taxonID	type	description	language	source
1A0F646BFFE30415FEFDE4D24809FBD2.taxon	description	Z o o b a n k r e g i s t r a t i o n: u r n: l s i d: zoobank. org: act: 6 F 75400 B- 1 B 3 F- 4 B 71 - 8351 - 5839 C 233019 F Holotype: Naturalis Biodiversity Center, ZMA V. Pl. 976.4, Arroyo Sauce, near Sauce, Departamento Canelones, near Montevideo, Uruguay, 1 – 3 January 1987, sagittal sections on six slides. Etymology: The specific epithet is based on the Latin adjective clandestinus, secret, concealed, and alludes to the fact that it concerns a ‘ hidden’ sibling species. Differential diagnosis: A species of Girardia with low triangular head with bluntly pointed tip and short, broad auricles. Dorsal body coloration variable, being of a reticulated type with darkish spots and also a pair of dark stripes, separated by a pale mid-dorsal streak or composed of a dark background interspersed with white splotches and with a pale mid-dorsal line, or variations on these two major patterns. Reproductive complex basically as in G. tigrina: the only consistent anatomical difference between the two species residing in the coat of muscles around the bursal canal. In North American G. tigrina, this coat of muscles is simple, consisting of a thin subepithelial layer of circular muscle, followed by an equally thin layer of longitudinal muscle fibres. In contrast, G. clandestina possesses a bursal canal musculature that consists of a well-developed coat of intermingled circular and longitudinal muscle fibres.	en	Benítez-Álvarez, Lisandra, Sluys, Ronald, Leal-Zanchet, Ana María, Leria, Laia, Riutort, Marta (2023): First molecular phylogeny of the freshwater planarian genus Girardia (Platyhelminthes: Tricladida) unveils hidden taxonomic diversity and initiates resolution of its historical biogeography. Zoological Journal of the Linnean Society 197 (1): 1-19, DOI: 10.1093/zoolinnean/zlac065, URL: http://dx.doi.org/10.1093/zoolinnean/zlac065
