aculeus


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aculeus

[ə′kyü·lē·əs]
(invertebrate zoology)
A sharp, hairlike spine, as on the wings of certain lepidopterans.
An insect stinger modified from an ovipositor.
References in periodicals archive ?
The medial surstylus is apparently used to hold the aculeus when she extends it.
The female raises her ovipositor and everts her aculeus from the eversible membrane and the male grasps it with his genitalic surstyli.
Ceratolithoides aculeus (Stradner, 1961) Prins et Sissingh in Sissingh, 1977
Referencias o atribuciones: 1--Worsley y Martini (1970); 2--Bukry (1973); 3--Thierstein (1976); 4--Wise y Wind (1977); 5--Wind (1979); 6--Perch-Nielsen (1979); 7--Thierstein, 1981; 8--Doeven (1983); 9--Wise (1983); 10--Wagreich (1987); 11--Pospichal, Wise (1990); 12--Watkins (1992); 13--Lamolda y Gorostidi (1994); 14--Burnett (1998); 15--Ovechkina y Alekseev (2002); 16--Melinte, Lamolda y Kaiho (2003) warm-water taxa (lower and middle latitudes) Previous attribution 1 2 3 4 5 6 7 8 Biscutum constans + Ceratolithoides aculeus + + Cretarhabdus surirellus + Cylindralithus serratus + + Lithraphidites canuolensis + L.
4 + 5] setulose over all its length, and very short posteroapical lobe of cell bcu; femora without long or thickened setae; oviscape simple, slightly curved dorsally and densely setulose at its apex but bearing no sclerotized hooks; elongate, apically barbed, arrow-like aculeus in female; posteriorly directed finger-like surstyli in male.
11, 13), ventral surface slightly granular; dorsal surface smooth, with a well developed median glandular depression in males; aculeus very short and curved.
Aculeus long, 73-80% ([male]) to 81-85% ([female]) of vesicle length (Table 1), strongly curved.
Telson with axial carina that terminates in a rhomboidal subaculear tubercle that is curved towards the aculeus and exhibits two small dorsal granules; aculeus strongly curved.
Telson almost completely smooth, except for some granules located on the position of the axial carina; subaculear tubercle strong and spine-like; aculeus long and curved.
Telson: vesicle faintly spotted on ventral surface, aculeus densely pigmented.
Telson: Aculeus represents 1/4 total length; ventral surface with 11 pairs of regular setae, not covered with long fine hairs.
Telson: Sparsely granular; vesicle with rounded ventral surface; aculeus slightly curved, of the same length as the vesicle (Figs.