Molecular analyses of groundwater amphipods (Crustacea: Niphargidae) from Luxembourg: new species reveal limitations of morphology-based checklists Author Weber, Dieter 0000-0001-7813-842X dieter. weber 124 @ gmx. de; https: // orcid. org / 0000 - 0001 - 7813 - 842 X dieter.weber124@gmx.de Author Flot, Jean-François Interuniversity Institute of Bioinformatics in Brussels- (IB), Brussels, Belgium Author Frantz, Alain C. 0000-0002-5481-7142 alain. frantz @ mnhn. lu; https: // orcid. org / 0000 - 0002 - 5481 - 7142 alain.frantz@mnhn.lu Author Weigand, Alexander M. University of Duisburg-Essen, Universitätsstr. 5, D- 45141 Essen, Germany text Zootaxa 2022 2022-12-23 5222 6 501 533 journal article 10.11646/zootaxa.5222.6.1 1175-5326 7477397 C9D6A84D-9961-4062-ACF0-CAF3CDE2AA7F

TABLE 9. Relevant morphological characters of Niphargus puteanus and Niphargus virei in comparison to the specimen drawn by Hoffmann (1963) determined as N. virei.

	N. puteanus	N. virei	Hoffmann (1963)
Size in mm	10–22	about 35	30–33
Coxal plate IV	not longer than V	longer than V	longer than V
Spines on the dactylus of the gnathopods	5–8	2–10	1
Epimeral plate 3, angle at posterior edge	80°–120°	90°	90°
Uropod I internal branch:external branch	1.2–2	1.2–1.35	1.25
Telson length:width	0.86–1.05	1.2–1.25	1
End spines of telson	3	4–5	5
End spines:telson	0.33–0.53	0.25–0.44	0.22