Polymely of Feeding Appendages in<i>Tegenaria atrica</i>(Araneae: Agelenidae)

Napiórkowska, Teresa; Jacunski, L; Templin, Julita

doi:10.13156/arac.2010.15.2.52

Cited by 11 publications

(11 citation statements)

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“…Polymelic individuals with one additional walking leg had an additional ganglion in the suboesophageal part of the nervous system. Similar results were obtained by Napiórkowska et al (2010) who investigated the polymely of chelicerae. Although an additional ganglion was identified, there was no additional venom gland associated with the additional chelicerae.…”

Section: Discussionsupporting

confidence: 89%

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Morphological and anatomical changes related to leg anomalies in Tegenaria atrica

2015

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A range of leg anomalies was detected in embryos of the Tegenaria atrica spiders exposed to alternating temperatures of 14 and 32 °C. Multiple anomalies were observed in 13 individuals. This study is based on five individuals: two individuals affected by oligomely combined, respectively, with heterosymely and polymely, one affected by polymely with heterosymely, one by complicated polymely (accompanied by the reduction in length and malformations of the distal parts of the legs), and one individual with pure polymely. Changes in the central nervous system of these five individuals were described in detail on the basis of histological sections. The changes were mainly related to the number of neuromeres. Individuals affected by polymely had additional ganglia corresponding to the number of additional appendages, whereas the absence of a leg (oligomely) was associated with the absence of a ganglion. Histological analysis showed the fusion of ganglia in the three polymelic specimens, even though additional appendages were not fused.

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Section: Discussionsupporting

confidence: 89%

“…Internal deformities are found mainly in the digestive system and the central nervous system (Jacuński 1983; Jacuński et al 2002, 2005; Napiórkowska et al 2006, 2010, 2013). The central nervous system of Poecilotheria and Argiope aurantia (Lucas) was described in detail by Babu (1965, 1969, 1975).…”

Section: Introductionmentioning

confidence: 99%

Morphological and anatomical changes related to leg anomalies in Tegenaria atrica

2015

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“…The morphology of spiders with different deformities has been analyzed in detail (JACUÑSKI et al 2002a;JACUÑSKI et al 2004;TEMPLIN et al 2009;. In addition, the anatomy of the spiders (particularly their nervous and digestive systems) was evaluated for structural anomalies (JACUÑSKI 1983;JACUÑSKI et al 2002b;NAPIÓRKOWSKA et al 2010;NAPIÓR-KOWSKA et al 2013). The incidence of oligomelic specimens in the group exposed to the teratological factor is quite high (JACUÑSKI 1984;JACUÑSKI et al 2005).…”

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Morphometric Changes of the Central Nervous System of Oligomelic <I>Tegenaria atrica</I> Spiders

Napiórkowska

Napiórkowski

Templin

2016

folia biol (krakow)

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Oligomely is an anomaly manifested in the morphology of spiders (except for deformations of the prosoma and exoskeleton), by the absence of one or more appendages, and in their anatomy by the absence of neuromeres. This study was aimed at determining whether there is a correlation between the absence of a neuromere or its half in the subesophageal ganglia and the volume of the prosoma. Morphometric studies involved oligomelic specimens of Tegenaria atrica with the absence of one walking leg and two walking legs. Volumetric analysis concerned with nymph stage II of spiders obtained after exposing the embryos to alternating temperatures of 14 and 32 0 C. The results were compared with those obtained from the histological analysis of the prosoma and central nervous system of control individuals. It was found that there was no relationship between the absence of half or an entire neuromere and the volume of the prosoma of oligomelic specimens. The volume of the central nervous system decreased but the volume change was not proportional to the changes in the prosoma volume. During studies, it was found that the lack of neuromeres resulted in an increase in the volume of remaining neuromeres.

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“…However, many of these anomalies are connected with anatomical changes, e.g., in the CNS (Harzsch et al 2000; Jacuński et al 2002a, b; Jacuński et al 2005; Napiórkowska et al 2010a; Scholtz et al 2014). Studies which provide analysis of these changes are extremely important because they facilitate the classification of the obtained deformity.…”

Section: Introductionmentioning

confidence: 99%

Morphology and the central nervous system of Eratigena atrica affected by a complex anomaly in the anterior part of the prosoma

2017

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Spider embryogenesis is affected by a range of environmental factors. Any sudden, drastic change in the environment may impair spider development, leading to various body deformities. In the present study, we analyze changes in the morphology and structure of the central nervous system of an Eratigena atrica larva, obtained in a teratological experiment in which embryos were exposed to alternating temperatures of 14 and 32°C for the first 10 days. The studied larva had three pedipalps on the right side of the prosoma (polymely), two of which were fused along their entire length (total heterosymely). In addition, there was a short, club-shaped stump between the pedipalps. Histological analysis confirmed major changes in the structure of the subesophageal ganglion, i.e., the fusion of all three ganglia of pedipalps.

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Polymely of Feeding Appendages inTegenaria atrica(Araneae: Agelenidae)

Cited by 11 publications

References 1 publication

Morphological and anatomical changes related to leg anomalies in Tegenaria atrica

Morphological and anatomical changes related to leg anomalies in Tegenaria atrica

Morphometric Changes of the Central Nervous System of Oligomelic <I>Tegenaria atrica</I> Spiders

Morphology and the central nervous system of Eratigena atrica affected by a complex anomaly in the anterior part of the prosoma

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