ASO Author Reflections: Segment 8 Resections: Perhaps Not so Hidden…

The assassin bug tribe Metapterini belongs to the subfamily Emesinae (Hemiptera: Heteroptera: Reduviidae). Morphologically, it is characterized by the conspicuous basal process of the posteroventral series in the foreleg and the presence of wing polymorphism, with a high proportion of the genera with micropterous or apterous species. Here, the male and female ectodermal genitalic structures are documented for ten genera and twenty-three species of Metapterini, including eight species of the speciose genus Ghilianella Spinola, 1850. Descriptions and digital macrophotographs are provided for abdominal segment 8, pygophore, parameres, and phallus of the male, and for tergite 8, tergite 9, gonocoxae, gonapophyses, gonoplac, and bursa copulatrix of the female. The asymmetric male genitalia within Emesinae are discussed. From this morphological documentation sixty six phylogenetic characters are coded, presented as a data matrix and analyzed cladistically, and their potential usefulness for resolving relationships among Metapterini is discussed.

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Influenza B virus RNA segment 8 codes for two nonstructural proteins

Virology ◽

10.1016/0042-6822(81)90289-0 ◽

1981 ◽

Vol 112 (2) ◽

pp. 417-425 ◽

Cited By ~ 24

Author(s):

Dalius J. Briedis ◽

Robert A. Lamb ◽

Purnell W. Choppin

Keyword(s):

Influenza B Virus ◽

Influenza B ◽

Nonstructural Proteins ◽

Virus Rna ◽

B Virus ◽

Segment 8

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Unexpectedly curved spines in a Cambrian trilobite: considerations on the spinosity in Kingaspidoides spinirecurvatus sp. nov. from the Anti-Atlas, Morocco, and related Cambrian ellipsocephaloids

PalZ ◽

10.1007/s12542-020-00514-x ◽

2020 ◽

Vol 94 (4) ◽

pp. 645-660

Author(s):

Gerd Geyer ◽

Miguel Caldeira Pais ◽

Thomas Wotte

Keyword(s):

The Body ◽

Body Posture ◽

Protective Device ◽

Experimental Phase ◽

Middle Cambrian ◽

Forest Region ◽

Spine Development ◽

Axial Ring ◽

Cambrian Trilobite ◽

Segment 8

Abstract The new ellipsocephaloid trilobite species Kingaspidoides spinirecurvatus has a spectacular morphology because of a unique set of two long and anteriorly recurved spines on the occipital ring and the axial ring of thoracic segment 8. Together with the long genal spines this whimsical dorsally directed spine arrangement is thought to act as a non-standard protective device against predators. This is illustrated by the body posture during different stages of enrolment, contrasting with the more sophisticated spinosities seen in later trilobites, which are discussed in brief. Kingaspidoides spinirecurvatus from the lower–middle Cambrian boundary interval of the eastern Anti-Atlas in Morocco has been known for about two decades, with specimens handled as precious objects on the fossil market. Similar, but far less spectacular, spine arrangements on the thoracic axial rings are known from other ellipsocephaloid trilobites from the Anti-Atlas of Morocco and the Franconian Forest region of Germany. This suggests that an experimental phase of spine development took place within the Kingaspidoides clade during the early–middle Cambrian boundary interval.

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11 Segment 8 – de distale ramus descendens anterior, deel 1

Het ecg en het angiogram bij een acuut hartinfarct ◽

10.1007/978-90-313-7822-7_12 ◽

2010 ◽

pp. 52-54

Author(s):

W.A. Dijk ◽

B.M.A. Munstra ◽

M. Munstra ◽

F. Zijlstra

Keyword(s):

Segment 8

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The Immature Stages, Biology, and Phylogenetic Relationships of Rotunda rotundapex (Lepidoptera: Bombycidae)

Journal of Insect Science ◽

10.1093/jisesa/iez025 ◽

2019 ◽

Vol 19 (2) ◽

Cited By ~ 1

Author(s):

Rung-Juen Lin ◽

Michael F Braby ◽

Yu-Feng Hsu

Keyword(s):

Phylogenetic Relationships ◽

Host Plants ◽

Morphological Data ◽

Phylogenetic Position ◽

Immature Stages ◽

Systematic Classification ◽

Separate Genus ◽

Young Leaves ◽

Segment 8 ◽

First Time

Abstract The life history, morphology, and biology of the immature stages and phylogenetic relationships of Rotunda rotundapex (Miyata & Kishida, 1990) are described and illustrated for the first time. The species is univoltine: eggs hatch in spring (March or April) and the life cycle from egg to adult is completed in about 3 wk, with larvae developing rapidly on young leaves of the host plants, Morus australis and to a lesser extent Broussonetia monoica (Moraceae), and adults emerging in April–May. Eggs are laid in clusters on twigs of the host plant, are covered by scales during female oviposition, and remain in diapause for the remainder of the year (i.e., for 10–11 mo). Larvae (all instars) are unique among the Bombycidae in that they lack a horn on abdominal segment 8. A strongly supported molecular phylogeny based on six genes (5.0 Kbp: COI, EF-1α, RpS5, CAD, GAPDH, and wgl) representing seven genera of Bombycinae from the Old World revealed that Rotunda is a distinct monotypic lineage sister to Bombyx. This phylogenetic position, together with morphological data of the immature stages (egg and larval chaetotaxy), supports the current systematic classification in which the species rotundapex has been placed in a separate genus (Rotunda) from Bombyx in which it was previously classified.

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