The Spider Genera Neottiura and Anelosimus in America (Araneae: Theridiidae)

Levi, Herbert W.

doi:10.2307/3223613

Cited by 45 publications

(64 citation statements)

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“…54), or Eb (terminology from Levi 1956). The Eb often closely follows and may support, the E. The embolic division b is variable in size, degree of sclerotization, orientation, and rugosity.…”

mentioning

confidence: 99%

Morphology and Evolution of Cobweb Spider Malegenitalia (Araneae, Theridiidae)

Agnarsson

Coddington

Knoflach

2007

Journal of Arachnology

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ABSTRACT. This study elucidates the homology of elements of the male palps in the spider family Theridiidae. We survey and illustrate 60 species from 29 out of the 86 currently recognized genera representing all subfamilies. The study is buttressed by a phylogenetic framework, and uses a new method to evaluate critically competing homology hypotheses based on various criteria. Among the classic criteria for homology, topology performed better than special similarity, and much better than function. Guided by those results, we propose names for and correspondences among the broad diversity of theridiid palpal tegular sclerites. We discuss the phylogenetic utility and distribution of key palpal characteristics, and evaluate existing evolutionary hypotheses of the theridiid palp and its components.

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confidence: 99%

Morphology and Evolution of Cobweb Spider Malegenitalia (Araneae, Theridiidae)

Agnarsson

Coddington

Knoflach

2007

Journal of Arachnology

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“…S Ashland (43), 10/02/1999, LMH 12178. Parasteatoda tepidariorum (C.L. Koch, 1841) (Common House Spider) -This species is widespread in the US, but no localities were given for Louisiana by Levi (1955aLevi ( , 1967. This is the fi rst published record for this species in Louisiana.…”

Section: Theridiidaementioning

confidence: 99%

Additions to the Spider Fauna of Northwestern Louisiana

Hardy

2010

Southeastern Naturalist

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“…According to AUSTAD's hypothesis (1984) first male sperm priority should be expected in this species, because A. cf. studiosus presents two separated ducts (one for insemination and another for fertilisation) coinciding with a "conduit" spermatheca (LEVI 1956).…”

Section: Proportional Adjustmentsmentioning

confidence: 99%

An indirect approach to study sperm precedence in a subsocial spider

Lorieto¹,

Ghione²,

Viera

2010

Ethology Ecology & Evolution

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Sperm precedence in a subsocial spider V. Lorieto et al.The subsocial spider Anelosimus cf. studiosus has a sex ratio biased toward females, but unexpectedly males perform ritualised fights to gain first access to females. Usually females will mate first with the winner male, but they can remate with loser males, remaining as satellite. We tried to discover why loser males wait to mate with a copulated female, instead of looking for virgin females. We considered the first male as a winner and the second as a loser, without allowing them to engage in fights. The objective of the present study was to determine sperm priority, by performing double copulations, with normals and males sterilised with gamma radiation (2000 rad). They were randomly assigned to one of the three experimental groups (IN, NI or NN). In the group IN, 13 females mated with irradiated males and 24-48 hr later with normal males. In the group NI, 12 females mated with normal males and 24-48 later with irradiated males, and in the control group NN, 12 females mated with 2 normal males. We opened the egg sac and counted the number of embryos and eggs. In the IN and NN groups we obtained 80% successful egg sacs and 75% in NI. We did not find differences in the total number of eggs laid per egg sac (eggs + embryos) or between the total number of embryos, among the three groups. The results suggest that first and second males would have similar percentages of paternity. Future studies will focus on morphology and mechanisms of female choice in this species.

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The Spider Genera Neottiura and Anelosimus in America (Araneae: Theridiidae)

Cited by 45 publications

References 1 publication

Morphology and Evolution of Cobweb Spider Malegenitalia (Araneae, Theridiidae)

Morphology and Evolution of Cobweb Spider Malegenitalia (Araneae, Theridiidae)

Additions to the Spider Fauna of Northwestern Louisiana

An indirect approach to study sperm precedence in a subsocial spider

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