A transitional fossil mite (Astigmata: Levantoglyphidae fam. n.) from the early Cretaceous suggests gradual evolution of phoresy-related metamorphosis

AbstractMetamorphosis is a key innovation allowing the same species to inhabit different environments and accomplish different functions, leading to evolutionary success in many animal groups. Astigmata is a megadiverse lineage of mites that expanded into a great number of habitats via associations with invertebrate and vertebrate hosts (human associates include stored food mites, house dust mites, and scabies). The evolutionary success of Astigmata is linked to phoresy-related metamorphosis, namely the origin of the heteromorphic deutonymph, which is highly specialized for phoresy (dispersal on hosts). The origin of this instar is enigmatic since it is morphologically divergent and no intermediate forms are known. Here we describe the heteromorphic deutonymph of Levantoglyphus sidorchukae n. gen. and sp. (Levantoglyphidae fam. n.) from early Cretaceous amber of Lebanon (129 Ma), which displays a transitional morphology. It is similar to extant phoretic deutonymphs in its modifications for phoresy but has the masticatory system and other parts of the gnathosoma well-developed. These aspects point to a gradual evolution of the astigmatid heteromorphic morphology and metamorphosis. The presence of well-developed presumably host-seeking sensory elements on the gnathosoma suggests that the deutonymph was not feeding either during phoretic or pre- or postphoretic periods.

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A Transitional Fossil Mite (Astigmata: Levantoglyphidae fam. n.) from the Early Cretaceous Suggests Gradual Evolution of Phoresy-Related Metamorphosis

10.21203/rs.3.rs-409696/v1 ◽

2021 ◽

Author(s):

Pavel B. Klimov ◽

Dmitry D. Vorontsov ◽

Dany Azar ◽

Ekaterina A. Sidorchuk ◽

Henk R. Braig ◽

...

Keyword(s):

Early Cretaceous ◽

House Dust ◽

House Dust Mites ◽

Dust Mites ◽

Host Seeking ◽

Key Innovation ◽

Gradual Evolution ◽

Evolutionary Success ◽

Vertebrate Hosts ◽

Masticatory System

Abstract Metamorphosis is a key innovation allowing the same species to inhabit different environments and accomplish different functions, leading to evolutionary success in many animal groups. Astigmata is a megadiverse lineage of mites that expanded into a great number of habitats via associations with invertebrate and vertebrate hosts (human associates include stored food mites, house dust mites, and scabies). The evolutionary success of Astigmata is linked to phoresy-related metamorphosis, namely the origin of the heteromorphic deutonymph, which is highly specialized for phoresy (dispersal on hosts). However, the origin of this instar is enigmatic since it is morphologically divergent and no intermediate forms are known. Here we describe the heteromorphic deutonymph of Levantoglyphus sidorchukae n. gen. and sp. (Levantoglyphidae fam. n.) from early Cretaceous amber of Lebanon (129 Ma), which displays a transitional morphology ("missing link"). It is similar to extant phoretic deutonymphs in its modifications for phoresy but has the masticatory system and other parts of the gnathosoma well-developed. These aspects point to a gradual evolution of the astigmatid heteromorphic morphology and metamorphosis. The presence of well-developed presumably host-seeking sensory elements on the gnathosoma suggests that the deutonymph was not feeding either during phoretic or pre- or postphoretic periods.

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Seasonal differences in airway hyperresponsiveness in asthmatic patients: relationship with allergen exposure and sensitization to house dust mites

Clinical & Experimental Allergy ◽

10.1046/j.1365-2222.1997.d01-554.x ◽

1997 ◽

Vol 27 (6) ◽

pp. 627-633 ◽

Cited By ~ 26

Author(s):

S. VAN DER HEIDE ◽

J. G. R. DE MONCHY ◽

K. DE VRIES ◽

A. E. J. DUBOIS ◽

H. F. KAUFFMAN

Keyword(s):

House Dust ◽

Airway Hyperresponsiveness ◽

Allergen Exposure ◽

House Dust Mites ◽

Dust Mites ◽

Seasonal Differences ◽

Asthmatic Patients

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Correlation Between Density of House Dust Mites and Recurrence of Urticaria

Jurnal Kesehatan Andalas ◽

10.25077/jka.v8.i3.p511-514.2019 ◽

2019 ◽

Vol 8 (3) ◽

pp. 511

Author(s):

Gardenia Akhyar ◽

Rahma Ledika Veroci

Keyword(s):

Skin Prick Test ◽

House Dust ◽

House Dust Mites ◽

Dust Mites ◽

Prick Test

Beberapa kasus urtikaria pada paparan debu dan diantaranya menghubungkan sensitivitas tungau debu rumah (TDR) dengan urtikaria berdasarkan riwayat pasien dan pemeriksaan uji intradermal. Tujuan penelitian ini adalah menentukan korelasi antara kepadatan TDR dan rekurensi urtikaria. Jumlah sampel pada penelitian ini 30 orang. Kepadatan TDR dari tiap kamar sampel dihitung dengan mengumpulkan debu, dan sampel dinilai sensitivitas terhadao TDR dengan pemeriksaan skin prick test (SPT). Diagnosis urtikaria berdasarkan anamnesis, kemudian ditanyaan rekurensinya dalam tiga bulan terakhir. Hasil: Dari 30 peserta, tujuh (23,3%) sampel memiliki kepadatan TDR sedang sementara 23 (76,7%) memiliki kepadatan rendah. Selain itu, 15 sampel positif SPT terhadap alergen TDR. Dari anamnesis, 12 (40%) sampel didiagnosis urtikaria dan diantaranya, 11 orang (91,67%) positif terhadap SPT. Tidak ada sampel yang memiliki rekurensi urtikaria dalam tiga bulan terakhir. Kesimpulan: Meskipun penelitian ini tidak menunjukkan korelasi yang signifikan antara kepadatan TDR dan tingkat kekambuhan urtikaria (p> 0,05), TDR memang bisa memicu eksaserbasi. Penelitian ini membutuhkan penyelidikan lebih lanjut dengan ukuran sampel yang lebih besar.

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