341 KB25 KB200220262020Klenovšek, Tinaštevilka:1letnik:63str. 17-23ISSN:1408-3671COBISSID_HOST:27972611URN:URN:NBN:SI:doc-84805BVGenDruštvo biologov SlovenijeActa biologica slovenicacraniumEuropean ground squirrelkranijlobanjamodular organizationmodularna organizacijaRV coefficientRV koeficientSciuridaeskullSpermophilus citellustekuniceModularity of the dorsal and lateral view of the skull in the European ground squirrel| Modularnost dorzalne in lateralne strani lobanje evropske tekunice|Modular organization is a general characteristic of biological systems from cellular to organismal level. The mammalian skull is a complex structure that can in general be divided into two functional components, the neurocranium and the viscerocranium. The two-module organisation of the skull of the European ground squirrel Spermophilus citellus (Linnaeus, 1766) has already been confirmed on the ventral cranium, while different studies of integration and modularity of squirrel skulls in general gave mixed results. Studies using 2D geometric morphometrics capture and analyse different views of the skull separately, and often the ventral cranial view is considered as the most suitable. In this study, the hypothesis of the two-module organisation of the S. citellus skull was re-evaluated and confirmed also on the dorsal and lateral cranial view. Nevertheless, the lateral cranium was more integrated than the dorsal cranium. Allometry had almost no effect on the pattern of modularity. This and the previous study of the S. citellus skull modularity show that different cranial views can give different results. Advisably, all three views should be considered also because the lateral view of the skull shows morphological variation in the sagittal plane that is not visible along the frontal plane, when only the ventral and/or dorsal views are consideredModularna organizacija je splošna značilnost biotskih sistemov od nivoja celic do organizmov. Lobanja sesalcev je kompleksna struktura, ki jo lahko razdelimo v dve funkcionalni komponenti, nevrokranij in viscerokranij. Organizacija lobanje evropske tekunice Spermophilus citellus (Linnaeus, 1766) na dva modula je bila potrjena na ventralni strani lobanje, medtem ko različne raziskave integracije in modularnosti lobanje veveric na splošno dajejo različne rezultate. Raziskave, ki temeljijo na dvo-dimenzionalni geometrijski morfometriji, ločeno zajemajo in analizirajo različne strani lobanje in pogosto obravnavajo ventralno stran lobanje kot najbolj primerno. V tej raziskavi je bila modularna organizacija lobanje S. citellus ponovno ovrednotena in potrjena tudi na dorzalni in lateralni strani lobanje. Vendar je bila stopnja integracije lateralne strani bolj izrazita kot dorzalne. Alometrija ni imela skoraj nobenega vpliva na vzorec modularnosti. Ta in predhodna raziskava modularnosti lobanje S. citellus kažeta, da lahko različne strani lobanje dajo različne rezultate. Iz tega sledi, da je priporočljiva obravnava vseh treh strani lobanje, tudi zato, ker je z lateralne strani lobanje vidna morfološka variabilnost v sagitalni ravnini, medtem ko lahko pri analizi samo ventralne in/ali dorzalne strani zajamemo variabilnost samo v frontalni ravniniTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaDruštvo biologov Slovenije