| Lotagnostus 
 Temporal range:  | 
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| Scientific classification | 
| Domain: | Eukaryota | 
 
| Kingdom: | Animalia | 
 
| Phylum: | Arthropoda | 
 
| Class: | †Trilobita (?) | 
 
| Order: | †Agnostida | 
 
| Family: | †Agnostidae | 
 
| Genus: | †Lotagnostus Whitehouse, 1936
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| Species | 
| L. americanus Billings, 1860L. asiaticus Troedsson, 1937L. attenuatus Rusconi, 1955L. clarki Taylor, Loch & Repetski, 2024L. ergoides Shergold, 1972L. germanicus Matthew, 1901L. hedeni Troedsson, 1937L. irretinus Shergold, 1975L. matthewi Westrop & Landing, 2017L. obscurus Palmer, 1955L. peladensis Rusconi, 1951L. punctuatus Lu, 1964L. salteri Westrop & Landing, 2017L. spectabilis? Xiang & Zhang, 1985L. trisectus Salter, 1864 (type)
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| Synonyms | 
| Agnostus americanus - synonym of L. americanusAgnostus hedeni - synonym of L. hedeniAgnostus trisectus - synonym of L. trisectusAgnostus trisectus germanicus - synonym of L. germanicusLotagnostus spectabilis? - synonym of L asiaticus
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Lotagnostus is a genus of very small trilobites in the order Agnostida, which lived on the outer continental shelves worldwide, during the late Upper Cambrian. It was described by Whitehouse in 1936, and the type species is Lotagnostus trisectus, which was originally described as a species of Agnostus by Salter in 1864.