Metaleptobasis quadricornis ( Selys, 1877 )

Ellenrieder, Natalia Von, 2013, <p> <strong> A revision of <em> Metaleptobasis </ em> Calvert (Odonata: Coenagrionidae) with seven synonymies and the description of eighteen new species from South America </ strong> </ p>, Zootaxa 3738 (1), pp. 1-155: 66-68

publication ID

http://dx.doi.org/10.11646/zootaxa.3738.1.1

publication LSID

lsid:zoobank.org:pub:77D1A6F6-C320-442B-AF31-83324E5EAF3B

persistent identifier

http://treatment.plazi.org/id/03E187ED-6677-FFFB-D7A8-FF6EE672FC79

treatment provided by

Felipe

scientific name

Metaleptobasis quadricornis ( Selys, 1877 )
status

 

Metaleptobasis quadricornis ( Selys, 1877)  

Figs. 1y View FIGURE 1 ; 2y View FIGURE 2 ; 3y View FIGURE 3 ; 4y View FIGURE 4 ; 5y View FIGURE 5 ; 8y View FIGURE 8 ; 9x View FIGURE 9 ; 10y View FIGURE 10 ; 11y View FIGURE 11 ; 12y View FIGURE 12 ; 14b

Leptobasis quadricornis Selys, 1877: 104–105   [10–11 reprint] (description ♀).

Metaleptobasis quadricornis: Calvert (1907: 386   ; suggestion of possible inclusion in genus);— Williamson (1915: 608; mention);— Calvert (1948: 61; mention);— Cumming (1954: 24, 30; mention);— Lencioni (2006: 166, fig. 104 A; mention, illustration mesanepisternal horns);— Heckman (2008: 397, fig. 3.1.457; in key, reproduction of illustration from Lencioni 2006);—von Ellenrieder & Garrison (2007: 25, figs. 11f–h; illustration of female posterior lobe of pronotum, mesanepisternal horns and pretarsal claw);— Garrison & von Ellenrieder (2009: 49; mention);— Garrison et al. (2010: 284, figs. 1826, 1833; mention, reproduction of illustrations from von Ellenrieder & Garrison 2007);—von Ellenrieder (2011: 57–58, 62, 73; mention).

Metaleptobasis brysonima   nec Williamson, 1915 —Rácenis (1956: 12–13, 18–19, fig. 2d mislabeled in legends as 2c; description of ♀ based on misidentified ♂ from Venezuela, inclusion in key for species from Venezuela);— Michalski (1988: 45; in part, inclusion of female in key);— De Marmels (1989: 31; mention);— De Marmels (1992a: 337 View Cited Treatment ; mention);— De Marmels (1992b: 63 View Cited Treatment ; mention).— Misidentifications.

Metaleptobasis weibezahni   nec Rácenis, 1956—Belle (2002: 3; mention);— Garrison & von Ellenrieder (2009: 49; mention).— Misidentification.

Types. Holotype ♀ *: BRAZIL, Pará State , Pará {1°27'S, 48°29'W, 2 m}, Bates   leg. [ IRSNB]. GoogleMaps  

Specimens examined. Total: 53 ♂, 64 ♀: 1 ♀ holotype; SURINAME   : 1 ♀, No locality, Staudinger & Bang- Haas vendors [ BMNH]; Brokopondo Dis   .: 1 ♀, Kabelstation , forest {4°55'N, 55°8'W, 41 m}, 23 ix 1938, D.C. Geijskes leg. [ RMNH] GoogleMaps   ; 1 ♀, same but Suriname River , 4 i 1960, J. Belle leg. [ RMNH]   ; 2 ♂, Stoelmans Island , forest by the river {5°4'N, 54°58'W, 10 m}, 18 viii 1953, D.C. Geijskes leg. [ RMNH]; Para Dis GoogleMaps   .: 1 ♂, Sapenda to Copie {5°31'N, 54°44'W}, in forest 14 vii 1953, D.C. Geijskes [ RMNH] GoogleMaps   ; 1 ♀, Zanderij {5°27'N, 55°12'W, 23 m}, 1956, J. Belle leg. [ TWD] GoogleMaps   ; 1 ♂, 1 ♀, same but Troelinde Creek , 1 viii 1959 [ FSCA]   ; 1 ♀, same but [ RWG]   ; 1 ♂, same but 8 viii 1959 [ RMNH]   ; 1 ♂, same but 19 viii 1962 [ TWD]   ; 1 ♂, Zanderij I, forest, 2 ix 1942, D.C. Geijskes leg. [ RMNH]   ; 1 ♂, same but Pontjibrug , 10 i 1957, J. Belle leg. [ RMNH]   ; 1 ♀, same but 12 i 1957 [ RMNH]   ; 1 ♂, same but 23 vi 1957 [ RMNH]   ; 1 ♀, Mata , in forest {5°27'N, 55°19'W, 20 m}, 8 i 1963, S. Ligorie leg.[ RMNH] GoogleMaps   ; 1 ♀, same but Boven Coropino , gallery forest {5°32'N, 55°10'W}, 28 iv 1957 [ RMNH] GoogleMaps   ; 1 ♂, 3 ♀, same but 29 vii 1958 [ RMNH]   ; 1 ♀, same but 4 xi 1958 [ RMNH]   ; 1 ♀, same but trail near Hannover , small creek in savannah, 13 xi 1949, D.C. Geijskes leg. [ RMNH]   ; 1 ♀, Republiek {5°30'N, 55°12'W, 15 m}, 10 x 1946, D.D. Geijskes leg. [ RMNH] GoogleMaps   ; 1 ♂, same but forest, 1 xi 1963 [ RMNH]; 2, same but 19 x 1963 [ RMNH]   ; 2 ♂, same but Coropina Creek , forest near creek {5°32'N, 55°10'W, 10 m}, 9 iii 1947 [ RMNH]; Commewijne Dis GoogleMaps   .: 1 ♀, Copie {5°32'N, 54°48'W, 30 m}, 26 xi 1979, C.F. Mees leg. [ RMNH] GoogleMaps   ; 1 ♀, near Potribo, Macreabo Creek {5°45'N, 54°46'W, 10 m}, 16 x 1954, Radin leg. [ RMNH]; Suriname Dis GoogleMaps   .: 1 ♂, Lelydorp , forest km 25 {5°42'N, 55°14'W, 8 m}, 25 x 1938, D.C. Geijskes leg. [ RMNH] GoogleMaps   ; 1 ♀, Rijsdijkweg , 12 i 1957, J. Belle leg. [ RMNH]; Marowijne Dis   .: 1 ♂, Donderbari, Baptist Creek {5°14'N, 55°14'W, 50m}, 15 xii 1945, D.C. Geijskes leg. [ RMNH] GoogleMaps   ; 1 ♂, Mooi Wanna Creek, Weijneweg {5°35'N, 54°15'W}, 4 i 1964, J. Belle leg. [ RWG] GoogleMaps   ; 1 ♂, 2 ♀, Wane Creek N, Camp 1, forest {5°38'N, 54°2'W, 20 m}, 28 ix 1948, D.C. Geijskes leg. [ RMNH] GoogleMaps   ; 1 ♂, same but near km 8, 30 ix 1948 [ RMNH]   ; 1 ♂, Moengo, Cottio River {5°37'N, 54°24'W, 25 m}, 17 v 1927, E.B. Williamson leg. [ FSCA] GoogleMaps   ; 1 ♀, same but boermanhill in forest, 18 ix 1961, D.C. Geijskes [ RMNH]   ; 1 ♂, 1 ♀, Moengotapoe , trail km 0.5 {5°34'N, 54°14'W, 33 m}, 20 ix 1948, D.C. Geijskes [ RMNH] GoogleMaps   ; 2 ♂, same but 21 ix 1948 [ RMNH]   ; 1 ♀, same but 22 ix 1948 [ RMNH]   ; 1 ♂, 1 ♀, same but trail km 1.0–1.5 [ RMNH]   ; 1 ♀, same but trail km 3–4 [ RMNH]   ; 1 ♂, same but 23 ix 1948 [ RMNH]   ; 1 ♀, same but trail km 4.6, 24 ix 1948 [ RMNH]   ; 2 ♀, same but Djai Creek , trail 1 km 8.6, forest, 10 x 1948 [ RMNH]   ; 4 ♀, same but 3rd camp, trail km 15–15.7, forest on sand ridge parallel to the coast, 13 x 1948 [ RMNH]   ; 1 ♀, same but km 14.9, forest on sand ridge parallel to the coast, 14 x 1948 [ RMNH]   ; 1 ♂, 4 ♀, same but trail km 14.3–15.5 [ RMNH]   ; 2 ♀, same but N trail km 15.7 [ RMNH]   ; 5 ♀, same but trail km 14.6–14.9, 18 x 1948 [ RMNH]   ; 1 ♂ 1 ♀, same but trail km 15.5 [ RMNH]   ; 2 ♀, same but 19 x 1948 [ RMNH]   ; 2 ♂, trail km 14.2–14.7, forest on sand ridge parallel to the coast, 14 x 1948 [ RMNH]   ; 2 ♂, same but trail km 14.6–14.9, 18 x 1948 [ RMNH]; Sipaliwini Dis   .: 1 ♀, Werehpai , forest trail (2°21'46''N, 56°41'53''W, 258 m), 3 ix 2010, NVE [ NVE] GoogleMaps   ; 1 ♂, Tafelberg Creek , trail km 20 {3°47'N, 56°11'W, 170 m}, 1 xi 1943, D.C. Geijskes [ RMNH] GoogleMaps   ; 1 ♂, 1 ♀ (in copula), same but 26 iii 1958 [ RMNH]   ; 1 ♂, Nassaugebergte , trail km 0.7, forest {4°48'N, 54°29'W}, 10 ii 1949, D.C. Geijskes [ RMNH] GoogleMaps   ; 1 ♀, same but trail km 6, 14 ii 1949 [ RMNH]   ; 1 ♂, 1 ♀, same but km 0.7, 15 ii 1949 [ RMNH]   ; 1 ♂, 1 ♀, same but trail km 1 [ RMNH]   ; 1 ♂, 1 ♀, same but trail km 2, forest, 16 ii 1949 [ RMNH]   ; 1 ♂, same but km 0.7, forest, 17 ii 1949 [ RMNH]   ; 1 ♂, same but trail km 1.4, forest [ RMNH]   ; 2 ♂, same but trail km 1.2 forest creek, 18 ii 1949 [ RMNH]   ; 1 ♀, same but trail km 0.7 [ RMNH]   ; 2 ♂, same but trail km 1.3 creek, 22 ii 1949 [ RMNH]   ; 1 ♂, same but trail km 1.2 forest creek [ RMNH]   ; 1 ♂, same but trail km 1.4, forest [ RMNH]   ; 2 ♂, same but trail km 11.5 [ RMNH]   ; 3 ♂, same but trail km 1.4–1.5, forest [ RMNH]   ; 1 ♂, 1 ♀ (in copula), same but trail km 1.2, forest creek [ RMNH]   ; 1 ♂, same but trail km 6, 24 ii 1949 [ RMNH]   ; 1 ♀, same but trail km 6, 1 iii 1949 [ RMNH]; FRENCH GUIANA: Saint Laurent-Du-Maroni Dep   .: 1 ♂, 3 ♀, Pied Saut, Oyapok river {5°21'N, 53°41'W, 19 m}, xi 1917, S.M. Klages leg. [ FSCA] GoogleMaps   ; 1 ♀, Mana river {5°40'N, 53°47'W, 1 m}, v 1917 [ FSCA] GoogleMaps   ; 1 ♂, 1 ♀, Tamanoir , v 1917 [ FSCA]; BRAZIL: Pará State   : 1 ♀, Benevides {1°22'S, 48°15'W, 21 m}, x 1918, S.M. Klages leg. [ FSCA] GoogleMaps   .

Characterization. Head. Labrum mostly pale; black on dorsum of head extensive; postocular lobes markedly angled ( Fig. 1y View FIGURE 1 ). Thorax. Pronotum anterior lobe ( Figs. 4y View FIGURE 4 ; 5y View FIGURE 5 ) smooth; anterior and middle lobes of pronotum separated dorso-laterally by a groove; anterior area of propleuron with a prominent rounded tubercle (t.), a short longitudinal crest (lo.) and a c-shaped crest (c.); middle lobe of pronotum smooth; anterior margin of middle lobe of pronotum forming a prominent crest (cr.) followed by a transverse dorsal depression; pronotum posterior lobe entire to slightly trilobed in male, trilobed with medial lobe with short central point and lateral lobes rounded and longer than medial lobe in female; lateral margins of pronotum posterior lobe free and rounded; bases of mesanepisternal horns joined by a low ridge to separated, horns thin to medium in width, parallel sided to slightly divergent to convergent, directed antero-dorsally at 60°–85° with dorsum in lateral view, with tip bluntly pointed, well developed, equal to two times mesostigmal plate width to slightly longer in male, two to three times mesostigmal plate width in not dimorphic female, and 0.50 of mesostigmal plate width in dimorphic female; mid-dorsal dark stripe wide, 0.50 of mesanepisterna, wider than mesostigmal sinus, narrowing between horn bases, remainder parallel sided ( Fig. 3y View FIGURE 3 ); Pt sub-rectangular, with anterior and posterior sides longer than distal side. Abdomen. Male genital lobe short, less than 0.50 of anterior hamule height, digit-like and small, with at most only tip surpassing ventral margin of genital fossa in lateral view; curvature of basal segment of genital ligula marked by a slight concave depression; genital ligula distal segment pear-shaped, apex with a shallow u- or vshaped incision, lacking an ectal fold ( Fig. 8y View FIGURE 8 ); posterior margin of female S8 sternum smooth, lacking any denticles, spines, or processes; distal end of ovipositor reaching apex of paraproct to apex of cercus ( Fig. 9x View FIGURE 9 ); medial portion of male S10 postero-dorsal margin ( Figs. 10y View FIGURE 10 ; 11y View FIGURE 11 ; 12y View FIGURE 12 ) projected posteriorly, with a small u-shaped incision and lacking a dorsal prominence; male cercus in dorsal view ( Fig. 10y View FIGURE 10 ) about straight, narrowing to tip, which forms a hook directed ventrally; ratio of male cercus length to S10 maximum length in lateral view 0.88–1.0; ratio of male cercus length to paraproct length in lateral view 0.51–0.55; male paraproct in lateral view ( Fig. 12y View FIGURE 12 ) with a marked ventral kink at about mid-length, of about uniform width along distal half; paraproct medial surface with a marked longitudinal crest on inner surface at apex, ending on a single apical tooth directed medially.

Dimensions. Males (n 10): Hw 20.9 ± 0.4 [20.3–21.8]; abdomen 35 ± 1.1 [33.6–37]; total length 41.9 ± 1.2 [40.2–44.1]. Females (n 10): Hw 22.9 ± 0.7 [22–24.1]; abdomen 35.5 ± 1.5 [33.2–37.5]; total length 42.6 ± 1.6 [40–44.7].

Diagnosis. Among the species with male posterior hamule small and digit-like, posterior margin of female S8 sternum lacking any denticles, spines, or processes, black on dorsum of head extensive, and labrum mostly pale, M. quadricornis   shares only with M. foreli   and M. turbinata   the antero-dorsal margin of middle lobe of pronotum forming a distinct crest. It differs from M. turbinata   by the crest being entire ( Fig. 5y View FIGURE 5 ; bilobate in M. turbinata   , Fig. 5 View FIGURE 5 ae), distal segment of genital ligula lacking flagella ( Fig. 8y View FIGURE 8 ; with long coiled paired flagella in M. turbinata   , Fig. 8 View FIGURE 8 ae), and male cercus distinctly shorter than paraproct ( Fig. 12y View FIGURE 12 ; slightly longer than paraproct in M. turbinata   , Fig. 12 View FIGURE 12 ae). It differs from M. foreli   by pronotum laterally smooth ( Fig. 4y View FIGURE 4 ; with a prominent rounded tubercle and a longitudinal crest on middle lobe in M. foreli   , Fig. 4h View FIGURE 4 ), posterior lobe of female pronotum deeply trilobed with lateral lobes rounded and longer than medial lobe ( Fig. 5y View FIGURE 5 ; slightly trilobed with lateral lobes shorter than medial lobe in M. foreli   , Fig. 5h View FIGURE 5 ), distal segment of genital ligula lacking a sclerotized pointed tubercle at base and lacking an ectal fold ( Fig. 8y View FIGURE 8 ; with a sclerotized pointed tubercle (p.t.) at base and a wide ectal fold (e.f.) in M. foreli   , Fig. 8h View FIGURE 8 ), male cercus sub-cylindrical, gradually narrowing distally, with tip curved ventrally forming a hook and male paraproct curved ventrally at an angle, with tip pointed in lateral view ( Fig. 12y View FIGURE 12 ; cercus basal half globose, distal half sub-cylindrical, with only extreme tip pointed ventrally, and paraproct curved ventrally gradually, with distal end rounded in lateral view in M. foreli   , Figs. 12h View FIGURE 12 ).

All females of M. quadricornis   are dimorphic in shape of pronotal hind lobe, and can share long horns with males (about 67%) or have short horns (about 33%).

Remarks. Selys (1877) described the female pronotum of M. quadricornis   as follows (translated from the French): ‘the posterior margin almost straight and each of its sides with a flattened horn, upright and leaning towards the anterior thorax’, which probably reflects Selys name choice for this species. Unfortunately, his description lacked illustrations, and his ‘flattened horns’ refer actually to the lateral lobes of the pronotum posterior lobe ( Figs. 4y View FIGURE 4 iii–vii). This led all later workers who relied solely on the original description, to expect four horns on the thorax ( Cumming 1954; Rácenis 1955; Heckman 2008), and contributed to the idea this species was represented only by the holotype until very recently.

Based on similarity of a male of M. quadricornis   collected in Venezuela to the description of the holotype of M. brysonima, Rácenis (1955)   described the females collected with the male as M. brysonima   . As male cerci and color pattern in M. brysonima   and M. quadricornis   are very similar, and he did not examine type material and relied on original descriptions for his identifications, unfortunately he misassociated these two names. After examining the holotype female of M. quadricornis   and the holotype male of M. brysonima   , as well as pairs of males and females of both species, I conclude that the species Rácenis (1955) identified as M. brysonima   and for which he described and illustrated the female (figs. 2d, mislabeled as 2c as stated by De Marmels 1989: 32) is in fact M. quadricornis   . De Marmels (1989, 1992a, b) followed Rácenis (1955) species concepts and treated M. quadricornis   as M. brysonima   . Belle (2002), probably based on the mislabeled figure of M. brysonima   (= M. quadricornis   ) as M. weibezahni   in Rácenis (1955: figs. 2d mislabeled as 2c), recorded M. weibezahni   from Surinam based on misidentified specimens of M. quadricornis   , which I confirmed through specimens with his identification labels in FSCA, RWG, TWD, and RMNH.

Habitat. Forest near rivers and creeks.

Distribution. Venezuela, Surinam, French Guiana, and N Brazil ( Fig. 14b).

IRSNB

Institut Royal des Sciences Naturelles de Belgique

RMNH

National Museum of Natural History, Naturalis

FSCA

Florida State Collection of Arthropods, The Museum of Entomology

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Odonata

Family

Coenagrionidae

Genus

Metaleptobasis

Loc

Metaleptobasis quadricornis ( Selys, 1877 )

Ellenrieder, Natalia Von 2013
2013
Loc

Metaleptobasis weibezahni

Garrison, R. W. & von Ellenrieder, N. 2009: 49
2009
Loc

Metaleptobasis brysonima

De Marmels, J. 1992: 337
De Marmels, J. 1992: 63
De Marmels, J. 1989: 31
Michalski, J. 1988: 45
1988
Loc

Metaleptobasis quadricornis: Calvert (1907: 386

Garrison, R. W. & von Ellenrieder, N. & Louton, J. A. 2010: 284
Garrison, R. W. & von Ellenrieder, N. 2009: 49
Heckman, C. W. 2008: 397
Lencioni, F. A. A. 2006: 166
Cumming, R. B. 1954: 24
Calvert, P. P. 1948: 61
Williamson, E. B. 1915: 608
Calvert, P. P. 1907: 386
1907
Loc

Leptobasis quadricornis

Selys, E. 1877: 105
1877