Ampulex compressa (Fabricius)
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publication ID |
https://doi.org/ 10.5281/zenodo.273517 |
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DOI |
https://doi.org/10.5281/zenodo.6256141 |
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persistent identifier |
https://treatment.plazi.org/id/A37A87D0-FFED-2D63-FD21-5DD8FB282781 |
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treatment provided by |
Plazi |
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scientific name |
Ampulex compressa (Fabricius) |
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Ampulex compressa (Fabricius) View in CoL
Last larval instar
Body: General body form as illustrated for Sphex tepanecus Saussure in Stehr (1987). Pale yellow, length ranging from 0.9 cm (penetrating larva) to 2.5 cm (fully fed mature larva), dorsoventrally compressed and rather flattened ventrally and rounded dorsally; more tapered anteriorly than posteriorly. Its maximum width ranged from 0.2 cm (penetrating larva) to 0.9 cm (fully fed mature larva) at fifth and sixth abdominal segments. Pleural lobes prominent. Most body segments divided into two annulets dorsally, integument slightly granulose. All spiracles brown and located inside pronounced depressions ( Fig. 1 View FIGURE 1 A). Spiracular atrium apparently unornamented; peritreme with five valvelike projections ( Fig. 1 View FIGURE 1 A). Anus terminal.
Head capsule: Subcircular; measuring 1.1 mm long and 1.0 mm in maximum width with distinct depressions in antennal and coronal regions ( Fig. 1 View FIGURE 1 B). Anterior tentorial arms and pleurostoma unpigmented and discrete, hypostoma dark brown, parietal bands feeble ( Fig. 1 View FIGURE 1 C). Depressions in clypeal region; metopic suture strongly pronounced and continuous with the frontal suture ( Fig. 1 View FIGURE 1 B). Antennal orbits discrete and circular (diameter = 40 μm), with 3 sensilla apically. Cephalic surface with few punctures, mainly concentrated in clypeal region and with a distinct group of 6 punctures in subgenal area (not shown).
Mouthparts: Labrum 562.6 ± 253.9 m (n=5) wide, strongly bilobed ( Fig. 1 View FIGURE 1 C, 1D), pigmented mesally and with 30–32 surface punctures, setae (8 m long) and basiconic sensilla (10 m diameter) ( Fig. 1 View FIGURE 1 D). Epipharynx densely spinulose mesally with 4 m spines directed apically, shorter spines present at the lobes’ extremities, but these are absent on the sensory area, which contains 8–10 scattered basiconic sensilla (7–8 m in diameter) ( Fig. 1 View FIGURE 1 E). Mandible is 418.2 ± 204.4 (n=4) m long, brown, darker at apex and articulations, bearing 4–5 teeth, with neither punctures nor setae ( Fig. 1 View FIGURE 1 C). Maxilla with few setae (about 12 m); its inner basal portion with flattened papillae margined with short spikes; lacinial area with 3–5 mlong spines ( Fig. 1 View FIGURE 1 F). Pigmented maxillary palpus stout, 60 m long x 55 m wide, with three basiconic sensillae apically; galea pigmented, 30 m long x 30 m wide (not shown). Salivary lips with a deep medial groove just above a transverse spinneret with prominent raised lips, margined with spoonlike papillae on the upper lip which also bears short spikes internally ( Fig. 2 View FIGURE 2 A). Labium about 329 m wide, and pigmented at the sides; bearing weakly pigmented, coneshaped, 47 m long x 61 m wide labial palpi ( Fig. 1 View FIGURE 1 C), culminating in three basiconic sensilla (not shown). Labiobase with few 9 m long setaceous sensilla ( Fig. 2 View FIGURE 2 A).
Examined material: Two entire larvae and three head capsules, two analysed with a light microscope and one by scanning electronic microscopy.
Second larval instar
Body: light yellow, measuring 6.5 mm in maximum length and 3.0 mm in width, dorsoventrally compressed and with evident segmentation ( Fig. 2 View FIGURE 2 B). Pleural lobes pronounced, spiracular depressions present. Integument wholly covered with short spines (not shown).
Head capsule: Mainly unpigmented; 2.0 mm long x 1.9 mm in maximum width. Coronal suture continuous with frontal suture ( Fig. 2 View FIGURE 2 C). Antennal orbits very inconspicuous with three sensilla (not shown). A distinct group of 6 punctures on subgenal area; parietal bands indistinguishable; hypostoma, pleurostoma and anterior tentorial arms pigmented, epistoma well defined and also pigmented ( Fig. 2 View FIGURE 2 C).
Mouthparts: Labrum about 500 m wide, with 18–20 punctures ( Fig. 2 View FIGURE 2 C). Spines at middle of epipharynx, directed apically. Maxilla unpigmented, lacking setae. Mandible about 263 m long, bearing 3 teeth and various spinelike denticles; labium unpigmented and very simple, 230 m wide ( Fig. 2 View FIGURE 2 C).
First larval instar
Body: white and cylindrical, 3.0 mm long x 0.8 mm wide, with evident segmentation ( Fig 2 View FIGURE 2 D). Pleural lobes slightly pronounced in thoracic region, spiracles brown (not shown). Body covered with 1–2 μm spines, more densely so at posterior portion and intersegmental areas ( Fig. 2 View FIGURE 2 D—detail).
Head capsule: Mostly unpigmented, except for brown maxillary scleromes, epistoma and pleurostoma. Mouthparts greatly reduced: labrum about 100 m wide with 9–10 punctures, mandible pigmented (172 m long) with 3 teeth, maxilla with no setae; labium unpigmented and very reduced ( Fig. 2 View FIGURE 2 D).
Cocoon
Wall composed of two distinct layers: a silky outer one and a sturdy dark brown internal one. Inner surface shiny black and smooth (not shown). Walls apparently composed of spherical grains embedded in some kind of secreted matrix ( Fig. 2 View FIGURE 2 E).
Egg
White, cylindrical, not curved, with rounded extremities; 2.5 mm length x 0.7 mm width. Micropyle appears as a punctured area on the anterior extremity ( Fig. 2 View FIGURE 2 F).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.