The oldest peracarid crustacean reveals a Late Devonian freshwater colonization by isopod relatives

نویسندگان

چکیده

Peracarida (e.g. woodlice and side-swimmers) are, together with their sister-group Eucarida krill decapods), the most speciose group of modern crustaceans, suggested to have appeared as early Ordovician. While eucarids' incursion onto land consists mainly freshwater littoral grounds, some peracarids evolved fully terrestrial ground-crawling ecologies, inhabiting even our gardens in temperate regions pillbugs sowbugs). Their fossil record extends back Carboniferous marine occurrences. Here, we provide a complete re-analysis arthropod— Oxyuropoda— reported 1908 from Late Devonian floodplains Ireland, left unresolved systematic affinities despite century attempts at identification. Known single specimen preserved two dimensions, analysed its anatomy using digital microscopy multispectral macroimaging enhance contrast morphological structures. The new anatomical characters completeness Oxyuropoda , phylogenetic analysis representatives all major Eumalacostraca groups, indicate that is crown peracarid, part clade including amphipods isopods. As such, oldest known species Peracarida, provides evidence derived had an into environments Famennian, more than 360 Ma.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Earth’s oldest ‘Bobbit worm’ – gigantism in a Devonian eunicidan polychaete

Whilst the fossil record of polychaete worms extends to the early Cambrian, much data on this group derive from microfossils known as scolecodonts. These are sclerotized jaw elements, which generally range from 0.1-2 mm in size, and which, in contrast to the soft-body anatomy, have good preservation potential and a continuous fossil record. Here we describe a new eunicidan polychaete, Websterop...

متن کامل

Alborziphyllinae, A New Late Devonian Rugose Corals Subfamily

Members of the family Laccophyllidae are small, solitary rugose corals with stratigraphic ranges from Silurian to Permian. Among the laccophyllids, axial ends of major septa are united in an aulos and dissepiments may be absent or present. Minor septa can be contratingent and sometimes are small or in some genera are absent. Septa and aulos may be thick or thin. In this study, Famennian rugose...

متن کامل

Oldest coelacanth, from the Early Devonian of Australia.

Coelacanths are well-known sarcopterygian (lobe-finned) fishes, which together with lungfishes are the closest extant relatives of land vertebrates (tetrapods). Coelacanths have both living representatives and a rich fossil record, but lack fossils older than the late Middle Devonian (385-390 Myr ago), conflicting with current phylogenies implying coelacanths diverged from other sarcopterygians...

متن کامل

Ancient androdioecy in the freshwater crustacean Eulimnadia.

Among the variety of reproductive mechanisms exhibited by living systems, one permutation--androdioecy (mixtures of males and hermaphrodites)--is distinguished by its rarity. Models of mating system evolution predict that androdioecy should be a brief stage between hermaphroditism and dioecy (separate males and females), or vice versa. Herein we report evidence of widespread and ancient androdi...

متن کامل

Late Carboniferous paleoichnology reveals the oldest full-body impression of a flying insect.

Insects were the first animals to evolve powered flight and did so perhaps 90 million years before the first flight among vertebrates. However, the earliest fossil record of flying insect lineages (Pterygota) is poor, with scant indirect evidence from the Devonian and a nearly complete dearth of material from the Early Carboniferous. By the Late Carboniferous a diversity of flying lineages is k...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Biology Letters

سال: 2021

ISSN: ['1744-9561', '1744-957X']

DOI: https://doi.org/10.1098/rsbl.2021.0226