Phidon chanco, Vera, 2019

Vera, Alejandro, 2019, Phidon chanco sp. nov. of cockroach from the coastal forest of central Chile (Insecta: Blattaria), Zootaxa 4712 (1), pp. 114-126 : 115-118

publication ID	https://doi.org/ 10.11646/zootaxa.4712.1.8
publication LSID	lsid:zoobank.org:pub:629AD6BA-84E5-445F-ABB0-E450D2292C4E
persistent identifier	https://treatment.plazi.org/id/F12BA144-FF9D-9C1B-DDB3-8A3BFEA1FE20
treatment provided by	Plazi
scientific name	Phidon chanco
status	sp. nov.

Treatment

Phidon chanco sp. nov.

( Figs. 1–11 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 View FIGURE 10 View FIGURE 11 )

Type material: Holotype: ♂ — Chile, Región del Maule, Cauquenes Province, Los Queules National Reserve, I-2016, col. R. Barahona , pitfall trap (ethanol 70%), MNNC . Paratypes: 1♀ — same date of holotype, may be in copula (ethanol 70%), MNNC . 5♀ and, 5♂ — Chile , Región del Maule , Cauquenes Province, Chanco 24-I to 16-II- 1999, pitfall trap (dry and pinned), MNNC .

Other material examined: 1 ♀ (dry and pinned), Chile, Región del Maule, Cauquenes Province, Pelluhue 18- IX to 20-IX-1985, col. F. Silva ; 6 ♂ and 6 ♀ (dry and pinned), 18 nymphs (ethanol 70%), Chanco 24-I to 16-II-1999 , pitfall trap; 1 ♂ (ethanol 70%) Los Ruiles National Reserve , I-2017, col. C. Cifuentes ; 1 nymph (ethanol 70%), Los Queules National Reserve , I-2016 , col. R. Barahona , pitfall trap ; 7 ♂, 3 ♀ (ethanol 70%), same locality, III-2017 ; 3 ♂ (ethanol 70%), same locality, IV-2017 .

Diagnosis: both sexes brachypterous; male tegmina not covering tergite X, both join but do not overlap in the dorsal midline of the body in resting position, wings reduced; female tegmina subtriangular, not covering metanotum, wings absent; male specialization in tergite VII as a reniform depression densely pubescent; hypandrium with sclerotised median triangle, prominent and strongly armed with denticles at the apex; genitalia with L 4V large, with helicoidal apex; female tergite X with emarginate apex.

Description of male: Measurements in Table 1 View TABLE 1 . General coloration ( Figs. 1 View FIGURE 1 A–C): body and legs pale brownish-yellow, almost translucent, eyes black, forehead brown, dorsal side of tibiae brown-based, cerci dorsally brown. Pronotum with bands and dots as in Figure 1C View FIGURE 1 , meso and metanotum with four dots, abdominal tergites and sternites with a dot on each side ( Figs. 1 View FIGURE 1 A–C). Tegmina translucent, with soft brown veins.

Head: subtriangular as long as wide ( Fig. 2A View FIGURE 2 ); distance between eyes on vertex 1.3 times the eye length; distance between antennal sockets about 2 times scape length; two small ocelli; flat clypeus; anteclypeus divided ( Fig. 2B View FIGURE 2 ); labrum with rounded margin. Mouthparts: Mandibles as in Figure 2C View FIGURE 2 ; left mandible with three incisives, incisives I+II fused at their bases, incisive III with auxiliary subapical tooth, premolar tooth prominent; right mandible with three triangular incisives. Labium ( Fig. 2D View FIGURE 2 ) with square submenton, short menton, prementon divided in two subtriangular sclerites, Ratios of relative lengths of palpomeres I–III equal to 2: 1.5: 3.5. Maxilla ( Fig. 2E View FIGURE 2 ) with triangular lacinia as long as wide basally, with two incisives, stipes 1.5 times as long as lacinia, lacinula with long base and three long teeth ( Fig. 2F View FIGURE 2 ), ratios of relative lengths of palpomeres III–V equal to 1: 1.5: 1.5.

Thorax: pronotum parabolic as in Figure 1 A – C View FIGURE 1 ; head barely surpasses the anterior margin. Legs as in Figure 3 View FIGURE 3 ; fore femur type B 3; claws simple and symmetrical, arolium large; all legs with pulvilli in tarsomeres I – IV. Tegmina: subtriangular ( Fig. 4 View FIGURE 4 B–D), they join in a straight line on the abdomen, their length does not exceed the tergite VIII ( Fig. 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 ); R with one proximal and three distal veins with one bifurcations ( Fig. 3 View FIGURE 3 ); CuP extending approximately half the length of the tegmina; cross veins weakly marked ( Fig. 4 View FIGURE 4 ); remigium with intercalary veins. Wings: reduced ( Fig. 4B View FIGURE 4 ), with anal region bent as fan; never overlap dorsally at the resting position.

Abdomen: tergites VI–IX with posterior margin medially emarginate ( Fig. 5A, 5C View FIGURE 5 ). Tergite VII specialization with a medial reniform hole, and long setae extending from a medial to an anterior tubercle, with its apex is curved and flat ( Fig. 5B View FIGURE 5 ), other setae are directed from the depression wall towards the center ( Fig. 5D View FIGURE 5 ). Anal plate with posterior margin triangular (apex emarginate) little sclerotised ( Fig. 6E View FIGURE 6 ). Paraprocts: as in Figure 5E View FIGURE 5 . Cerci: short, with 10–11 segments. VIII sternite asymmetrical apodemes ( Fig. 6C View FIGURE 6 ). Hypandrium: with asymmetrical apodemes, right apodeme acute and half the length of the left ( Fig. 6D View FIGURE 6 ); posterior margin with laminar styli subsymmetrical and hirsute ( Fig. 6G View FIGURE 6 ), this are articulated and cover the median triangle ( Fig. 6F View FIGURE 6 ); median triangle long, curved ( Fig. 6A View FIGURE 6 ) and dilated apex with numerous denticles ( Fig. 6B View FIGURE 6 ).

Male genitalia ( Figs. 7–8 View FIGURE 7 View FIGURE 8 ): phallomeres with sclerites as in Figure 7 View FIGURE 7 ; the conservative complex show L 3 in right position, r.plm reduced to two little sclerites and L2D in median position; the most complex structure is the medium lobe with a large L 4V and two labile areas with denticles and setae (c.b.f., c.b.m.a). L3 as in Figures 8I, 8J; L View FIGURE 8 2D View FIGURE 2 as in Figures 8 View FIGURE 8 E–H, distal end bend with lateral tubercle ( Fig. 8H View FIGURE 8 ), membranous apex with denticles ( Figure 8F, 8H View FIGURE 8 ); L 4V as in Figures 8 View FIGURE 8 A–D, 2/3 of the length of L2D, apex helicoidal dextrogyrus, armed with numerous denticles.

Description female: similar to male but wider. Measurements in Table 1 View TABLE 1 . General coloration: similar to male ( Figs. 1 View FIGURE 1 D–F), but more brownish; abdominal tergites and sternites brown. Brachypterous, tegmina as in Figure 4A View FIGURE 4 , subtriangular, apex reaching at most half of the metanotum ( Fig. 1D, 1F View FIGURE 1 ). Wing absent.

Abdomen: tergite X with apex narrow and emarginate ( Fig. 9A View FIGURE 9 ). Posterior margin of genital plate weakly emarginate medially ( Fig. 9B View FIGURE 9 ). Paraproct spatulated with large membranous medial region in ventral view ( Fig. 10 View FIGURE 10 ).

Genitalia: vestibulum with dorsal complex sclerites ( Fig. 10 View FIGURE 10 ), with fused V-shaped intercalary sclerite (is); pt symmetrical; Pl like a prominent rounded tubercle; acute valves; bsvd poorly sclerotised in the middle. Ventral complex sclerites as in Figure 11 View FIGURE 11 , bsvv with large posterior arms, fused at the base forming a sclerotised fork; Ls like a sclerotised fork posterior arms have a groove forming a sheet covered with setae next to the gonopore; anterior extreme of Ls sclerotised with shovel form. Anterior ventral complex forming a bursa copulatrix (bc) between anterior sclerites from Ls and bsvv. Inside the bc a membranous lobe independently carries the two openings of the spermathecae ( Fig. 11C View FIGURE 11 ). The spermathecae are two small spherical and weak bags, next to the anterior bsvv sclerite ( Fig. 11B View FIGURE 11 ).

Etymology: a name in apposition alluding to Chanco, the Chilean locality where most of the studied specimens were collected.