Reexamination of Sexual Dimorphism and Female Reproduction in the Many-Lined Sun Skink Eutropis multifasciata from China

2013 ◽  
Vol 3 (4) ◽  
pp. 265-272
Author(s):  
DU Yu ◽  
SUN Yanyan ◽  
LIN Chixian ◽  
JI Xiang
Keyword(s):  
Sexual Dimorphism ◽  
Female Reproduction ◽  
The Many

Sexual Dimorphism and Female Reproduction in the Many-Lined Sun Skink (Mabuya multifasciata) from China

2006 ◽  
Vol 40 (3) ◽  
pp. 351-357 ◽  
Author(s):  
Xiang Ji ◽  
Long-Hui Lin ◽  
Chi-Xian Lin ◽  
Qing-Bo Qiu ◽  
Yu Du
Keyword(s):  
Sexual Dimorphism ◽  
Female Reproduction ◽  
The Many

scholarly journals Body size, female reproduction and sexual dimorphism in the lizard Ameiva ameiva (Teiidae) in a restinga of southeastern Brazil

2008 ◽  
Vol 25 (2) ◽  
pp. 370-372 ◽  
Author(s):  
Carlos Frederico Duarte Rocha
Keyword(s):  
Body Size ◽  
Sexual Dimorphism ◽  
Clutch Size ◽  
Reproductive Period ◽  
Southeastern Brazil ◽  
Head Width ◽  
Sexually Dimorphic ◽  
Female Reproduction ◽  
Female Body Size ◽  
Reproductive Body

In this study 57 specimens of the lizard Ameiva ameiva (Linnaeus, 1758) collected in the restinga at Barra de Maricá, in the state of Rio de Janeiro, southeastern Brazil, were analyzed to investigate size relations and reproduction (in females) and sexual dimorphism of this population. We answered the following questions: 1) what is the minimum reproductive body size in females? 2) what is the average clutch size and 3) how is clutch size related to body size? 4) Are body and head sizes sexually dimorphic? Mean clutch size was 6.7 ± 2.1 eggs and was positively correlated with female body size. Sexual dimorphism favoring males was found: adult mean snout-vent length was great in males (124.2 ± 17.8 mm) than females (96.5 ± 23.1 mm SVL), and males were larger with respect to head width and length, and body mass. Thus, despite the marked seasonality at Barra de Maricá, A. ameiva has an extended reproductive period. Also, intrasexual selection may have acted on females to produce larger clutches, and on males, favoring larger males.

Sexual dimorphism and female reproduction in two sympatric toad-headed lizards, Phrynocephalus frontalis and P. versicolor (Agamidae)

2011 ◽  
Vol 61 (2) ◽  
pp. 139-151 ◽  
Author(s):  
Lu-Xi Mao ◽  
Jian-Fang Gao ◽  
Xiang Ji ◽  
Yan-Fu Qu
Keyword(s):  
Sexual Dimorphism ◽  
Egg Size ◽  
Species Difference ◽  
Tail Length ◽  
Reproductive Traits ◽  
Sympatric Species ◽  
Offspring Size ◽  
Head Width ◽  
Female Reproduction ◽  
Female Reproductive Traits

AbstractWe studied sexual dimorphism and female reproduction in two sympatric species of toad-headed lizards, Phrynocephalus frontalis and P. versicolor, from Inner Mongolia, North China. The smallest reproductive females of P. frontalis and P. versicolor we recorded were 43.5 mm and 44.2 mm SVL, respectively. Females were the larger sex in P. versicolor, whereas female and male adults of P. frontalis did not differ in mean SVL. Females of P. frontalis were on average smaller than females of P. versicolor, so were males of P. frontalis. In both species females were larger in abdomen length (AL) but smaller in head length (HL), head width (HW) and tail length (TL); adults of P. frontalis were larger in HL and TL but smaller in AL and HW than adults of P. versicolor of the same size. Females of both species laid a single clutch of 2-6 eggs per breeding season. The trade-off between size and number of eggs was evident in both species. Of the examined female reproductive traits, only clutch size and egg size differed between the two species, with females of P. frontalis laying fewer but larger eggs than did females of P. versicolor of the same SVL. However, as the observed between-species difference in egg size (and thus, offspring size) was small, any niche divergence resulting from this difference could be less important in reducing competitions between these two sympatric species of lizards.

scholarly journals Morphology and Sexual Dimorphism of the Many-Lined Skink in North Central New Mexico

2015 ◽  
Vol 75 (2) ◽  
pp. 232-235
Author(s):  
Charles D. Hathcock ◽  
Marjorie A. Wright ◽  
Donald S. Sias ◽  
Gilbert J. Gonzales
Keyword(s):  
New Mexico ◽  
Sexual Dimorphism ◽  
North Central ◽  
The Many

Dry leaf or twig mantis? A new genus and species of Acanthopidae with sexually dimorphic cryptic strategies (Insecta: Mantodea)

Zootaxa ◽  
2019 ◽  
Vol 4560 (2) ◽  
pp. 331 ◽  
Author(s):  
ANTONIO A. AGUDELO R. ◽  
CAROLINE MALDANER ◽  
JOSÉ A. RAFAEL
Keyword(s):  
Sexual Dimorphism ◽  
French Guiana ◽  
New Genus ◽  
Compound Eye ◽  
Brazilian Amazon ◽  
Sexually Dimorphic ◽  
New Genus And Species ◽  
Male And Female ◽  
Rich Diversity ◽  
The Many

Praying mantises (Mantodea) are distinct for their rich diversity of cryptic adaptations. Among the many strategies, dry-leaf mimicry have evolved multiple times in unrelated lineages from different zoogeographic regions, among them the Neotropical Acanthopidae. Here we describe Metacanthops fuscum n. gen. et n. sp. based on male and female specimens from the Brazilian Amazon. The recognition of this new acanthopid lineage revealed that Acanthops amazonica Beier, 1930 (currently assigned to Metilia Stål) is a member of Metacanthops and thus we transfer this species, now referable to as Metacanthops amazonica (Beier, 1930) n. comb., redescribe the holotype, and provide new data on its distribution in Brazil and French Guiana. Metacanthops is closely related to Metilia, from which its number of forefemoral posteroventral spines, head and compound eye shape, pronotal configuration, wings features, and the entirely brown habitus of males, can distinguish it. We highlight some aspects of sexual dimorphism in Metacanthops fuscum in relation to their dimorphic cryptic strategies, where males resemble a dry leaf and females a lichenous twig. We additionally establish five recently published names under genus Metilia as nomina nuda. 

Sexual Dimorphism and Female Reproduction in a Viviparous Snake, Elaphe rufodorsata

1997 ◽  
Vol 31 (3) ◽  
pp. 420 ◽  
Author(s):  
Xiang Ji ◽  
Yue-Ying Xie ◽  
Ping-Yue Sun ◽  
Xiang-Zhong Zheng
Keyword(s):  
Sexual Dimorphism ◽  
Female Reproduction

scholarly journals Lost lovers linked at long last: elusive female Nanophyllium mystery solved after a century of being placed in a different genus (Phasmatodea, Phylliidae)

ZooKeys ◽  
2020 ◽  
Vol 969 ◽  
pp. 43-84 ◽  
Author(s):  
Royce T. Cumming ◽  
Stephane Le Tirant ◽  
Sierra N. Teemsma ◽  
Frank H. Hennemann ◽  
Luc Willemse ◽  
...  
Keyword(s):  
Sexual Dimorphism ◽  
Papua New Guinea ◽  
Small Body ◽  
Species Group ◽  
Laboratory Rearing ◽  
Males And Females ◽  
The Many ◽  
Relationship Of ◽  
The Relationship ◽  
Captive Rearing

After successful laboratory rearing of both males and females from a single clutch of eggs, the genus Nanophyllium Redtenbacher, 1906 (described only from males) and the frondosum species group within Phyllium (Pulchriphyllium) Griffini, 1898 (described only from females) are found to be the opposite sexes of the same genus. This rearing observation finally elucidates the relationship of these two small body sized leaf insect groups which, for more than a century, have never been linked before. This paper synonymizes the frondosum species group with Nanophyllium Redtenbacher, 1906 in order to create a singular and clearly defined taxonomic group. Five species are transferred from the Phyllium (Pulchriphyllium) frondosum species group and create the following new combinations: Nanophyllium asekiense (Größer, 2002), comb. nov.; Nanophyllium chitoniscoides (Größer, 1992), comb. nov.; Nanophyllium frondosum (Redtenbacher, 1906), comb. nov.; Nanophyllium keyicum (Karny, 1914), comb. nov.; Nanophyllium suzukii (Größer, 2008), comb. nov. The only taxon from this species group not transferred from the frondosum species group to Nanophyllium is Phyllium (Pulchriphyllium) groesseri Zompro, 1998. Based on protibial exterior lobes, this species belongs in the schultzei species group as described in Hennemann et al. 2009 and is therefore excluded from further discussion here. The rearing of Nanophyllium also yielded the male Nanophyllium asekiense (Größer, 2002), comb. nov. thus, enabling comparison of this male to the other previously known Nanophyllium species. Two new species of nano-leaf insects are described within, Nanophyllium miyashitaisp. nov., from Morobe Province, Papua New Guinea, and Nanophyllium daphnesp. nov., from Biak Island, Papua Province, Indonesia. With such distinct sexual dimorphism in Nanophyllium between sexes, which have only now been matched up via captive rearing, illustrated within are numerous specimens which might represent the unknown opposite sexes of the many currently known species of Nanophyllium. Due to pronounced sexual dimorphism in Nanophyllium, only future captive rearing or molecular analysis will match up the many unknown sexes. To conclude, with the description of two new Nanophyllium species, dichotomous keys to species for known males and females are presented.

Identifying suboptimalities with factorial model comparison

2018 ◽  
Vol 41 ◽  
Author(s):  
Wei Ji Ma
Keyword(s):  
Experimental Design ◽  
Model Comparison ◽  
Process Models ◽  
Multiple Forms ◽  
Factorial Experimental Design ◽  
Factorial Model ◽  
Multiple Components ◽  
The Many

AbstractGiven the many types of suboptimality in perception, I ask how one should test for multiple forms of suboptimality at the same time – or, more generally, how one should compare process models that can differ in any or all of the multiple components. In analogy to factorial experimental design, I advocate for factorial model comparison.

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