Nesocerus, FREYTAG & KNIGHT, 1966
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publication ID |
https://doi.org/ 10.1111/j.1096-3642.2010.00690.x |
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DOI |
https://doi.org/10.5281/zenodo.10545760 |
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persistent identifier |
https://treatment.plazi.org/id/D929AD54-196D-C51A-F906-FD2EFEF1F8D4 |
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treatment provided by |
Valdenar |
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scientific name |
Nesocerus |
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GENUS NESOCERUS FREYTAG & KNIGHT, 1966 View in CoL
Type species Nesocerus spurus, Freytag & Knight , by original designation.
Description
Length of male, 3.25–6.6 mm; female, 4–7 mm.
Ochraceous with black markings on crown, pronotum, mesonotum, and face. Forewings with basal half fuscous, with markings along middle or costal margin. Leg yellowish or stramineous; usually with black markings along margins.
Head wider than pronotum. Length of scutum almost equal to combined length of crown and pronotum. Head, pronotum, and scutum shagreened. Antennae not expanded apically or subapically. Ocelli on face equidistant from imaginary midline and inner margin of compound eye. Frontoclypeus wider than length. Laterofrontal sutures extending to corresponding ocellus, more or less straight. Clypeogenal suture not reaching antennal ledge. Lorum not extending to apex of clypellus; usually separated from facial margin throughout length. Clypellus usually constricted at middle. Pronotum with hind margin straight. Forewings with three apical cells bordering broad appendix; with two subapical cells, first cell open, second cell open or closed; clavus with two veins. Hind femur setal formula 2 + 1 (in Nesocerus serratus sp. nov. 2 + 0). Hind tibia flattened. Hind tarsomere I without dorsoapical setae, with two ventral longitudinal rows of short setae, pecten with lateral setae longer than platellae ( Fig. 2A, B View Figure 2 ).
Male pygofer with long or short posterodorsal process; posterolateral margin with setae; dorsolateral fold absent. Anal segment loosely attached to pygofer. Subgenital plate dorsoventrally flattened, longer than pygofer; in ventral aspect narrowed
Head
1 Microsculpture of head: 0, shagreened; 1, striate
2 Microsculpture of pronotum: 0, shagreened; 1, striate
3 Presence of produced pronotum: 0, present; 1, absent
4 Markings on pronotum: 0, single spot; 1, pair of spots along imaginary transverse line; 2, mottled; 3, longitudinal bands; 4, absent
5 Lateral spot on vertex: 0, absent; 1, present
6 Laterofrontal suture: 0, present; 1, absent
7 Laterofrontal suture: 0, reaching ocelli; 1, not reaching ocelli
8 Clypeogenal suture extending to antennal ledge: 0, extending; 1, not extending
9 Setae on genal margin just ventrad of each eye: 0, absent; 1, present
10 Genae narrow: 0, narrow; 1, broad
11 Median width of lora: 0, same as midwidth of clypellus; 1, narrower; 2, broader
12 Lorum apex: 0, widely separated from genal margin; 1, not widely separated
13 Shape of lora: 0, hemispherical; 1, almost straight (apex not well defined)
14 Median marking on lora: 0, present; 1, absent
15 Position of maxillary sensory pit: 0, slightly above diagonal line from clypellus suture to lora; 1, in diagonal from clypellus suture; 2, below diagonal line from clypellus suture to lora; 3, at lowermost part of maxillary plate
16 Base of clypellus: 0, as broad as apex or preapex; 1, narrower than apex; 2, wider base
17 Posterior region of clypellus: 0, not depressed; 1, slightly depressed; 2, strongly depressed
18 Clypellar suture: 0, complete; 1, incomplete
Leg
19 Hind setae formula: 0, 2 + 0; 1, 2 + 1
20 Basal processes of tibial spine: 0, absent; 1, present
21 Number of dorsoapical setae on first hind tarsomere: 0, two; 1, absent
22 Presence of two longitudinal rows of ventral setae on first hind tarsomere: 0, present; 1, absent
23 Pecten of first hind tarsomere with lateral setae longer than median ones: 0, longer; 1, almost same length
24 Shape of hind tibia: 0, flattened; 1, rectangular in cross section
Forewing
25 Number of apical cells bordering appendix: 0, two; 1, three
26 Subapical cell: 0, present; 1, absent
27 Presence of third subapical cell: 0, absent; 1, present
28 Forewing with third apical cell: 0, parallel; 1, diverging
29 Forewing with second apical cell: 0, diverging; 1, parallel; 2 converging
30 Presence of appendix: 0, present; 1, absent
Male genitalia
31 Anal collar: 0, present wide; 1, present, narrow
32 Ventra extension of anal collar: 0, present; 1, absent
33 Setae on pygofer: 0, absent or very short; 1, present
34 Pygofer process: 0, absent; 1, present
35 Shape of pygofer process: 0, posterodorsal, falcate, elongate; 1, posterodorsal falcate with ventral process; 2, tooth-like; 3, basiventral arising dorsally; 4, basiventral arising ventrally, apex curved; 5, posteroventral, extending dorsad
36 Orientation of tooth-like process: 0, posterad; 1, mesad; 2, dorsad
37 Apex of posterodorsal process: 0, elongate, attenuate; 1, elongate, blunt tip; 2, abruptly tapered and hooked; 3, distinctly bent ventromesad; 4, short and broad; 5, forked; 6, curved ventrad with dorsal process
38 Macrosetae subgenital plate: 0, absent; 1, present
39 Position of macrosetae: 0, submarginal; 1, mesal; 2, both submarginal and mesal; 3, median; 4, restricted to base; 5; restricted to apex
40 Submarginal macrosetae: 0, extending more than half of length of subgenital plate; 1, restricted to apical half
41 Submarginal row of macrosetae: 0, biseriate or multiseriate; 1, uniseriate
42 Mesal row extending: 0, extending beyond half; 1, restricted to half
43 Truncate apex of subgenital plate: 0, present; 1, absent
44 Apex of subgenital plate: 0, abruptly curved dorsad; 1, not curved
45 Fine setae: 0, present long; 1, short
46 Lobe that attaches to style: 0, well developed and produced; 1, poorly developed or absent
47 Subgenital plate: 0, dorsoventrally compressed; 1, dorsolaterally compressed
48 Mesal margin of subgenital plate expanded or pointed at the middle: 0, present; 1, absent
49 Style apodeme: 0, narrow 1, broad and ray-like markings
50 Style apex: 0, acute; 1, acuminate; 2, hooked; 3, foot-like; 4, broad, abruptly curved dorsad with processes; 5, broad with ventral process; 6, hooked ventrad; 7, expanded apically
51 Lateral lobe on inner margin of style: 0, absent 1, present
52 Presence of long setae on style: 0, present; 1, absent; 2, present on dorsal hump
53 Spines on style apex: 0, present; 1, absent
54 Presence of short setae on style: 0, present along dorsal or dorsolateral margin; 1, present along ventral surface; 2, absent
55 Texture of ventral margin of apophysis of style: 0, smooth; 1, serrated
56 Presence of spine on ventral margin of style posterad of joint with connective: 0, present; 1, absent 57 Connective 0, V-shaped; 1, U-shaped; 2, U-shaped with short median arm; 3, T-shaped with long arm; 4, T-shaped with short arm
58 Anterior margin of U-shaped connective: 0, deeply concave; 1, narrowly concave
59 Connection of aedeagus with connective: 0, articulate; 1, fused
60 Keel on connective: 0, absent; 1, two; 2, one
61 Presence of anterior projection on connective: 0, absent; 1, present
62 Presence of apical processes: 0, present; 1, absent; 2, reduced to spine
63 Number of apical processes: 0, paired symmetrical; 1, paired asymmetrical; 2, two pairs; 3, more than two pairs
64 Position of gonopore with respect to that of apical processes: 0, above processes or at extreme apex; 1, below processes
65 Aedeagus pustulate: 0, absent; 1, present towards apex, with prominent macrosetae along margin, fine setae long or short, restricted to dorsum of apex and along lateral margin. Style without lateral lobe, apophysis curved dorsally. Connective semicircular with two dorsal keels, T-, V-, or Y-shaped; articulated or fused to basal part of aedeagus. Aedeagus with socle developed or not; shaft cylindrical or laterally compressed, extending dorsad or anterodorsad, with or without apical or basal processes. Gonopore apical or subapical.
Female ovipostitor extending beyond pygofer. First valvulae blade-shaped, curved slightly dorsally with strigate dorsal sculptured area.
Distribution: Widely distributed in Madagascar.
Discussion: The genus can be distinguished by the following combination of characters: forewing with three apical cells bordering appendix; hind tarsomere I without pair of dorsoapical setae, plantar surface of hind tarsomere I with two ventral longitudinal rows of short setae, platellae shorter than lateral setae; subgenital plate depressed with macrosetae on ventral surface.
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