Table 1. Main differential characters between M in The second Mecistocephalus centipede without a spiculum: Mecistocephalus aspiculus sp. n. from south China (Chilopoda: Geophilomorpha: Mecistocephalidae)

Table 1. Main differential characters between M. aspiculus Jiang and You, sp. n. and M. yanagiharai Takakuwa, 1936. Character states of M. yanagiharai are based on the description and reference pictures published by Uliana et al. (2007) and Takakuwa (1936a).
Mecistocephalus yanagiharaiMecistocephalus aspiculusSpeciesTakakuwa, 1936Jiang and You, sp. n.Clypeus: width/length1.21.6Clypeus: areolate part length/non-1.450.45areolate (plagulae) part lengthSensilla of clypeal plagulaeAbsentPresentLabral mid-piece: shape of posteriorSub-fusiformInverted triangularmarginLabral side-piece: shape of anteriorAlmost straight, with external marginsSinuous, with external marginsmarginslightly convergent backwardsevidently convergent forwardsLabral side-piece: shape of posteriorStraightConvex close to the internal andmarginexternal endsAdditional sclerite on the external ofAbsentPresent (comma-shaped)side-pieceFirst maxillary coxal projection: shapeClavate, sub-triangularSub-trapezoidof distal lobeArticle I of second maxillary4.54telopodite: length/width