1
|
Martynov AV, Korshunova TA. Renewed perspectives on the sedentary-pelagic last common bilaterian ancestor. CONTRIBUTIONS TO ZOOLOGY 2022. [DOI: 10.1163/18759866-bja10034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Various evaluations of the last common bilaterian ancestor (lcba) currently suggest that it resembled either a microscopic, non-segmented motile adult; or, on the contrary, a complex segmented adult motile urbilaterian. These fundamental inconsistencies remain largely unexplained. A majority of multidisciplinary data regarding sedentary adult ancestral bilaterian organization is overlooked. The sedentary-pelagic model is supported now by a number of novel developmental, paleontological and molecular phylogenetic data: (1) data in support of sedentary sponges, in the adult stage, as sister to all other Metazoa; (2) a similarity of molecular developmental pathways in both adults and larvae across sedentary sponges, cnidarians, and bilaterians; (3) a cnidarian-bilaterian relationship, including a unique sharing of a bona fide Hox-gene cluster, of which the evolutionary appearance does not connect directly to a bilaterian motile organization; (4) the presence of sedentary and tube-dwelling representatives of the main bilaterian clades in the early Cambrian; (5) an absence of definite taxonomic attribution of Ediacaran taxa reconstructed as motile to any true bilaterian phyla; (6) a similarity of tube morphology (and the clear presence of a protoconch-like apical structure of the Ediacaran sedentary Cloudinidae) among shells of the early Cambrian, and later true bilaterians, such as semi-sedentary hyoliths and motile molluscs; (7) recent data that provide growing evidence for a complex urbilaterian, despite a continuous molecular phylogenetic controversy. The present review compares the main existing models and reconciles the sedentary model of an urbilaterian and the model of a larva-like lcba with a unified sedentary(adult)-pelagic(larva) model of the lcba.
Collapse
Affiliation(s)
- Alexander V. Martynov
- Zoological Museum, Moscow State University, Bolshaya Nikitskaya Str. 6, 125009 Moscow, Russia,
| | - Tatiana A. Korshunova
- Koltzov Institute of Developmental Biology RAS, 26 Vavilova Str., 119334 Moscow, Russia
| |
Collapse
|
2
|
Kreshchenko ND. Some details on the morphological structure of planarian musculature identified by fluorescent and confocal laser-scanning microscopy. Biophysics (Nagoya-shi) 2017. [DOI: 10.1134/s0006350917020117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
|
3
|
Martynov AV. Ontogeny, systematics, and phylogenetics: Perspectives of future synthesis and a new model of the evolution of bilateria. BIOL BULL+ 2012. [DOI: 10.1134/s106235901205010x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
4
|
Canillas del Rey F, Delgado-Martos M, Muñoz-Valverde D, Quintana-Villamandos B, Martos-Rodríguez A, Delgado-Baeza E. Filogenia de la articulación de la cadera. Plasticidad del fenotipo. ¿Paradigma Lamarckiano o Darwiniano? Parte II. Rev Esp Cir Ortop Traumatol (Engl Ed) 2012; 56:245-57. [DOI: 10.1016/j.recot.2012.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 12/14/2011] [Indexed: 10/28/2022] Open
|
5
|
Hip joint phylogenesis. Phenotypic plasticity. Lamarckian or Darwinian paradigm? Part II. Rev Esp Cir Ortop Traumatol (Engl Ed) 2012. [DOI: 10.1016/j.recote.2011.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
6
|
|