MATTONI Camilo Ivan
Comparative anatomy of the mesosomal organs of scorpions (Chelicerata, Scorpiones), with implications for the phylogeny of the order
VOLSCHENK, E. S., C. I. MATTONI & L. PRENDINI
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
Lugar: London, UK; Año: 2008 p. 651 - 651
We present a review and reassessment of anatomical variation in the ovariuterus (andassociated follicles), digestive gland, and lateral lymphoid organs of scorpions, anddiscuss the contribution of these character systems to the understanding of scorpionphylogeny. New data, obtained using light microscopy, are presented from anexamination of 55 scorpion species, representing all scorpion families, and collatedwith observations from the literature. Six distinct types of ovariuterine anatomy areidentified, five in the family Buthidae and one in the remaining (nonbuthid) families.The buthid genera Lychas C.L. Koch 1845 and Rhopalurus Thorell 1876 areexceptional in possessing multiple types of ovariuterine anatomy among thecongeneric species studied. The presence or absence of lateral lymphoid organsappears to be phylogenetically informative; the organ is absent in buthids, chaerilidsand Pseudochactas Gromov 1998. Digestive gland morphology appears to bephylogenetically informative within the superfamily Scorpionoidea Latreille 1802,where it supports the controversial sister-group relationship between Urodacus Peters1861 and Heteroscorpion Birula 1903. The mesosomal anatomy of MicrocharmusLourenço 1995 (Microcharmidae Lourenço 1996) is consistent with that of ButhidaeC.L. Koch 1837 and we therefore propose the following new synonymy:Microcharmidae Lourenço 1996 = Buthidae C.L. Koch 1837.