First report of predation on floral visitors by crab spiders on Croton selowii Baill. (Euphorbiaceae)

Novo, Reinaldo Rodrigo; Souza, Jefferson Thiago; Castro, Cibele Cardoso

doi:10.1590/s0102-33062010000200029

Cited by 5 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, very little attention has been paid to pollination studies in Croton. Three pollination syndromes were reported in Croton, e.g., wind pollination (Domínguez et al, 1989), insect pollination (Freitas et al, 2001;Pires et al, 2004;Narbona and Dirzo, 2010), or mixed pollination (Novo et al, 2010). However, those studies were conducted in few species of Croton.…”

Section: Petal Evolution In Crotonmentioning

confidence: 99%

Divergent Developmental Pathways Among Staminate and Pistillate Flowers of Some Unusual Croton (Euphorbiaceae)

et al. 2020

View full text Add to dashboard Cite

Croton is a mega-diverse genus of more than 1,200 species with great morphological diversity and highly dimorphic flowers. Staminate flowers generally possess petals and a variable number of stamens and lack of an ovary. Pistillate flowers generally lack petals or have filamentous structures instead; stamens are lacking, and the ovary is generally tricarpellate with divided styles. However, well-developed petals can be found in pistillate flowers of some African species and two New World sections, i.e., sect. Alabamenses and sect. Eluteria subsect. Eluteria. Our objectives are to compare ontogeny in dimorphic flowers of Croton which may elucidate the origin of petals, homology of the filamentous structures, nectaries, and diversity of the androecium. The development of staminate and pistillate flowers of C. alabamensis (sect. Alabamenses) and C. schiedeanus (sect. Eluteria) was studied under the scanning electron microscope (SEM) and compared with C. chilensis (sect. Adenophylli) which has filamentous structures in pistillate flowers. In staminate flowers, petals develop in alternation with sepals and later the outermost stamen whorl develops opposite to the petals. In a much later stage, nectar glands emerge in alternation with the petals. In pistillate flowers, filamentous structures and petals share the same early development in alternation with the sepals. However, growth of the filamentous structures of C. chilensis becomes arrested, while petals of C. alabamensis and C. schiedeanus develop similar to those of the staminate flowers. The main conclusions of the study are: (1) Petals and filamentous structures are homologous based on their location and shape in early development. (2) Nectaries with variable morphology develop in antesepalous position and probably represent receptacular outgrowths and are not staminodial. (3) Staminate flower development displays an unexpected diversity, including a floral cup in C. alabamensis. All investigated species have an unusual centrifugal initiation of the second stamen whorl. (4) The possible evolutionary loss and potential regain of petals among different species of Croton is discussed in relation to heterochrony. We suggest that the filamentous structures in pistillate flowers represent pedomorphic forms of petals of staminate flowers, and that the well-developed petals in C. alabamensis and C. schiedeanus are derived via a developmental reversion.

show abstract

Section: Petal Evolution In Crotonmentioning

confidence: 99%

Divergent Developmental Pathways Among Staminate and Pistillate Flowers of Some Unusual Croton (Euphorbiaceae)

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The prey-predator trophic relationship between spiders and bees is well documented in the scientific literature, especially for spiders that employ the sit-and-wait strategy (e.g., family Thomisidae), capturing bees while they forage on flowers (Dukas and Morse 2003;Novo et al 2009;Rocha-Filho and Rinaldi 2011), or are captured through webs (Craig 1994;Rao 2010; Ximenes and Gawryszewski 2019). However, Salticidae are predatory insects that actively seek their food and do not build webs (Edwards 2000).…”

mentioning

confidence: 99%

Exotic and predatory: a spider (Araneae: Salticidae) that preys on native stingless bees (Hymenoptera: Meliponini) in Brazil

Trindade-Santos,

Lima Ramos,

Silva Melo

et al. 2023

RCHE

View full text Add to dashboard Cite

Pollination is a fundamental ecosystem service for the natural balance. Bees are the main biological agents for carrying out this service. It is known that the excessive simplification process of the landscape through anthropic action hinders the establishment of more sensitive species and favors generalist, exotic and invasive species. Thus, urbanization is a process that threatens native species. Thus, it is essential to understand the impact of this relationship, since it can foster tools that make cities more pleasant environments for pollinators. The aim of this study was to record the predation of a eusocial stingless bee species by an invasive exotic spider. Understanding this relationship is important from an environmental and economic point of view, since the preyed species is a potential pollinator of agricultural crops, and its rational breeding is widespread in Brazil.

show abstract

Ecological role of a flower-dwelling predator in a tri-trophic interaction in northwestern Patagonia

2019

View full text Add to dashboard Cite

First report of predation on floral visitors by crab spiders on Croton selowii Baill. (Euphorbiaceae)

Cited by 5 publications

References 11 publications

Divergent Developmental Pathways Among Staminate and Pistillate Flowers of Some Unusual Croton (Euphorbiaceae)

Divergent Developmental Pathways Among Staminate and Pistillate Flowers of Some Unusual Croton (Euphorbiaceae)

Exotic and predatory: a spider (Araneae: Salticidae) that preys on native stingless bees (Hymenoptera: Meliponini) in Brazil

Ecological role of a flower-dwelling predator in a tri-trophic interaction in northwestern Patagonia

Contact Info

Product

Resources

About