Andraegoidus Aurivillius, 1920

R, Juan Pablo Botero & Monné, Marcela L., 2012, Revision of the genus Andraegoidus Aurivillius (Insecta: Coleoptera: Cerambycidae), Zootaxa 3169 (1), pp. 1-60 : 5-14

publication ID

https://doi.org/ 10.11646/zootaxa.3169.1.1

persistent identifier

https://treatment.plazi.org/id/B2269A30-FF97-DF47-FF5E-FD1CFA00F959

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Felipe

scientific name

Andraegoidus Aurivillius, 1920
status

 

Andraegoidus Aurivillius, 1920 View in CoL

Andraegoidus Aurivillius, 1920: 369 View in CoL ; Hüdepohl, 1985: 39 (reval.); Monné, 1994: 86 (cat.); Monné & Giesbert, 1995: 142 (check); Monné, 2005: 581 (cat.); Monné & Bezark, 2010: 150 (check).

Type-species. Andraegoidus humeralis Aurivillius, 1920 View in CoL (monotypy) [= Trachyderes cruentatus Dupont, 1838 View in CoL ].

Head with fine, shallow punctures; two longitudinal carinae between the antennal tubercles. Antennal tubercles elevated and directed posteriorly. Frons short, transverse and depressed, deeper at sides. Sides of head, near outer margin of the lower ocular lobes, with oblique elevation. Eyes finely faceted; connection between upper and lower lobes with about three rows of ommatidia; lower ocular lobe subtriangular. Submentum with long and short, dense and whitish hairs, coarse and dense punctation. Genae projected, rounded, shorter than mandibles, with slightly coarse punctures. Mandibles with outer margin curved, adorned with longitudinal grooves, apices with short hairs, apices smooth and glabrous. Males with antennae filiform, 11 or 12– segmented; segments flattened dorso-ventrally, gradually narrowed to apex, smooth; females with antennae serrate, 11– segmented; segments gradually decreasing in length. Outer margin of segments IV–X and apical ¼ of segment III with longitudinal carina.

Prothorax wider than long, strongly swollen in males and with sexually dimorphic punctation. Sides of prothorax rounded and with two tubercles, one antemedian and the other postmedian, the first usually more evident in females. Disc of pronotum smooth ( Figs 1–2 View FIGURES 1–2 ), with transverse carina interrupted by a median elevation; at each side of carina with an oblique elevation directed anteriorly; and with two elevations posterior to carina. Prosternum with transverse sulcus, median and deep; anterior margin with a median tubercle. Prosternum with intercoxal process subparallel, laterally with long, erect, whitish hairs; posterior region slightly projected and distinctly excavated below. Mesosternum depressed, with long whitish hairs. Mesepisternum, mesepimerum and metepisternum with dense, decumbent, whitish pubescence. Mesepimerum with elevated lateral margin. Metasternum with long whitish hairs, denser in lateral regions; metasternal suture almost reaching anterior margin and the latter with a slight depression. Metepisternum excavated anteriorly; narrowed apically, with a poorly developed glandular pore and without differentiated area.

Scutellum lanceolate. Elytra convex transversely, twice as long as broad and glabrous or with some microhairs restricted to apices. Humeri rounded, slightly projected anteriorly, with open depressions in anterior region.

Legs short, metalegs about ¼ longer than prolegs. Trochanters, ventrally with tuft of long, whitish hairs. Femora subclavate, not pedunculate, flattened laterally; meso- and metafemora with internal apex slightly projected; basal half of metafemora with rows of short and dense hairs. Tibiae subcylindrical, as long as femora, gradually expanded to apex. Tibiae with ventral surface pubescent, denser at apices. Tibial spurs divergent, outer spurs shorter than internal spurs. Tarsi short; metatarsomere I as long as II. Sternites I–V with fine and sparse punctures; sternites with long, short, sparse, whitish hairs, denser in lateral regions.

Male terminalia: tergite VIII ( Figs 47 View FIGURES 46–55 , 77 View FIGURES 76–85 , 107 View FIGURES 106–115 , 140 View FIGURES 139–148 , 173 View FIGURES 172–181 , 203 View FIGURES 202–211 ) subrectangular, apical third including margin with long hairs; ventral arc ( Figs 48 View FIGURES 46–55 , 78 View FIGURES 76–85 , 108 View FIGURES 106–115 , 141 View FIGURES 139–148 , 174 View FIGURES 172–181 , 204 View FIGURES 202–211 ) fork-shaped; dorsal arc ( Figs 49 View FIGURES 46–55 , 79 View FIGURES 76–85 , 109 View FIGURES 106–115 , 142 View FIGURES 139–148 , 175 View FIGURES 172–181 , 205 View FIGURES 202–211 ) reduced and membranous; tegmen ( Figs 50–52 View FIGURES 46–55 , 80–82 View FIGURES 76–85 , 110–112 View FIGURES 106–115 , 143–145 View FIGURES 139–148 , 176–178 View FIGURES 172–181 , 206–208 View FIGURES 202–211 ) with distal region divided into parameres; parameres with dense hairs apically; median lobe ( Figs 53–55 View FIGURES 46–55 , 83–85 View FIGURES 76–85 , 113–115 View FIGURES 106–115 , 146–148 View FIGURES 139–148 , 179–181 View FIGURES 172–181 , 209–211 View FIGURES 202–211 ) slightly curved in lateral view.

Female terminalia: tergite VIII ( Figs 56 View FIGURES 56–58 , 86 View FIGURES 86–88 , 116 View FIGURES 116–118 , 149 View FIGURES 149–151 , 182 View FIGURES 182–184 , 212 View FIGURES 212–214 ) about twice as long as broad, divided into a central hemitergite and two lateral hemitergites overlapping the central hemitergie’s board apical margin with acicular, long and denser hairs; posterior region of sternite VIII ( Figs 43–44 View FIGURES 40–45 , 72 View FIGURES 68–75 , 102 View FIGURES 98–105 , 135–136 View FIGURES 131–138 , 168 View FIGURES 164–171 , 198 View FIGURES 194–201 ) formed by aciculate, conchoidal and petiolate setae, arranged in several rows. Ovipositor ( Figs 57–58 View FIGURES 56–58 , 87–88 View FIGURES 86–88 , 117–118 View FIGURES 116–118 , 150– 151 View FIGURES 149–151 , 183–184 View FIGURES 182–184 , 213–214 View FIGURES 212–214 ) with short, subcylindrical lateral lobes; apical styli cylindrical; vulva membranous, longitudinally plicate; apodemes at common oviduct base, straight.

Discussion. Aurivillius (1920) provided a detailed description of the genus Andraegoidus and Hüdepohl (1985) improved the original description. We support the characteristics listed for the genus by these authors, except two cited by Hüdepohl (op. cit.): segment III with coarse punctures and elytra gradually narrowed to the apex. We note that there is variation in the punctation of segment III, from fine to coarse, and the elytra in Andraegoidus richteri are subparallel in anterior ¾. Here we add new characteristics related mainly to the pilosity and punctation exhibited in the venter and terminalia.

Aurivillius (1920) considered the genus Aegoidus Buquet, 1838 similar to Andraegoidus , and distinguished Aegoidus by the presence of spines in the femora and the appearance of the prothorax, without explaining the differences between the two genera. We add that the pronotum of Aegoidus has five tubercles: two antemedian and three postmedian.

Hüdepohl (1985) considered Andraegoidus similar to Chydarteres Hüdepohl, 1985 ; Drychateres Hüdepohl, 1985 ; and Seabraellus Hüdepohl, 1985 . Chydarteres was distinguished by the presence of a tubercle in the anterior margin of the prosternal sulcus, which is strongly projected and curved towards the apex, while in Andraegoidus the tubercle is slightly projected and not curved. Drychateres was distinguished by possessing a sharp projection in the anterior region of the prosternal process, with a projected and curved tubercle in the anterior margin of the prosternal sulcus, while Andraegoidus lacks the sharp projection. Seabraellus was distinguished by the absence of the tubercle in the prosternal sulcus and by the sexually dimorphic punctation in males restricted to the prosternum, while Andraegoidus always has the tubercle in the prosternal sulcus and sexual punctation not restricted to the prosternum.

The tribe Trachyderini includes 132 Neotropical genera ( Monné & Bezark, 2010) and, despite the large number of genera and species, a subgroup of genera within the tribe have the following characteristics in common: antennae filiform and long in males; pronotum with elevations and depressions (never with five clear tubercles); prosternum with transverse sulcus; elytra as much as four times the length of the prothorax, without carinae and generally with shiny surface. The following genera share these characteristics: Andrachydes Hüdepohl, 1985 ; Andraegoidus ; Chydarteres ; Deretrachys Hüdepohl, 1985 ; Dicranoderes Dupont, 1836 ; Drychateres ; Martinsellus Hüdepohl, 1985 ; Monneellus Hüdepohl, 1985 ; Retrachydes Hüdepohl, 1985 ; Seabraellus ; and Trachyderes Dalman, 1817 .

Andraegoidus can be differentiated from the genera listed above by the following characters: upper eye lobes connected with the lower eye lobes; antennae of males without granules; prothorax, in males, with clear sexual punctation; pronotum with transverse carina elevated and interrupted by a median elevation; deep prosternal sulcus; anterior margin of prosternal sulcus with median tubercle not projected or curved at apex; elytra glabrous or with some microhairs restricted to apex; and femora not pedunculate.

In Andraegoidus , we studied the male and female terminalia of the following species: A. cruentatus ( Figs 43– 58 View FIGURES 40–45 View FIGURES 46–55 View FIGURES 56–58 ), A. homoplatus ( Figs 72–88 View FIGURES 68–75 View FIGURES 76–85 View FIGURES 86–88 ), A. rufipes ( Figs 198–214 View FIGURES 194–201 View FIGURES 202–211 View FIGURES 212–214 ), A. fabricii ( Figs 168–184 View FIGURES 164–171 View FIGURES 172–181 View FIGURES 182–184 ), A. richteri ( Figs 135–151 View FIGURES 131–138 View FIGURES 139–148 View FIGURES 149–151 ) and A. variegatus ( Figs 102–118 View FIGURES 98–105 View FIGURES 106–115 View FIGURES 116–118 ). Terminalia were compared within the species of the genus as well as with the type-species of other genera considered similar to Andraegoidus : Chydarteres bicolor (Voet, 1778) ( Figs 3–15 View FIGURES 3–12 View FIGURES 13–15 ), Drychateres bilineatus ( Olivier, 1795) ( Figs 16–27 View FIGURES 16–24 View FIGURES 25–27 ), and Seabraellus gracilis Hüdepohl, 1985 ( Figs 28–39 View FIGURES 28–36 View FIGURES 37–39 ). We also compared Trachyderes (Trachyderes) succinctus succinctus (Linnaeus, 1758) ( Fragoso et al., 1987, Fig. 2 View FIGURES 1–2 ), considering that it is the type-species of the tribe type-genus. Although the terminalia of all species were not studied, many morphological structures were common among all species, which are included in the redescription of Andraegoidus below. Some characters which vary in other genera where not included since they may also vary within Andraegoidus . The variable characters not included are found in the male terminalia: sternite VIII ( Figs 46 View FIGURES 46–55 , 76 View FIGURES 76–85 , 106 View FIGURES 106–115 , 139 View FIGURES 139–148 , 172 View FIGURES 172–181 , 202 View FIGURES 202–211 ) with short sternal apophysis; ventral arc ( Figs 48 View FIGURES 46–55 , 78 View FIGURES 76–85 , 108 View FIGURES 106–115 , 141 View FIGURES 139–148 , 174 View FIGURES 172–181 , 204 View FIGURES 202–211 ) with short apophysis; dorsal arc ( Figs 49 View FIGURES 46–55 , 79 View FIGURES 76–85 , 109 View FIGURES 106–115 , 142 View FIGURES 139–148 , 175 View FIGURES 172–181 , 205 View FIGURES 202–211 ) adorned with short hairs; ventral lobe ( Figs 53–55 View FIGURES 46–55 , 83–85 View FIGURES 76–85 , 113– 115 View FIGURES 106–115 , 146–148 View FIGURES 139–148 , 179–181 View FIGURES 172–181 , 209–211 View FIGURES 202–211 ) longer than dorsal lobe.

It is interesting to note that in males of Chydarteres bicolor , sternite VIII ( Fig. 3 View FIGURES 3–12 ) possess lateral projections which are also found in Ancylocera cardinalis ( Dalman, 1823) (Ancylocerina) ( Monné & Napp, 2000, Fig. 54 View FIGURES 46–55 ).

The use of scanning electron microscope (SEM) to study the prothorax revealed new morphological characters. In the pronotum, we observed that the appearance of the indentations is similar to the previous work that studied the sexually dimorphic punctation in other groups of Cerambycidae (e.g., Noldt et al., 1995; Monné, 2005; Nearns & Ray, 2006; Ray et al., 2006). We also observed common characteristics among the species studied: surface of the prothorax alveolate, with deep and rounded indentations; indentations with number of pores variable; between the indentations are scattered points that may have a small seta which is generally curved at apex.

Based on characters of the male prothorax, mainly of the pronotum, Hüdepohl (1985) recognized three groups of species in Andraegoidus : the first group was characterized by the strongly swollen prothorax, its octagonal shape and by the pronotum mostly covered with sexually dimorphic punctation. This group was composed of (names used by Hüdepohl (op. cit. )): A. cruentatus , A. homoplatus homoplatus , A. homoplatus hassenteufeli and A. distinguendus . The second group was characterized by having the prothorax strongly swollen in the anterior region, postmedian tubercle strongly developed and posterior half of pronotum slightly punctate; this group was composed of: A. lacordairei lacordairei , A. lacordairei punctipennis and A. variegatus . Finally, a third group was characterized by the presence of robust lateral tubercles with the antemedian tubercles generally strongly developed; pronotum with sparse punctation, posterior region and postmedian elevations smooth; this group was composed of A. rufipes and its subspecies.

Since we did not find uniformity among the morphological characters, we do not recognize Hüdepohl’s species groups. In the first group, not all the studied specimens of Andraegoidus homoplatus showed the sexual punctation described by Hüdepohl (1985) and in some cases punctation similar to A. lacordairei ( Figs 89 View FIGURES 89–97 , 192 View FIGURES 185–193 ) was observed. In the second group, we observed variation in the proposed sexually dimorphic punctation. In the third group, the antemedian tubercle can be much reduced or absent in A. rufipes ( Figs 215–226 View FIGURES 215–226 ); some specimens of A. fabricii have abundant sexually dimorphic punctation ( Figs 157–163 View FIGURES 152–163 ) and in A. richteri most specimens examined have punctures in the postmedian elevations ( Figs 152–156 View FIGURES 152–163 ).

The presence and distribution of punctures on the elytral surface support the creation of two groups within Andraegoidus , especially considering that this character was constant in all the specimens studied for males and females. In the first group, species have elytra surface covered with dense and uniformly distributed punctation: A. cruentatus , A. homoplatus and A. laticollis . In the second group, species have the elytral surface smooth or with sparse punctures, concentrated mainly in the anterior region: A. distinguendus , A. fabricii , A. lacordairei , A. translucidus , A. variegatus , A. richteri and A. rufipes .

Key to the species of the genus Andraegoidus View in CoL

Males.

1. Surface of elytra covered with dense and uniformly distributed punctuation........................................ 2

- Surface of elytra smooth or with sparse punctures, concentrated mainly in anterior region............................ 4

2 (1). Antennae exceeding elytral apices at least at segment X; prothorax with confluent sexually dimorphic punctation. Figs 59–65 View FIGURES 59–67 . Brazil (RS), Paraguay, Argentina View in CoL , Uruguay.......................................... A. cruentatus ( Dupont, 1838) View in CoL

- Antennae exceeding elytral apices at segments VII or VIII; sexually dimorphic punctation not confluent................. 3

3 (2). Prothorax strongly swollen, without lateral tubercles; elytra black. Figs 66–67 View FIGURES 59–67 . Colombia....... A. laticollis Tippman, 1953 View in CoL

- Prothorax not swollen, with at least one pair of lateral tubercles; elytra brown to black with red at base. Figs 89–91 View FIGURES 89–97 . Brazil (MT, GO, DF, Paraíba to Minas Gerais, PR), Paraguay, Argentina View in CoL , Uruguay............... A. homoplatus ( Dupont, 1838) View in CoL

4 (1). Pronotum with dense, erect, long, whitish hairs; scutellum with long, sparse, whitish hairs. Figs 92–95 View FIGURES 89–97 . Brazil (MG).................................................................................. A. distinguendus Hüdepohl, 1985 View in CoL

- Pronotum glabrous or with some sparse hairs; scutellum glabrous............................................... 5

5 (4). Antennae exceeding elytral apices at segment XI. Figs 96–97 View FIGURES 89–97 . Bolivia............. A. translucidus Botero & Monné, 2011 View in CoL

- Antennae exceeding elytral apices at segments VIII or IX...................................................... 6

6 (5). Prosternal process with a distinct tubercle directed to anterior margin of prosternal sulcus ( Fig. 130 View FIGURES 119–130 ), scape expanded from base. Figs 119–130 View FIGURES 119–130 . Brazil (MT, MS, GO, PA, Ceará to Rio Grande do Sul), Peru, Bolivia, Paraguay, Argentina View in CoL , Uruguay................................................................................... A. variegatus ( Perty, 1832) View in CoL

- Prosternal process without distinct tubercle, scape gradually expanded to apex..................................... 7

7 (6). Prothorax with coarse sexually dimorphic punctation; pronotum with antemedian tubercle always evident, postmedian elevations high and distinctly rounded at top; elytra subparallel at least in anterior ¾. Figs 152–156 View FIGURES 152–163 . Bolivia, Paraguay, Argentina View in CoL ........................................................................ A. richteri ( Bruch, 1908) View in CoL status nov.

- Prothorax with fine sexually dimorphic punctation; pronotum with antemedian tubercle evident or not, postmedian elevations different; elytra gradually narrowed to apex.................................................................8

8 (7). Prothorax enlarged anteriorly; pronotum with antemedian tubercle strongly developed (subequal to postmedian tubercle). Figs 157–163 View FIGURES 152–163 . Brazil (MT, MS, GO, Maranhão to Bahia, SP View in CoL )......................... A. fabricii ( Dupont, 1838) View in CoL status nov.

- Prothorax narrowed anteriorly; pronotum with antemedian tubercle reduced and generally absent....................... 9

9 (8). Pronotum mostly covered with sexually dimorphic punctation and with postmedian tubercle slightly elevated and at right angle to body axis. Figs 185–193 View FIGURES 185–193 . Venezuela, Brazil (PA), Trinidad and Tobago.................. A. lacordairei ( Dupont, 1838) View in CoL

- Pronotum with sexually dimorphic punctation less extensive and with postmedian tubercle elevated and slightly directed posteriorly. Figs 215–226 View FIGURES 215–226 . Brazil ( Bahia View in CoL to Rio Grande do Sul), Bolivia, Paraguay, Argentina View in CoL ....... A. rufipes ( Fabricius, 1787) View in CoL

Females.

1. Surface of elytra covered with dense and uniformly distributed punctuation....................................... 2

- Surface of elytra smooth or with some sparse punctures, concentrated mainly in anterior region........................ 3

2 (1). Surface of pronotum smooth or with some shallow punctures restricted to postmedian elevation of carina; elytra brown or brownish-orange with a black spot in the posterior half. Figs 59–65 View FIGURES 59–67 . Brazil (RS), Paraguay, Argentina View in CoL , Uruguay......................................................................................... A. cruentatus ( Dupont, 1838) View in CoL

- Surface of pronotum rugose and/or with coarse punctures; elytra from black with a brown spot in basal 1/4 to light brown with four longitudinal lines clearer. Figs 89–91 View FIGURES 89–97 . Brazil (MT, GO, DF, Paraíba to Minas Gerais, PR), Paraguay, Argentina View in CoL , Uruguay............................................................................ A. homoplatus ( Dupont, 1838) View in CoL

3 (1). Pronotum with dense, erect, long, whitish hairs; scutellum with long, sparse, whitish hairs. Figs 92–95 View FIGURES 89–97 . Brazil (MG).................................................................................. A. distinguendus Hüdepohl, 1985 View in CoL

- Pronotum glabrous or with some sparse hairs; scutellum glabrous............................................... 4

4 (3). Prosternal process with a distinct tubercle directed to anterior margin of prosternal sulcus ( Fig. 130 View FIGURES 119–130 ); sides of prothorax and prosternum with dense, long, erect, whitish hairs. Figs 119–130 View FIGURES 119–130 . Brazil (MT, MS, GO, PA, Ceará to Rio Grande do Sul), Peru, Bolivia, Paraguay, Argentina View in CoL , Uruguay................................................ A. variegatus ( Perty, 1832) View in CoL

- Prosternal process without anterior tubercle; prothorax without dense, long hairs................................... 5

5 (4). Sides of prosternum ( Fig. 156 View FIGURES 152–163 ) with surface microsculptured and with dense wrinkles. Figs 152–156 View FIGURES 152–163 . Bolivia, Paraguay, Argentina View in CoL ............................................................... A. richteri ( Bruch, 1908) View in CoL status nov.

- Sides of prosternum smooth, at most with fine and sparse punctures.............................................. 6

6 (5). Pronotum swollen anteriorly, antemedian tubercle strongly developed (almost equal to postmedian). Figs 157–163 View FIGURES 152–163 . Brazil (MT, MS, GO, Maranhão to Bahia, SP View in CoL )...................................... A. fabricii ( Dupont, 1838) View in CoL status nov.

- Pronotum narrowed anteriorly, antemedian tubercle reduced.................................................... 7

7 (6). Elytra subparallel at least in anterior ¾, elytral apices unarmed. Figs 185–193 View FIGURES 185–193 . Venezuela, Brazil (PA), Trinidad and Tobago............................................................................... A. lacordairei ( Dupont, 1838) View in CoL

- Elytra narrowed gradually to apex; elytral apices with or without spines. Figs 215–226 View FIGURES 215–226 . Brazil ( Bahia View in CoL to Rio Grande do Sul), Bolivia, Paraguay, Argentina View in CoL ....................................................... A. rufipes ( Fabricius, 1787) View in CoL

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Cerambycidae

Loc

Andraegoidus Aurivillius, 1920

R, Juan Pablo Botero & Monné, Marcela L. 2012
2012
Loc

Andraegoidus

Monne, M. A. & Bezark, L. G. 2010: 150
Monne, M. A. & Giesbert, E. F. 1995: 142
Monne, M. A. 1994: 86
Hudepohl, K. E. 1985: 39
Aurivillius, C. 1920: 369
1920
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