ArticleDevelopment genes and evolution2016
Observations on germ band development in the cellar spider Pholcus phalangioides.
Article in Development genes and evolution, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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11 citing papers in PubMed, 18 citations in OpenAlex.
- Review
- Article
- Expression of posterior Hox genes and opisthosomal appendage development in a mygalomorph spider.Development genes and evolution · 2023Article
- Laboratory breeding and rearing of cellar spider, Crossopriza lyoni Blackwall.Development genes and evolution · 2022Article
- Article
- Lack of evidence for conserved parasegmental grooves in arthropods.Development genes and evolution · 2022Article
- A chelicerate Wnt gene expression atlas: novel insights into the complexity of arthropod Wnt-patterning.EvoDevo · 2021Article
- Embryonic development and secondary axis induction in the Brazilian white knee tarantula Acanthoscurria geniculata, C. L. Koch, 1841 (Araneae; Mygalomorphae; Theraphosidae).Development genes and evolution · 2020Article
- Experimental duplication of bilaterian body axes in spider embryos: Holm's organizer and self-regulation of embryonic fields.Development genes and evolution · 2020Review
- Expression and function of the zinc finger transcription factor Sp6-9 in the spider Parasteatoda tepidariorum.Development genes and evolution · 2017Article
- Rapid diversification of homothorax expression patterns after gene duplication in spiders.BMC evolutionary biology · 2017Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Most recent studies of spider embryonic development have focused on representatives of the species-rich group of entelegyne spiders (over 80 % of all extant species). Embryogenesis in the smaller spider groups, however, is less well studied. Here, we describe the development of the germ band in the spider species Pholcus phalangioides, a representative of the haplogyne spiders that are phylogenetically the sister group of the entelegyne spiders. We show that the transition from radially symmetric embryonic anlage to the bilaterally symmetric germ band involves the accumulation of cells in the centre of the embryonic anlage (primary thickening). These cells then disperse all across the embryonic anlage. A secondary thickening of cells then appears in the centre of the embryonic anlage, and this thickening expands and forms the segment addition zone. We also confirm that the major part of the opisthosoma initially develops as a tube shaped structure, and its segments are then sequentially folded down on the yolk during inversion. This special mode of opisthosoma formation has not been reported for entelegyne spiders, but a more comprehensive sampling of this diverse group is necessary to decide whether this peculiarity is indeed lacking in the entelegyne spiders.
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