosey-Aubril, R. Patterns of extinction and recovery of phacopid trilobites during the Frasnian-Famennian (Late Devonian) mass extinction event, Canning Basin, Western Australia (PDF). Geological Magazine. 2009, 146 (1): 12–33 [5 November 2013]. doi:10.1017/s0016756808005335.[永久失效链接]
- ^ Kin, A.; Blazejowski, B. A new Trimerocephalus species (Trilobita, Phacopidae) from the Late Devonian (Early Famennian) of Poland (PDF). Zootaxa. 2013, 3626 (3): 345–355 [2017-12-03]. doi:10.11646/zootaxa.3626.3.3. （原始内容存档 (PDF)于2019-07-24）.
- ^ Walker, Cyril; Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 63. ISBN 0789489848.