Table 2 in A new freshwater crayfish species of Parastacus Huxley, 1879 (Malacostraca: Decapoda: Parastacidae) from southern Brazil

Table 2. Main characters distinguishing Parastacus longidactylus sp. n. from other species of Parastacus cited in the Remarks. Asterisk (*) indicates variations in species of comparative material. For abbreviations, see Material and Methods. CharactersP. brasiliensisP. buckupiP. gomesaeP. guapoP.longidactylus sp. n.P. macanudoP. promatensisRostrumShapeTriangular or spatulatedTriangularTriangularTriangularTriangularTriangularSubtriangularApexRounded, ending in an upward spineRounded, ending in an upward spineRounded and smooth*Rounded, ending in an upward spineRounded, ending in a straight blunt spineRounded, ending in a tiny straight blunt spine*Acute, ending in a short and depressed spine.Dorsal SurfaceConcaveStraightStraight with a slightly concave in the anterior portionStraightStraightStraightFlatEyesSmallSmallSmall*SmallLargeSmallSmallRostral carinaSurpassing the rostral basisSurpassing the rostral basisSurpassing the rostral basisSurpassing the rostral basisSurpassing rostral basis and extending almost to the middle of postorbital carinaeSurpassing the rostral basisSurpassing the rostral basisSuborbital angle=90°=90°>90° *>90°*=90°>90°=90°Postorbital carinaWeakly prominentWeakly prominentProminent in anterior and middle portionsProminent in anterior and middle portionsProminentWeakly prominentProminentCervical grooveWeakly V-shapedWeakly V-shapedWeakly V-shapedWeakly V-shapedWeakly V-shapedWeakly V-shapedU-shapedEpistomeAnteromedian lobePentagonalPentagonalSeptagonalPentagonalSeptagonalPentagonalPentagonalMandibleIncisor processNine teeth (the third tooth from the anterior margin is the largest)Ten teeth (the fourth tooth from the anterior margin is the largest)Seven teeth (the second tooth from the anterior margin is the largest)Nine teeth (the third tooth from the anterior margin is the largest)*Ten teeth (the third tooth from the anterior margin is the largest)Nine teeth (the second tooth from the anterior margin is the largest)Nine teeth (the third tooth from the anterior margin is the largest)Caudal molar processBicuspidateUnicuspidateBicuspidateBicuspidateBicuspidateBicuspidateBicuspidate