scapus


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scapus

[′skā·pəs]
(biology)
The stem, shaft, or column of a structure.

scapus

The shaft of a column.
References in periodicals archive ?
Description.--Large size, short head, wide round eyes, fastigium verticis as wide as or slightly wider than scapus of antennae, in contact with fastigium frontis, fronto-genal carinae very indistinct.
9d), a pointed, medial scapus (frequent in other species of the species-group) is almost absent (Fig.
For this study we used the protocol showed by Silva et al., which suggests: "Hold the animal using one hand, with its head between the index finger and the thumb; locate in the skull of the animal the region of external occipital crest; mark this point with a pen; obtain this measure taking as reference a media line from the end of the muzzle to the marked point of crest, using the scapus of the pachymeter to measure the external ends".
Fastigium slightly narrower than first antennal segment; forming a finger-like projection ending slightly before scapus when looked at from above.
Antenna 16-segmented; scapus, pedicellus and the first 4 flagellar segments oval and brown, others cylindrical and varying between brown to yellow.
Antenna with scapus and pedicellus brown; first flagellomere yellowish, brown at base; second, yellowish brown, the following brown.
Herbae perennes, erectae, 19-26 cm altae; folia omnia basalia, disticha, aequitantia, lineari-ensiformia, glabra, purpurea, basim versus 15-22 cm longa, folia vetera annulum ex fibris constatum basim versus formantia; scapus simplex, alatus, glaber, 17-24 cm longus, 0.5-1 mm latus, margine denticulatus versus apicem; spathae inaequales, geniculatae; tepala flava, elliptica, 8-10 mm longa, 2.5-4.5 mm lata; capsula nutans, sphaerica vel subsphaerica, glabra, 3.5-5 mm longa, 3-4 mm diametro; semina sphaerica vel subsphaerica, brunnea, 1-1.5 mm diametro, reticulata.
Sm, cui affinis, sed scapus rubrus, rache inflorescentiae rubra, ramis lateralibus brevioribus, bracteis floriferis irregulariter sulcatis, floribus longioribus pallide flavidis et petalis longioribus differt.
The most suitable method of measurement respects predetermined anatomic points, the use of the suitable scapus of pachymeter as well as its accuracy.