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A sclerite making up part of the sternum of an arthropod.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


the sternum or ventral part of each segment of an insect body
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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loimicola in: carapace branchial margins distinctly convergent posteriorly; median lobe of third thoracic sternite absent; and dorso-anterior margin of carpus of larger cheliped more gently and constantly convex on entire length.
Abdominal sternites without discal setae, sternite with exceptional long posterior marginal setae (Fig.
Metasoma slender, tergite I 2.6 times as long as posteriorly broad, with convergent lateral carinae present only anteriorly; sternite I with an apically acute, thorn-like ventral projection posteriorly, tergite II-IV 1.2-1.4 times as long as posteriorly broad with presence of two smooth tubercles.
The family is characterised by the absence of trichobothria on the antennae; the presence of mostly symmetrical, unsegmented chitinous hooks at tip of abdomen; a maximum of four placoid sensilla on terminal article of antennae; thorax with two pairs of spiracles on sternites II and III; abdominal sternite 1 with a pair of styles and a pair of lateral subcoxal organs.
The genus Colpocephalum, as found on the Accipitriformes, is characterized by combs of short spiniform setae restricted to the venter of femora III and abdominal sternite III, but the ventral sclerites bearing setae between the vulva and anus are absent in females.
The larval stage of Ischyomius is known (author's collection and material borrowed from Jim McClarin) but is yet undescribed; it exhibits the following general features: body elongate, parallel-sided, only slightly flattened dorsoventrally; head with 5 stemmata (3 anterior and 2 posterior); urogomphal plate with dorsal tubercles and multiple inner teeth on urogomphi; sternite 9 with transverse row of asperities.
Remarks: Khaghaninia and Hosseini (2013) gave the following diagnostic characters of this species as sternite 4 and sternite 3 having equal length.
Remarks.--Species of Bisetocreagris can be identified by both the two small setae each on either side of the anteromedian groove of sternite III in the male (Jia et al.
To this purpose, 100 individuals were induced to expose their sternal gland stretching the abdominal sternite with a needle.
Caption: Figure 2--Male terminalia--Archytas marmoratus, (A) fifth sternite (ventral view), (B) genital complex (lateral view), (C) surstylus and cercus (posterior view); Archytas incertus, (D) fifth sternite (ventral view), (E) genital complex (lateral view), (F) surstylus and cercus (posterior view).
The pseudoscorpions were confirmed as nymphal stages including three tritonymphs and nine deutonymphs; they were positioned ventrally, attached to sternite II using both of their pedipalps.
Male: sternite IV with similar width and height; sternite V "V-shaped"; cercus and surstylus with almost the same length of the aedeagus.