female specimens of N.jurassica.This paper describes a new large female fossil spider from Dawangzhangzi,Lingyuan City,Liaoning Province of China.This new material represents a new species of Mongolarachne,which
The biological definition of species, which works for sexually reproducing organisms, is a group of actually or potentially interbreeding individuals. There are exceptions to this rule. Many species are similar enough that hybrid offspring are possible and may often occur in nature, but for the maj...
The earliest fossil record is Nephila jurassica,which was discovered from the Middle Jurassic Jiulongshan Formation in Daohugou,Ningcheng City,Inner Mongolia of China.The type specimen of N.jurassicais female was the largest fossildoi:10.1111/1755-6724.13780CHENG Xiaodong...
Speciation is the process by which new species form. It begins with the isolation of two populations. If two populations are to become sufficiently distinct that interbreeding is difficult or impossible, then there must be relatively little gene flow (migration) between them (because if there were...
(because if there were a great deal of gene flow, then genetic changes in one population would soon become widespread in the other as well). However, it is not enough for the two populations to simply be isolated; they will become separate species only if, during the period of isolation,...
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The Formation of New Species Speciation is the process by which new species form. It begins with the isolation of two populations. If two populations are to become sufficiently distinct that interbreeding is difficult or impossible, then there must be relatively little gene flow (migration) ...
The Fengjiahe Formation is its Southern equivalent, bringing a fauna similar to that of the Lufeng Formation to light. The new genus is defined based on an incomplete but unique maxilla, with a premaxillary ramus higher than long prior to the nasal process, a large and deep neurovascular ...
A new species of Xingxiulong (Dinosauria, Sauropodomorpha) from the lower Jurassic Lufeng formation of Yunnan Province, China Xiang-Yuan Chen, Ya-Ming Wang, Qian-Nan Zhang, Tao Wang & Hai-Lu You Received 03 Jul 2024, Accepted 17 Jan 2025, Published online: 03 Feb 2025 Cite this articl...
3. In the tunnel consultation suggestion to the computational procedure and the statement of condition which uses expressed clearly.[translate] a新的物种形成包括三形式:遗传、变异、选择 New speciation including three forms of relief type: Heredity, variation, choice[translate]...