Heavier-shorter-wider females in the millipede Centrobolus inscriptus Attems (Spirobolida: Trigoniulidae)

Cooper, Mark Ian

doi:10.22271/j.ento.2016.v4.i2g.08

Cited by 9 publications

(10 citation statements)

References 3 publications

(6 reference statements)

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“…Millipedes illustrate reversed sexual size dimorphism (SSD) and females are larger than males [4][5][6][7][8][9] . SSD in forest millipedes has successfully been understood as volumetric measurements using Centrobolus to corrobrate Rensch's rule [4][5][6][7] . Based on the assumption of equal developmental rates in males and females, the proximate cause for Rensch's rule is sexual bimaturism [10][11] .…”

Section: Introductionmentioning

confidence: 99%

Relative sexual size dimorphism in Centrobolus fulgidus (Lawrence) compared to 18 congenerics

Cooper¹

2017

J. Entomol. Zool. Stud.

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The present research was aimed to study relative sexual size dimorphism of Centrobolus fulgidus (Lawrence) compared to 18 congenerics. Millipedes illustrate reversed sexual size dimorphism (SSD) as females are larger than males; and corroborate Rensch's rule as this dimorphism increases with body size. SSD was calculated in 18 species of the genus Centrobolus and illustrated as a regression. The approximate relative position of C. fulgidus was shown from measurements taken at Richards Bay Minerals (February 1996) and St. Lucia Estuary (December 1996) in South Africa. The size of C. fulgidus was 56.2 X 5.4 mm: 63.5 X 5.2 mm (males: females; n=11) and logged (x = 3.398; y = 3.301). The mean volume ratio for C. fulgidus was 1.2505. The evidence suggests the proximate cause for SSD in C. ruber is sexual bimaturism while the ultimate cause in Centrobolus is intersexual competition.

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Section: Introductionmentioning

confidence: 99%

Relative sexual size dimorphism in Centrobolus fulgidus (Lawrence) compared to 18 congenerics

Cooper¹

2017

J. Entomol. Zool. Stud.

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“…Behavioural patterns such as provisioning versus non-provisioning relate to SSD [3] . Millipedes illustrate reversed sexual size dimorphism (SSD) and females are larger than males [4][5][6][7][8][9] . SSD in forest millipedes has successfully been understood as volumetric measurements using Centrobolus to corrobrate Rensch's rule [4][5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

Relative sexual size dimorphism in Centrobolus digrammus (Pocock) compared to 18 congenerics

Cooper¹

2017

J. Entomol. Zool. Stud.

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The present research was aimed to study relative sexual size dimorphism of Centrobolus digrammus (Pocock) compared to 18 congenerics. Millipedes illustrate reversed sexual size dimorphism (SSD) as females are larger than males; and corroborate Rensch's rule as this dimorphism increases with body size. SSD was calculated in 18 species of the genus Centrobolus and illustrated as a regression. The approximate relative position of C. digrammus was shown from measurements taken at Simon's Town Waterfall, South Africa (March 1997). The size of C. digrammus was 49.9 X 4 mm: 54.5 X 4.8 mm (males: females; n=6) and logged (females/x = 2.993; males/y = 2.790). The mean volume ratio for C. digrammus was 1.599. The evidence suggests the proximate cause for SSD in C. ruber is sexual bimaturism while the ultimate cause in Centrobolus is intersexual competition.

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“…Millipedes illustrate reversed sexual size dimorphism (SSD) and females are larger than males [1][2][3][4] . Diplopoda are underrepresented in allometric analyses of sexual size dimorphism (SSD), although sexual size differences are known in body mass, length, width and leg dimensions of over half the taxa studied [1][2][5][6][7][8][9][10] . Size differences correlate with factors such as color, sexes, species, urbanisation and water relations [4,[10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Centrobolus dubius (Schubart, 1966) Monomorphism

Cooper¹

2019

International Journal of Research Studies in Zoology

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Present research aimed to study relative sexual size dimorphism of Centrobolus dubius compared to congenerics. Millipedes illustrated reversed sexual size dimorphism (SSD) as females were larger than males and broke the rule as this dimorphism increased with body size. SSD was calculated in 18 species of the genus Centrobolus and illustrated as a regression. The approximate relative position of C. dubius was shown from measurements taken in South Africa. The average size of C. dubius was 45 X 4.825 mm (n=8) and logged (x/y = 3.0319063). Males were 45 X 4.825 mm (n=4) and females 50.75 X 57.32348 mm (n=4). The SSD index was 1,040266. Log volume measurements were (females/x = 2.43688 mm 3 ; males/y = 2.392273 mm 3). The difference between the correlation coefficients for the species and the genus were not highly significant

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Heavier-shorter-wider females in the millipede Centrobolus inscriptus Attems (Spirobolida: Trigoniulidae)

Cited by 9 publications

References 3 publications

Relative sexual size dimorphism in Centrobolus fulgidus (Lawrence) compared to 18 congenerics

Relative sexual size dimorphism in Centrobolus fulgidus (Lawrence) compared to 18 congenerics

Relative sexual size dimorphism in Centrobolus digrammus (Pocock) compared to 18 congenerics

Centrobolus dubius (Schubart, 1966) Monomorphism

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