Comparative analysis of the type and number of larval sensilla on the antennae and mouthparts of Ips typographus and Ips subelongatus using SEM

Shi, Xia; Shen, J.; Zhang, Sufang; Liu, Fu; Xu, Fang-Ying; Wang, Guangli; Zhang, Zhen; Kong, Xiangbo

doi:10.1016/j.jcz.2020.08.007

Cited by 5 publications

(8 citation statements)

References 38 publications

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“…Sensilla with a fine morphology similar to sensilla twig basiconica (Stb) in this paper have been reported in the aforementioned bark and ambrosia beetles [11,12,[14][15][16]18,19,[47][48][49], Cryptorhynchus lapathi [55], rove beetles of the Staphylinine group [44], Anoplophora glabripennis [52], and Leptinotarsa decemlineata [56]. These Stb are also more prevalent on the terminal tips of the maxillary and labial palps.…”

Section: Putative Function Of Mouthpart Sensillasupporting

confidence: 58%

“…Compared with those of other scolytid beetles, including Dendroctonus spp. [46], Ips acuminatus [15], I. typographus [14,18,47], Ips subelongatus [47,48], Hypothenemus hampei [12], Platypus cylindrus [49], P. koryoensis [16], and Euplatypus parallelus [11], the mouthparts of the three Tomicus species appear to be adapted to inhabiting the inner bark environment; however, some variation in the mouthparts might reflect variation in the parts of the trunks used by Tomicus species.…”

Section: Discussionmentioning

confidence: 99%

“…Many studies have reported that sensilla basiconica (Sb) are widely distributed on the antennae, maxillary palps, and labial palps in coleopteran beetles, including larvae [47,51,52] and adults [11,[13][14][15][16]18,30,44,48,49]. Unlike porous wall Sb on the antennae, these sensilla have only some pores on the terminal tips, which are characteristic of Sb on the mouthparts.…”

Section: Putative Function Of Mouthpart Sensillamentioning

confidence: 99%

“…Sensilla with similar structures, locations, and numbers as Sb.2 are also referred to as single-walled sensilla (SW) [18,48] and sensilla styloconica subtype 2 (BA 2 ) [14,51]. The multiple pores on the tips and 5-6 dendrites without tubular bodies are typical of olfactory receptors, and the terminally located pores serve as taste receptors [18,41,47,48,54]. Given that Sb.2 are the first sensilla that come into contact with the substrates, a dual taste/olfactory function is helpful for odor sensation and discrimination.…”

Section: Putative Function Of Mouthpart Sensillamentioning

confidence: 99%

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Fine Structure of the Mouthparts of Three Tomicus Beetles Co-Infecting Pinus yunnanensis in Southwestern China with Some Functional Comments

Cui,

Zhang,

Zhu

et al. 2023

Insects

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Tomicus yunnanensis, T. brevipilosus, and T. minor are the most economically significant pests of Pinus yunnanensis in Southwestern China. Chemical and physical factors play critical roles in diverse biological activities. Here, we describe the fine structure of the adult mouthparts of these three Tomicus species using scanning and transmission electron microscopy. We identified three types of mandibular shapes, which determine their biomechanical properties, their ability to process food, and their preferred foraging locations on tree trunks. Eleven types of sensilla were discernible, including sensilla basiconica (Sb.1–2), sensilla twig basiconica (Stb.1–3), sensilla coeloconica (Sco), sensilla chaetica (Sch.1–2), sensilla trichoidea (Str.1–2), and sensilla digitiformia (Sdi). Each basiconic sensillum occurs on the palpal tips and is innervated by 2–6 dendrites. Sb.1 are gustatory receptors, Sb.2 are olfactory receptors, and the three other sensilla have dual taste and mechanical functions. Sco, Sch, and Str are mechanoreceptors. Sdi are mechanical vibration receptions, given that they are innervated by one dendrite with numerous dendritic branches into the nonporous cuticle. No significant differences among the sexes or species were identified; however, intraspecific variability in the number of Stb.3 and Sdi sensilla was evident. These results will aid future studies of Tomicus beetle behaviors.

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Section: Putative Function Of Mouthpart Sensillasupporting

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Section: Putative Function Of Mouthpart Sensillamentioning

confidence: 99%

Section: Putative Function Of Mouthpart Sensillamentioning

confidence: 99%

See 2 more Smart Citations

Fine Structure of the Mouthparts of Three Tomicus Beetles Co-Infecting Pinus yunnanensis in Southwestern China with Some Functional Comments

Cui,

Zhang,

Zhu

et al. 2023

Insects

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“…For example, the body length of I. hauseri, I. duplitatus, and I. shangrila is about 3 mm; in contrast, the body length of I. typographus and I. nitidus is about 7 mm, and I. subelongatus is slightly larger than 7 mm. In addition, the corresponding characteristics in the elevations of the frontal tubercles and the number of frontal hairs (I. typographus and I. nitidus), and the shape and spacing of the teeth (I. subelongatus, I. hauseri, I. duplitatus, and I. shangrila) also help to distinguish the sexes [65,66].…”

Section: Phylogenetic Relationships Of Ips Species In Relation To The...mentioning

confidence: 99%

Insights into the Divergence of Chinese Ips Bark Beetles during Evolutionary Adaptation

Fang

Shi

et al. 2022

Biology

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Many bark beetles of the genus Ips are economically important insect pests that cause severe damage to conifer forests worldwide. In this study, sequencing the mitochondrial genome and restriction site-associated DNA of Ips bark beetles helps us understand their phylogenetic relationships, biogeographic history, and evolution of ecological traits (e.g., pheromones and host plants). Our results show that the same topology in phylogenetic trees constructed in different ways (ML/MP/BI) and with different data (mtDNA/SNP) helps us to clarify the phylogenetic relationships between Chinese Ips bark beetle populations and Euramerican species and their higher order clades; Ips bark beetles are polyphyletic. The structure of the mitochondrial genome of Ips bark beetles is similar and conserved to some extent, especially in the sibling species Ips typographus and Ips nitidus. Genetic differences among Ips species are mainly related to their geographic distribution and different hosts. The evolutionary pattern of aggregation pheromones of Ips species reflects their adaptations to the environment and differences among hosts in their evolutionary process. The evolution of Ips species is closely related to the uplift of the Qinghai-Tibet Plateau and host switching. Our study addresses the evolutionary trend and phylogenetic relationships of Ips bark beetles in China, and also provides a new perspective on the evolution of bark beetles and their relationships with host plants and pheromones.

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Immature stages of Phloeosinus tacubayae (Curculionidae: Scolytinae): morphology and chaetotaxy of larva and pupa, sexual dimorphism of adults, and developmental time

Cervantes-Espinoza,

Alejandro Ruiz,

Cuellar-Rodríguez

et al. 2023

Journal of Insect Science

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The current knowledge of morphology and chaetotaxy of the different developmental stages within the subfamily Scolytinae presents an information deficit that needs to be addressed. Thus, the objective of the present study was to describe, the chaetotaxy and morphology of larvae and pupae, and determine the number of larval instars, the sexual dimorphism in adults, and the development time in Phloeosinus tacubayae. The number of larval instars was determined using traditional morphometry of cephalic capsule and multivariate analysis; description of morphology and chaetotaxy of larvae and pupae, and sexual dimorphism in adults was based on light microscopy and scanning electron microscopy photographs; finally, we quantified development time by mean reviews of 10 gallery systems selected randomly in infested logs, in the laboratory. Morphometric analysis of the cephalic capsule allowed the recognition of 3 different instars. Our results showed that the larvae of P. tacubayae have unique attributes in the body that differentiate them from other genera of the subfamily for example the epicranial suture is not marked, and differentiated from Phloeosinus canadensis, such as a smaller number of setae in the maxillae and without a tergal plate. The pupa had a smaller number of setae on the whole body. The most useful morphological characters to identify a sexual dimorphism in adults were found in the shape and relative position of the seventh and eighth tergites; development time lasted 40 days in total, being the pupal stage the one that took the longest to complete.

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Comparative analysis of the type and number of larval sensilla on the antennae and mouthparts of Ips typographus and Ips subelongatus using SEM

Cited by 5 publications

References 38 publications

Fine Structure of the Mouthparts of Three Tomicus Beetles Co-Infecting Pinus yunnanensis in Southwestern China with Some Functional Comments

Fine Structure of the Mouthparts of Three Tomicus Beetles Co-Infecting Pinus yunnanensis in Southwestern China with Some Functional Comments

Insights into the Divergence of Chinese Ips Bark Beetles during Evolutionary Adaptation

Immature stages of Phloeosinus tacubayae (Curculionidae: Scolytinae): morphology and chaetotaxy of larva and pupa, sexual dimorphism of adults, and developmental time

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