Person: Esteve Serrano, Jorge Vicente
Universidad Complutense de Madrid
Faculty / Institute
Geodinámica, Estratigrafía y Paleontología
Now showing 1 - 9 of 9
PublicationUnderstanding locomotion in trilobites by means of three-dimensional models(Cell Press, 2023-09-15) Esteve Serrano, Jorge Vicente; Rubio, PedroTrilobites were one of the first animals on Earth to leave their imprints on the seafloor. Such imprints represent behavioral traces related to feeding or protection, in both cases implying different types of locomotion. Modeling how trilobites moved is essential to understand their evolutionary history and ecological impact on marine substrates. Herein, locomotion in trilobites is approached by means of three-dimensional models, which yielded two main gait types. These two gaits reflect basic behaviors: burrowing and walking. This model reveals that trilobites could change their gait and consequently increase rapidly their speed varying the amplitude of the metachronal wave, a change independent from their biological structure. Fast increases in speed enhanced the protection of trilobites against predators and sudden environmental crises. The trilobite body pattern constrained their gaits, controlled by the distance between the pair of legs and between legs in a same segment. PublicationDevelopmental and functional controls on enrolment in an ancient, extinct arthropod(The Royal Society, 2023-06-14) Esteve Serrano, Jorge Vicente; Hughes, Nigel C.Three-dimensional models reveal how the mechanics of exoskeletal enrolment changed during the development of a model organism for insights into ancient arthropod development, the 429-million-year-old trilobite Aulacopleura koninckii. Changes in the number, size and allocation of segments within the trunk, coupled with the need to maintain effective exoskeletal shielding of soft tissue during enrolment, necessitated a transition in enrolment style about the onset of mature growth. During an earlier growth phase, enrolment was sphaeroidal, with the venter of the trunk fitting exactly against that of the head. In later growth, if lateral exoskeletal encapsulation was to be maintained trunk length proportions did not permit such exact fitting, requiring an alternative, non-sphaeoridal enrolment style. Our study favours the adoption of a posture in later growth in which the posterior trunk extended beyond the front of the head. This change in enrolment accommodated a pattern of notable variation in the number of mature trunk segments, well known to characterize the development of this species. It suggests how an animal whose early segmental development was remarkably precisely controlled was able to realize the marked variation in mature segment number that was related, apparently, to life in a physically challenging, reduced oxygen setting. PublicationAssessment of morphological variation in the early Cambrian trilobite Protoryctocephalus(Taylor & Francis, 2023) Esteve Serrano, Jorge Vicente; Zhao, Yuanlong; Yang, XinglianStudies focused on morphological variation are key for chrono- and biostratigraphy. Morphological variability can be induced by biological and taphonomical biases. Their distinction can become a difficult task due to the lack of population control. Here, we analyse three populations belonging to the genus Protoryctocephalus, two populations from China (P. arcticus and P. balangensis) and a third population of P. arcticus from Greenland. Protoryctocephalus balangensis was collected from the lowermost part of the Kaili Formation where fossils are tectonically deformed while P. arcticus from the ‘Tsinghsutung’ and Greenland specimens are non-deformed. Geometric morphometrics analysis shows that these three populations indeed belong to the same species. However, the large allometry measured in P. balangensis compared with the ‘Tsinghsutung’ population and the Greenland population, which is represented by meraspid and early holaspid individuals, suggested that the morphological variation is taphonomically controlled and non-biological. The results suggest that Protoryctocephalus arcticus from the ‘Tsinghsutung’ Formation is suitable for international correlation, and further studies focus on different aspects such as ontogeny, segment development or fluctuating asymmetry and modularity. PublicationFirst confident evidence of moulting in eodiscid trilobites from the Cambrian Stage 3 of South China(Cambridge University Press, 2023-10-19) Wang, Yifan; Esteve Serrano, Jorge Vicente; Yang, Xinglian; Yu, Rongxing; Wang, DezhiTrilobite moulting behaviour has been extensively investigated. However, exuviae in eodiscid trilobites are poorly known. Here, we report two eodiscid trilobite specimens, Tsunyidiscus niutitangensis and Tsunyidiscus sp., showing Somersault configuration from the Niutitang Formation and Mingxinsi Formation of South China, respectively (Cambrian Series 2, Stage 3). The arrangements of the exoskeletons indicate that the two specimens are the slightly disturbed and undisturbed exuviae. The impression of the lower cephalic unit (LCU) displays the rostral plate in Tsunyidiscus niutitangensis. The exuviae showing the LCU inverted anteriorly under the trunk. The opening of the facial and rostral sutures would have allowed the emergence of the post-ecdysial trilobite with the partial enrolment of exoskeleton. Moreover, our discovery indicates a Somersault configuration which employed the facial and rostral sutures to create an anterior exuvial gape that also exists in eodiscid trilobites besides redlichiid trilobites, corynexochid trilobites and ptychopariid trilobites during the Cambrian. PublicationGeodivulgar: Geología y Sociedad(2023-07-07) García Frank, Alejandra; Acedo Peñato, Abel; Alonso Zarza, Ana Maria; Alonso Garcia, Rocio; Armendáriz Sanz, Andrés; Berrocal Casero, Mélani; Calonge García, Mª Amelia; Cambronero García-Miguel, Irene; Campos Millán, Eduardo; Canales Fernandez, María Luisa; Carvajal De Lago, Alba María; Cazorla Bermejo, Miguel; Cernadas Garrido, Antonio; Cervilla Muros, Miguel Ángel; Chicote Alvira, Gabriel; Chiri Pérez, Oliver; Corbalán García, Judit; Coronado Vila, Ismael; Cózar Maldonado, Pedro; Del Moral González, Begoña; Diaz Megias, Isabel; Díaz Olías, Ana; Díez García, Irene Pilar; Esteve Serrano, Jorge Vicente; Fajardo Portera, Pilar; Fesharaki, Omid; Fraguas Herráez, Ángela Raquel; Fuentes Rodriguez, María; Gamallo Paz, Isabel; Gamarra González, Jesús; García Martín, Gema; García Peco, Víctor; Gómez Recio, Marta; Gómez Heras, Miguel; González Acebrón, Laura; Gutiérrez Gálvez, María; Henriques, Maria Helena Paiva; Herrero Maire-Richard, Laura; Herrero Dominguez, Santiago; Hontecillas Tamayo, Daniel; Iglesias Álvarez, Núria; Martín Perea, David Manuel; Martín Aguilar, Lourdes; Martínez Álvarez, Leyre; Martínez Gutiérrez, Gemma; Mateos Carralafuente, José Ricardo; Mediato Arribas, José Francisco; Mejía Ruiz, Irene; Molero Monsonis, Andrea; Montesinos Del Valle, Mercedes; Moreno Muñoz, Alberto; Muñoz García, María Belen; Nacenta Torres, Pablo; Navarro Terrón, Esther; Oliva Martín, Anabel; Ozkaya De Juanas, Senay; Portales Núñez, Killian; Quesada García, Álvaro; Rodrigo Sanz, Ana; Rodríguez García, Sergio; Rodríguez García De Castro, Isabel; Romero García, Santiago Alejandro; Salas Herrera, Javier; Salazar Ramírez, Roselis Waikiria; Sánchez Fontela, Noelia; Sanz Pérez, Dánae; Suárez Pérez, María Gabriela; Torices Hernandez, Angélica; Vega Carricondo, Alejandro; Vitón García, Íñigo; Yubero Martínez, Miguel PublicationEcomorphological datasets: comment on Hopkins (2022)(Scandinavian University Press, 2023-04-11) Esteve Serrano, Jorge Vicente; Suárez Pérez, María GabrielaThe advent of new and powerful mathematical methods allows us to carry out multidimensional analyses of traits. Regarding disparity the number of methods to measure morphological variation within a taxonomical group is vast and the choice of a single disparity index can limit the interpretation of the results. The use of two disparity indexes, the sum of ranges and the sum of variances by Hopkins (2022) enriched the work by Suárez & Esteve (2021). The interpretation of the results of any sort is based on the analysed data, in this case our ecomorphological dataset. We point out the importance of an accurate ecomorphological dataset, as taxonomic mistakes or ecological misinterpretations are unavoidable and continuous updating is therefore mandatory. The updated ecomorphological dataset, using appropriate indexes and resampling, provides new and exciting results which show us a new complex scenario in the evolution of trilobites throughout the Palaeozoic. PublicationGEODIVULGAR: Geología y Sociedad(2022) García Frank, Alejandra; Acedo Peñato, Abel; Alonso Zarza, Ana María; Alonso Recio, Carlos; Alonso García, Rocío; Armendáriz Sanz, Andrés; Berrocal Casero, Melani; Calonge García, María Amelia; Cambronero García-Miguel, Irene; Campos Millán, Eduardo; Canales Fernández, María Luisa; Carvajal de Lago, Alba María; Cervilla Muros, Miguel Ángel; Chicote Alvira, Gabriel; Chiri Pérez, Oliver; Corbalán García, Judit; Coronado Vila, Ismael; Cózar Maldonado, Pedro; del Moral González, Begoña; Díaz Megías, Isabel; Díez García, Irene Pilar; Esteve Serrano, Jorge Vicente; Fajardo Portera, Pilar; Fesharaki, Omid; Fraguas Herráez, Ángela; Galán Casado, José Miguel; Gamallo Paz, Isabel; Gamarra González, Jesus; García Peco, Víctor; Gómez Heras, Miguel; González Acebrón, Laura; Paiva Henriques, María Helena; Herrero Domínguez, Santiago; Hontecillas Tamayo, Daniel; Iglesias Álvarez, Núria; López Martín, Mª del Valle; López Martín, Pablo Santiago; Martín Aguilar, Lourdes; Martín Madrid, Yolanda; Martínez Gutiérrez, Gemma; Mateos Carralafuente, José Ricardo; Mediato Arribas, José Francisco; Molero Monsonis, Andrea; Montesinos del Valle, Mercedes; Muñoz García, María Belén; Nacenta Torres, Pablo; Navarro Terrón, Esther; Oliete Puertas, Elena; Oliva Martín, Anabel; Ozkaya de Juanas, Senay Amalia; Pérez Martín del Campo, Daniel; Portales Núñez, Killian; Rodrigo Sanz, Ana; Rodríguez García, Sergio; Rodríguez García de Castro, Isabel; Salas Herrera, Javier; Salazar Ramirez, Roselis Waikiria; Sánchez Fontela, Noelia; Sanz Pérez, Dánae; Torices Hernández, Angélica; Vega Carricondo, Alejandro; Vitón García, Íñigo PublicationLife cycle evolution in the trilobites Balangia and Duyunaspis from the Cambrian Series 2 (Stage 4) of South China(PeerJ Computer Science, 2023) Chen, Zhengpeng; Zhao, Yuanlong; Yang, Xinglian; Esteve Serrano, Jorge Vicente; Liu, Xiong; Chen, ShengguangThe evolution process can be reconstructed by tracking the changes in the dynamic characters of life cycles. A number of related trilobites from the Cambrian of South China provide additional information for the study of trilobite evolutionary patterns, which has been hampered by previous incomplete fossil record though. Here, Balangia and Duyunaspis represent related Cambrian oryctocephalid trilobites from South China, are comprehensively discussed over the ontogeny, and the results show that, from B. balangensis via D. duyunensis to D. jianheensis, their exoskeletal morphology shows a directional evolution. Based on the direction of evolutionary changes in the development of Balangia and Duyunaspis, we speculate that Duyunaspis likely evolved from Balangia instead of Balangia evolved from Duyunaspis, as was previously assumed. This inference is also supported by the phylogenetic tree. This research provides not only a better understanding of the mechanisms of evolution in trilobites, but also new insights for the relationship between developmental evolutionary changes and phylogeny in trilobites. PublicationInterspecies and intraspecific variability in the trilobites Duyunaspis and Balangia from the Cambrian Series 2 (Stage 4) of Jianhe, South China(Taylor & Francis, 2022) Chen, Zhengpeng; Zhao, Yuanlong; Yang, Xinglian; Esteve Serrano, Jorge Vicente; Liu, Xiong; Chen, Shengguang; Feng, RongThough morphological variation among trilobites has been studied for some time, it is difficult to identify differences between interspecific and intraspecific variations. In this study, the intergeneric, interspecific, and intraspecific variations of the Cambrian oryctocephalid trilobites Duyunaspis and Balangia from Jianhe, South China are analysed using geometric morphometrics. In addition to the number of thoracic segments and the relative size of the pygidium compared to the cephalon mentioned in previous studies, the results in this study suggest that the predominant variation of Duyunaspis and Balangia is the presence or absence of the glabellar furrow. The interspecific variations of Duyunaspis (D. duyunensis, D. paiwuensis and D. jianheensis) mainly lie in the types of facial suture, occipital ring and glabella. Although the differences of D. duyunensis or D. jianheensis from adjacent sections have been observed, these variations may be caused by ontogeny, and do not reach the magnitude of interspecific variations in Duyunaspis. This research provides a better quantitative understanding of the variability in oryctocephalid trilobites.