Characterization of the internal reproductive organs and their state as diapause indicator in Phytalus sanctipauli Blanchard, 1850 (Coleoptera, Scarabaeidae)

Diefenbach, Lucia Maria Lopes de Almeida Guedes; Gassen, D. N.

doi:10.1590/s0034-71081998000300019

Cited by 9 publications

(14 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Each accessory gland was approximately 4.5 cm in length. Unlike in P. sanctipauli (Diefenbach et al , 1998), the male accessory glands showed no obvious elongation with sexual maturation in D. ishigakiensis. Preliminary observations showed that the flight muscles changed both in colour and mass during the course of adulthood.…”

Section: Methodscontrasting

confidence: 56%

“…Fujiyama (1983) demonstrates the important role of temperature in the control of diapause in overwintering larvae of Anomala cupre , Anomala rufocupre and Maladera castanea . Diefenbach et al (1998) suggest the occurrence of adult diapause in Phytalus sanctipauli in Coxilha (southern Brazil) and summarize other examples; Sweetman (1931) records diapause for Phyllophaga anxia, Phyllophaga impliccita, Phyllophaga fusca and Phyllophaga drake in Minnesota (U.S.A.), Richter (1940) records it for Phyllophaga hirticula, Phyllophaga rugosa, P. implicita, P. fusca and Phyllophaga cremulata in Kentucky (U.S.A.), Guppy & Harcourt (1970) record it for P. fusca in Quebec (Canada), and Berberet & Helms (1972) record it for Phyllophaga anxia in Nebraska (U.S.A.). Most of these beetles with adult diapause are either temperate or cool‐temperate species, and the presence of diapause is claimed to be based on field survey or dissection of field‐collected individuals without experimental approaches.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Presence of larval and adult diapauses in a subtropical scarab beetle: graded thermal response for synchronized sexual maturation and reproduction

Tanaka

Yukuhiro

Yasui

et al. 2008

Physiological Entomology

View full text Add to dashboard Cite

The white grub Dasylepida ishigakiensis has a 2‐year life cycle and spends approximately 9 months as a nonfeeding larva, pupa and adult on a subtropical island. Evidence is presented indicating that this beetle has two diapauses that appear to synchronize this long life cycle with the seasons. Larvae exposed to 20, 22.5, 25 and 27.5 °C late in the third (last) stadium pupate rapidly except for some individuals kept at the highest temperature. The latter pupate upon transfer to 22.5 °C, indicating that larval diapause is maintained at high temperature but terminates upon transfer to a lower temperature. Pupal development is directly temperature‐dependent in the range 20–30 °C. Adults develop reproductive organs (i.e. the ovary in females and the seminal vesicles and accessory glands in males) rapidly at 15 and 20 °C, whereas those kept at 25 °C take a long time to do so. Ovarian development is completely suppressed at 30 °C but initiated upon transfer to 20 °C. In the laboratory, males with well‐developed reproductive organs mate even with sexually immature females, whereas females with undeveloped ovaries show no sexual behaviour. Although the two diapauses of this species are thermally regulated (i.e. a characteristic commonly expressed by insects in summer diapause), adults of this beetle emerge from pupae late in the autumn and remain in the soil for 2 months. Adult diapause effectively serves to synchronize the time of sexual maturation with the coldest month of the year.

show abstract

Section: Methodscontrasting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Presence of larval and adult diapauses in a subtropical scarab beetle: graded thermal response for synchronized sexual maturation and reproduction

Tanaka

Yukuhiro

Yasui

et al. 2008

Physiological Entomology

View full text Add to dashboard Cite

show abstract

“…Here, they become attached to central rods (spermatostyles), forming secondary conjugates (spermiozeugmata). A similar testicular arrangement has been found in other species e.g., in male scarabaeid beetles Phytalus sanctipauli [87].…”

Section: Titanus Testessupporting

confidence: 84%

First Comprehensive Study of a Giant among the Insects, Titanus giganteus: Basic Facts from Its Biochemistry, Physiology, and Anatomy

Dvořáček

Sehadová

Weyda

et al. 2020

Insects

View full text Add to dashboard Cite

Titanus giganteus is one of the largest insects in the world, but unfortunately, there is a lack of basic information about its biology. Previous papers have mostly described Titanus morphology or taxonomy, but studies concerning its anatomy and physiology are largely absent. Thus, we employed microscopic, physiological, and analytical methods to partially fill this gap. Our study focused on a detailed analysis of the antennal sensilla, where coeloconic sensilla, grouped into irregularly oval fields, and sensilla trichoidea were found. Further, the inspection of the internal organs showed apparent degeneration of the gut and almost total absence of fat body. The gut was already empty; however, certain activity of digestive enzymes was recorded. The brain was relatively small, and the ventral nerve cord consisted of three ganglia in the thorax and four ganglia in the abdomen. Each testis was composed of approximately 30 testicular follicles filled with a clearly visible sperm. Chromatographic analysis of lipids in the flight muscles showed the prevalence of storage lipids that contained 13 fatty acids, and oleic acid represented 60% of them. Some of our findings indicate that adult Titanus rely on previously accumulated reserves rather than feeding from the time of eclosion.

show abstract

“…This study, which also comprehends and characterizes the diapause, is important in interpreting of population field data and, consequently, could furnish subsidies for the integrated pest management of O. poecilus (TyndaleBiscoe, 1984;Aner & Becker, 1991;Redaelli et al, 1995;Diefenbach et al, 1998). (1, 2, and 3 respectively indicate 1/3, 2/3, and 3/3 of the abdominal cavity filled with body fat.…”

Section: Diapause Characterizationmentioning

confidence: 93%

Characterization of the imaginal reproductive diapause of Oebalus poecilus (Dallas) (Hemiptera: Pentatomidae)

et al. 2003

View full text Add to dashboard Cite

The state of development of the internal reproductive organs of male and female Oebalus poecilus (Dallas) as well as the body fat amount in the abdominal cavity during hibernation, of individuals sampled in bamboo litter in Eldorado do Sul (30º02'S and 51°23'W), RS, Brazil was investigated. Females and males showed the abdominal cavity filled with body fat in the beginning of the hibernation phase. The decrease in fat reserve level occurred from August on for males and from October on for females. Ovaries and testis doubled in length and tripled in width from immature to the reproductive phase. Male sexual maturation occurred in the hibernation sites while for females it occurred later on outside of the sites. Reproductive organ immaturity and abdominal body fat hypertrophy characterized the diapause of O. poecilus.Key words: overwintering, small rice stink bug, reproductive organs. Palavras-chave: hibernação, percevejo-do-grão, órgãos reprodutivos. RESUMO

show abstract

Characterization of the internal reproductive organs and their state as diapause indicator in Phytalus sanctipauli Blanchard, 1850 (Coleoptera, Scarabaeidae)

Cited by 9 publications

References 8 publications

Presence of larval and adult diapauses in a subtropical scarab beetle: graded thermal response for synchronized sexual maturation and reproduction

Presence of larval and adult diapauses in a subtropical scarab beetle: graded thermal response for synchronized sexual maturation and reproduction

First Comprehensive Study of a Giant among the Insects, Titanus giganteus: Basic Facts from Its Biochemistry, Physiology, and Anatomy

Characterization of the imaginal reproductive diapause of Oebalus poecilus (Dallas) (Hemiptera: Pentatomidae)

Contact Info

Product

Resources

About