Exceptional preservation of comma shrimp from a mid-Cretaceous Lagerstatte of Colombia, and the origins of crown Cumacea

被引:10
作者
Luque, Javier [1 ,2 ,3 ]
Gerken, Sarah [4 ]
机构
[1] Yale Univ, Dept Geol & Geophys, New Haven, CT 06520 USA
[2] Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, Canada
[3] Smithsonian Trop Res Inst, Balboa 084303092, Panama
[4] Univ Alaska Anchorage, Dept Biol Sci, Anchorage, AK 99508 USA
基金
加拿大自然科学与工程研究理事会;
关键词
Arthropoda; Crustacea; fossil record; Mesozoic; Neotropics; Peracarida; CRUSTACEA;
D O I
10.1098/rspb.2019.1863
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Mesozoic rocks with exceptional preservation of marine arthropods are known worldwide but largely restricted to mid-high latitudes. The scarcity of assemblages with exceptional preservation in low, tropical latitudes greatly limits our understanding of the origins of several modern groups and the evolution of tropical biotas through time. Here, we report the oldest crown Cumacea, or 'comma' shrimp (Arthropoda: Eumalacostraca: Peracarida) with modern familial affinities, from a new mid-Cretaceous (95-90 Ma) Lagerstatte in tropical South America. Cumaceans have one of the poorest fossil records among marine arthropods, despite today being abundant and speciose benthic organisms associated with fine-grained sediments with high fossilization potential. Eobodotria muisca gen. et sp. nov., found in mass accumulation surfaces, preserves with detail the gut, mouth parts, thoracic legs/pereopods, pleopods, uropods bearing setae, antennal flagella and even small eyes bearing ommatidia. These features, rarely preserved in fossil crustaceans, plus the large sample size (greater than 200 individuals, 6-8 mm long), allow us to discuss phylogenetic/systematic aspects and explore possible mechanisms behind their unusual accumulation. Eobodotria bridges an approximately 165 Myr gap in the cumacean fossil record, provides a reliable calibration point for phylogenetic studies and expands our understanding of exceptional preservation in past and present tropical settings.
引用
收藏
页数:8
相关论文
共 24 条
[1]  
Ayres DL, 2012, SYST BIOL, V61, P170, DOI [10.1093/sysbio/syr100, 10.1093/sysbio/sys029]
[2]  
BACHMAYER FRIEDRICH, 1960, ECLOGAE GEOL HELVETIAE, V53, P422
[3]   TAPHONOMY OF THE NORTH-AMERICAN DECAPODS [J].
BISHOP, GA .
JOURNAL OF CRUSTACEAN BIOLOGY, 1986, 6 (03) :326-355
[4]  
Calman W.T., 1904, The Annals and Magazine of Natural History, Series 7, V13, P144, DOI [DOI 10.1080/00222930408562451, 10.1080/00222930408562451]
[5]   Platycuma bamberconfabulor sp nov (Crustacea: Cumacea: Nannastacidae) from Antarctica, with a note on the gut of Platycuma [J].
Gerken, Sarah ;
Watling, Les .
ZOOTAXA, 2015, 3995 (01) :133-137
[6]  
Goloboff P, 2008, CLADISTICS, V24, P91
[7]  
Hale H. M., 1953, Transactions of the Royal Society of South Australia, V76, P70
[8]   Molecular insights, into Cumacean family relationships (Crustacea, Cumacea) [J].
Haye, PA ;
Kornfield, I ;
Watling, L .
MOLECULAR PHYLOGENETICS AND EVOLUTION, 2004, 30 (03) :798-809
[9]   Systematics of the genera of Bodotriidae (Crustacea: Cumacea) [J].
Haye, Pilar A. .
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, 2007, 151 (01) :1-58
[10]  
Kroyer H, 1846, NATURHISTORISK TIDSS, V2, P123