The genus Phalaecus Stål, 1862 in French Guiana, description of P. carmini n. sp., and the female of P. lineatus Grazia, 1983 from Mitaraka (Hemiptera: Pentatomidae) Author Lupoli, Roland text Zoosystema 2019 2019-02-05 41 3 21 28 journal article 10.5252/zoosystema2019v41a3 836ea572-b61e-446b-b9da-d799553ffc47 1638-9387 3718476 urn:lsid:zoobank.org:pub:BF61A0DE-B25D-4362-8A28-5B4854BC67C8 Phalaecus carmini n. sp. ( Figs 1E, F ; 2P, Q ) urn:lsid:zoobank.org:act: 95C81E81-3422-4316-834B-35CC35FF088D TYPE MATERIAL. — Holotype . ♂ , French Guiana . Guyane [Sinnamary], Route du barrage de Petit Saut PK 21, PL [piège lumineux = UV-MV light trap], 29.IV.2002 , Lupoli leg., MNHN . Paratype . ♂ same data as Holotype, coll. RL . ♀ , unknown. DISTRIBUTION. — French Guiana : Sinnamary. ETYMOLOGY. — Name based in the carmine red colored body, and the rufous femora, tibiae and tarsus. DIAGNOSIS. — Phalaecus carmini n. sp. can be distinguished from the other species of the genus by the dorsal carmine red background ( Fig. 1E ). Phalaecus lineatus has a dorsal pale yellow ocher color and antennae without contrasting black spots ( Fig. 1C ). Phalaecus nigromaculatus has a general red or orange dorsal color and contrasting dark areas, and has entirely black antennomeres I and II ( Fig. 1D ). Phalaecus pustulatus is larger, has a more elongated body shape and antennomeres I not dark ( Fig. 1A ). Phalaecus ruckesi is more similar to P. carmini n. sp. , but the background color is brown and light spots occupy a larger area on corium in P. ruckesi ( Fig. 1B ). Also the longitudinal stripe on the head is proportionally broader in P. carmini n. sp. ( Fig. 1E ) than in the other species. The shape of the ventral rim of the pygophore and shape of the parameres ( Fig. 2Q ) easily separate P. carmini n. sp. from the other species. Phalaecus carmini n. sp. is the only species in which ventral rim is not bifid and whose parameres are quite large, occupying a large part of the genital cup on each side, and not boot or hook shaped but a very specific shape as shown in Fig. 2Q. DESCRIPTION OF MALE Measurements (mm) Total length: 12.5-12.8; pronotum width (at humeral angles): 7.6-7.8; abdomen width: 7.6-7.8; head length: 1.6-1.7; head width across the eyes: 2.2-2.3; pronotum length: 2.7- 2.8; Antennomeres: I: 1.0-1.1, II: 1.5-1.6, III: 2.2-2.3, IV (missing in paratype ): 2.80, V (missing in paratype ): 2.80. Coloration Dorsal surface carmine red with light orange spots ( Fig. 1E ). Carmine red surface associated with concolorous deep and dense punctures uniformly distributed on pronotum, scutellum and corium; light orange spots impunctate. Ventral surface yellow and impunctate, except few concolorous punctures on prosternum ( Fig. 1F ). Small black macules around each abdominal spiracles and at the base of each thoracic coxae. Antennomeres I carmine red, II yellow but basally and apically black, III and IV yellow with apical two third black, V yellow with apical half black. Legs yellow with distal part of femora, proximal and distal apices of tibiae and tarsi reddish. Head Clypeus shorter than the mandibular plates. Central longitudinal carmine red line surrounded by two light orange spots. This line thicker than in all other species. Ocelli bright red. Thorax Anterolateral margins of the pronotum straight. Pronotum carmine red with sixteen large light orange impunctate spots aligned in three transversal rows (4-6-6). Abdomen Scutellum carmine red with two large light orange impunctate spots on each basal angle, one large at the apex, and few other smaller and irregular spots in between. Each corium carmine red with three large yellow impunctate macules (and about ten other smaller ones), one in the middle, one at the apex and one at the anterolateral margin of the exocorium. The area covered by all light orange impunctate spots smaller than half of the corium surface. Connexivum impunctate alternately carmine red and light orange ( Fig. 1E ). Male genitalia Pygophore, parameres and proctiger light orange and impunctate. In dorsal view, ventral rim almost straight, from the posterolateral angles of pygophore to the central U-shaped excavation ( Fig. 2P ). This large U-shaped orthogonal excavation as wide as the quarter of the width of the pygophore. Dorsal rim slightly sinuated, leaving base of parameres exposed. Proctiger trapezoidal with short setae ( Fig. 2P ). Parameres quite big, not boot or hook-shaped and occupying a large part of the genital cup on each side; parameres flat and triangular with an outer laterally directed triangular lobe and an inner large and laterally curved lobe ( Fig. 2Q ). REMARK Grazia et al. (2015) published a dorsal picture of a Phalaecus sp. female specimen from Peru (Yuyapichis, 21.IX.2004 ). Its dorsal surface is carmine red with light orange spots like in P. carmini n. sp. , but the distribution of these spots on the corium surface is more similar to P. ruckesi . Also, antennomeres I are brownish, black apical part on antennomeres III is less than half of its length, the head central longitudinal stripe is thin and legs are orange and concolorous like in P. ruckesi . This specimen should be compared to the P. ruckesi females holotype and paratype for correct identification. According to the description of Grazia ( 1983 ) , Phalaecus paraense Grazia, 1983 appears to be close to P. ruckesi but is distinguished by its antennomeres II, which are entirely reddish ocher, and male genitalia ( Fig. 2O ). Only the male holotype of this species is known.