Luksevics in the Department of Geology, Faculty of Geography and Earth Sciences, University of Latvia), 1.42.738.2017 and 3.42.1103.2016 (collecting the agnathan
and fish remains from the Gauja and Amata deposits of the Baltic Region and comparison of vertebrate assemblages).
The first assemblage of vertebrates to be described from the Eastport Formation of Maine, USA, includes agnathan
remains comprising scale fragments of osteostracans and anaspids, and scales of thelodonts.
The nektic, nektobenthic and planktonic communities (fishes, agnathans
, conodonts, graptolites, chitinozoans) of the East Baltic Silurian.
Because the evidence of these fish, called agnathans
, is scant and fragmentary, scientists know little about the agnathans
' appearance or about their evolutionary history.
Many types of SS have been cloned with the same amino acid (aa) sequence in vertebrates subsequently, from agnathans
to mammals (Conlon et al., 1997).
, chondrichthyans, and functionality of fish aquaporins generally have received little attention.
In Reproductive biology and phylogeny of fishes (agnathans
and bony fishes): phylogeny, reproductive system, viviparity, spermatozoa.
Reproductive biology and phylogeny of fishes (agnathans
and bony fishes); phylogeny, reproductive system, viviparity, spermatozoa.
Kompleksy srednedevonskikh psammosteidnykh beschelyustnykh vostochnoj chasti Glavnogo devonskogo polya [The assemblages of Middle Devonian psammosteid agnathans
from the eastern part of the Main Devonian Field].
Electrolocation has been documented among agnathans
(Bodznick and Northcutt, 1981), amphibians (Himstedt et al., 1982), chondrosteans (Wilkens et al., 1997), mammals (Scheich et al., 1986; Czech-Damal et al., 2012), sarcopterygians (Northcutt, 1980), and teleosts (Alves-Gomes, 2001).
Exoskeleton ultrasculpture of early agnathans
In 1975 a palaeontological expedition from Gottingen and Cologne universities (Germany) visited Arctic Canada (Langenstrassen & Schultze 1996) and inter alia collected agnathans
and gnathostomes in Lower Devonian localities on the northern part of Prince of Wales Island (Fig.