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It is a member of the Megalurothrips genus-group with the following characters in common: Antennae 8-segmented, ocellar setae pair I present, median metanotal setae at anterior margin, metanotal spinula absent, abdominal tergite VIII with posteromarginal comb usually interrupted, sternal discal setae absent (Mound and Palmer, 1981).
Toma and Guimaraes (2000) suggested that Proparachaeta and Proparachaetopsis might be related genera based on shared similarities of the male terminalia, such as cercus beak-shaped in lateral view, aedeagus with broad acrophallus and basiphallus slightly bent upward, and hypandrial arms fused, but Proparachaeta differs from the latter by parafacials bare on basal two-thirds, postpronotal lobe with three basal postpronotal setae almost in line and one weaker anterior postpronotal seta usually in front of inner postpronotal seta, surstylus in lateral view almost straight throughout its length with margins slightly parallel-sided and apex rounded, and pregonite tapered subapically (for comparison see Toma and Guimaraes 2000: Figs.
Male and female flagellomeres barrel-shaped, with row of strong setae and circumfila appressed to flagellomeres (Figs.
cyprid swimming, we found that their thoracopods contained setae permanently cross-linked by fused setules.
Two long setae are observed on each side of the temple.
1C) about 3 times as long as wide, slightly tapering distally, with 7 setae located on distal third; setae I and VI shortest, subequal in length.
Orbital plate brown, the medial vertical setae is closer to lateral vertical setae and slightly toward the outer edge of the orbital plate, distance of or3 to or1, 64% (64%) of or3 to vtm (orbito-index, McEvey 1990), or1/or3 ratio 0.8 (0.8), or2/or1 ratio 0.8 (0.8), postocellar setae 29% (31%) and ocellar setae 81% (87%) of frontal length; vt index = 0.9 (0.9), vibrissal index = 0.6 (0.7).
The systematics and taxonomy of the family Theraphosidae have been heavily influenced by the presence and variations of stridulatory setae (Pocock 1895, 1897, 1899; Simon 1903; Perez-Miles et al.
Abdomen: Oblong, rounded at posterior; thick tergal plates, darkly pigmented; chaetotaxy scares specially in female characteristic; male terminalia deeply convex and medially concave in females; well developed subgenital plate having versatile arrangement of setae; genital opening dorsal in position.
Adults with setulose antennal flagellomere necks in both sexes, four-segmented palpi, reduced male mid-circumfila, toothed tarsal claw, male tergites 7 and 8, and female tergite 8 narrow, elongated, and without setae or scales.
Sternal shield is 165 (159-170) long, 162 (161-164) wide at the level coxae II and bearing three pairs of pilose setae and two pairs of pores: linea angulata and linea arcuata slightly curved with punctates, linea arcuata "M-shaped" with punctures; linea obiligue anterior with a smooth curved line; linea media transvera slightly curved, having small punctured on posterior; linea obilique posterior curved interiorly with punctures.
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