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S

 

scape                                       First antennal segment.

scarabaeiform                      Applied to larva, to have a thick body, strong legs on thorax and well developed head, lamellicorn beetle larvae.

sclerite                  The individual hard plates that form the exoskeleton.

scopa                    Can be the brush setae or the pollen basket of bees used to collect pollen. Located on the abdominal terga 

                                                in Megachilidae.  [see picture]

scopula                  Small tuft of setae.

scutellary striole.                            A shortened stria or puncture row lying just laterad of the scutellum but not extending very far posteriorly.

scutellum.                                         The posterior portion of the mesoscutum, which in beetles usually fits in between the bases of the elytra and

                                               may be part of an elytral locking mechanism. The third and major division of the dorsal surface of a thoracic

                                               segment.  [picture for Coleoptera]    [picture for Hemiptera]

serrate                                     Notched or toothed on the edge.

serrate antenna.                             Antenna in which most antennomeres project slightly in one direction forming a more or less acute process,

                                                giving the antenna a saw-like appearance.

sessile                                     Attached directly by the base; not raised upon a stalk.

setose                                      Bristly.

setula, setulose, setulae             Short blunt setae or bristle-like hair.

sinuate                                     Having the margin wavy with strong indentations.

somites                                                One of the longitudinal series of segments into which the body of many animals is divided. (metamere)

spiculum gastrale.                          Narrow strut attached to the anterior end of sternite 9 and serving as a muscle attachment.

spinose                                    Spiny. Covered with spines.

stabilmentium                         A zig-zag ribbon of silk spun across the center of the web of some orb-weaving spiders.

staphylinoid aedeagus.               Aedeagus in which the parameres and penis are well developed but the phallobase is reduced to a narrow strip of

                                                cuticle or membrane only; in the latter case the parameres appear to be joined directly to the penis and the

                                                aedeagus resembles the adephagan type.

stria.                                                      A fine, longitudinal impressed line on the elytra, often containing punctures.

stridulatory file                                (of mesoscutum). A shiny area on the mesoscutum of Megalopodidae, Disteniidae, Vesperidae, many Cerambycidae and some Nemonychidae which contains many very fine transverse ridges (visible only under very high magnifications) and acts with a plectrum on the hind edge of the pronotum to produce a sound.

strut.                                                     A rod-like structure to which muscles are attached.

subantennal groove.                     Groove or concavity usually lying below the antennal insertion and sometimes extending posteriorly along the ventral portion of the head.

subcubital fleck.                              See Medial fleck.

subglabrous.                                     Bearing very short and fine and/or scattered setae only, and so appearing glabrous under lower magnifications.

subgenal ridges.                            A pair of sharp longitudinal ridges extending from the maxillary articulations to the posterior region of the head and usually forming the lateral edges of a concavity. The subgenal ridges usually occur in conjunction with a strongly declined head and fit against the procoxae when the head is at rest.

subscutellum                                   A thoracic plate esp. in Dipera. Well developed defines the family Tachinidae. (Fig. 39.5 I of A)

sulcus                                                  Furrow or groove. A shallow furrow of the surface of the brain separating adjacent convolutions.

supra-anal plate                             The last abdominal tergite covering the anus from above.

sutural stria.                                     The elytral stria closest to the suture.

suture.                                                 A joint or impressed line. Traditionally indicating the meeting of two major body segments, but often used also for an invagination of an internal endocarina or apodeme. See Elytral suture.

swimming hairs.                             Relatively long and dense hairs located on the mid and hind legs of some aquatic beetles which aid in swimming.

sympatric                                           Occupying the same range, occuring in the same area.