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F.T. Kützing introduced Cocconeis molesta with only an uninformative description and a poor illustration: C. molesta has small, oblong valves and is an epiphyte. Another species, Cocconeis diaphana, described by William Smith, is said to have larger valves than C. molesta, with frustules that are relatively oblong. Smith described two forms: one with a distinct fascia on its raphe valve (var. β), the other without this feature. A third species, Cocconeis dirupta was described by Gregory, who expressed doubts that it differed from C. diaphana. Finally, Cocconeis molesta var. crucifera Grunow was first introduced in Van Heurck’s Atlas but was subsequently treated by Van Heurck as a synonym of C. molesta. No previous account has examined the type material of these species. In this paper, we undertake that task and examine type slides and raw material in order to discriminate these different taxa. We conclude by recognizing three species: Cocconeis molesta Kütz., C. diaphana W.Sm. and C. dirupta W.Greg. Cocconeis diaphana var. β is considered to be a synonym of C. dirupta and C. molesta var. crucifera is considered to be a synonym of C. molesta. Lectotypes are designated for C. diaphana and C. dirupta.
Examination of the L. Koch collection of the Zoological Museum in Berlin allows us to propose the following new synonyms and combinations: Erigone marina L. Koch, 1882 = Oedothorax fuscus (Blackwall, 1834) n. syn.; Theridion elimatum L. Koch, 1882 = Enoplognatha diversa (Blackwall, 1859) n. syn.; Liocranum variabilis Wunderlich, 2008 = Zora inornata L. Koch, 1882 n. syn. = Liocranum inornatum n. comb.; Lycosa perspicax L. Koch, 1882 = Arctosa fulvolineata (Lucas,1846) n. syn.; Alopecosella Roewer, 1960 = Arctosa C. L. Koch, 1847 n. syn.; Lycosa subhirsuta L. Koch, 1882 = Arctosa lacustris (Simon, 1876) n. syn.; Philodromus vegetus L. Koch, 1882 = Thanatus vulgaris Simon, 1870 n. syn.; Ozyptila bicuspis Simon, 1932 = Ozyptila furcula L. Koch, 1882 n. syn.; Haplodrassus maroccanus Denis, 1956 = Drassus parvulus L. Koch, 1882 n. syn. = Haplodrassus parvicorpus (Roewer, 1951) n. comb. (replacement name); Zelotes ruscinensis Simon, 1914 = Zelotes semirufa (L. Koch, 1882) n. syn.; Phlegra simoni L. Koch, 1882 = Phlegra bresnieri Lucas, 1846 n. syn.; Trochosula conspersa (L. Koch, 1882), Lycorma fraisnei (L. Koch, 1882), Lycorma insulana (L. Koch, 1882), Arctosa misella (L. Koch, 1992) and Pirata simplex (L. Koch, 1882) are all retransferred to their original genus Lycosa stat. rev. Cheiracanthium occidentale L. Koch, 1882, Ozyptila furcula L. Koch, 1882 and Zelotes callidus (Simon, 1878) are redescribed.