Euspilotus (Platysaprinus) ferreri, Lackner & Arriagada, 2020

Lackner, Tomáš & Arriagada, Gerardo, 2020, Revision of Euspilotus, subgenus Platysaprinus, with description of two new species (Coleoptera: Histeridae), Acta Entomologica Musei Nationalis Pragae 60 (1), pp. 303-317 : 312-314

Euspilotus (Platysaprinus) ferreri sp. nov.

( Figs 34–44 , 56 )

Type locality. Brazil: Minas Gerais, Parque National da Serra do Cipó. Type material examined. HoLoTYP E:, glued onto the tip of the mounting point, genitalia extracted and disarticulated, glued onto a separate mounting card under the specimen, ‘ Brazil Minas Gerais | P. N. Serra do Cipó | Campo Rupestre | 15 Tctubre 2004 | Leg. Gustavo Schiffer [printed] || Euspilotus | ( Platysaprinus ) | ferreri | nov. sp. | Det. G. Arriagada, 2018 [printed] || Euspilotus (Platysaprinus) | ferreri sp. nov. | HTLTToPE 2019 | des. T. Lackner & G. | Arriagada [red label, written]’ ( CEMT). PARATYP Es: ♀, ‘ BRASIL: Minas Gerais. | Mata do Paraíso. 20º47’ | S; 42º51’W. F.Z.WII- | 1998 | Vaz de Mello [printed] || Euspilotus | ( Platysaprinus ) | ferreri | nov. sp. | Det. G. Arriagada, 2018 [printed] || Euspilotus (Platysaprinus) | ferreri sp. nov. | PARAToPE | des.T. Lackner & G. | Arriagada 2019 [red label, written]’ ( CVMD);, ‘ BRASIL Minas Gerais | Viçosa | Noviembre 1999 | Leg. A. Bello [printed] || Euspilotus | ( Platysaprinus ) | ferreri | nov. sp. | Det. G. Arriagada, 2018 [printed] || Euspilotus (Platysaprinus) | ferreri sp. nov. | PARAToPE | des.T. Lackner & G. | Arriagada 2019 [red label, written]’ ( CTLA); ♀, ‘ BRASIL Río de Janeiro | Nova Friburgo | Marzo 2012 | Leg. E. Grossi [printed] || Euspilotus | ( Platysaprinus ) | ferreri | nov. sp. | Det. G. Arriagada, 2018 [printed] || Euspilotus (Platysaprinus) | ferreri sp. nov. | PARAToPE | des. T. Lackner & G. | Arriagada 2019 [red label, written]’ ( CND);, ‘ Brazil Mato Grosso | Lavras | Enero 2003 | leg. C. Cambraia [printed] || Euspilotus | ( Platysaprinus ) | ferreri | nov. sp. | Det. G. Arriagada, 2018 [printed] || Euspilotus (Platysaprinus) | ferreri sp. nov. | PARAToPE | des. T. Lackner & G. | Arriagada 2019 [red label, written]’ ( MNHNC).

Description. Body ( Fig. 34 ). PEL: 3.50–3.60 mm; APW: 1.40–1.50 mm; PPW: 2.50–2.75 mm; EW: 2.90–3.10 mm; EL: 2.10–2.20 mm; rectangular oval, dark brown; body appendages castaneous, antennal club lighter.

Head. Tccipital stria well impressed, supra-orbital stria indistinct, frontal stria present in antero-lateral angles, for short distance prolonged onto epistoma. Frons with slight lateral and posterior depressions, wholly punctate, punctures separated by their own to twice their diameter; epistoma depressed, punctate. Eyes large, protruding. Labrum and mandibles similar to preceding species; other mouthparts not examined. Antennal scape dilated and thickened, with single long seta on anterior surface and single shorter seta dorsally. Antennal club circular, depressed dorso-ventrally, tomentose, without visible external sensory structures.

Pronotum ( Fig. 34 ). Anterior pronotal angles obtuse, marginal pronotal stria complete, pronotum wholly punctate, punctures separated by 2–3 times their diameter. Pronotal hypomeron asetose, scutellum small, triangular.

Elytra ( Fig. 34 ). Elytral epipleuron weakly punctuate, marginal epipleural stria very thin; marginal elytral stria weakly cariniform, complete, continued along elytral apex for short distance; apical elytral stria otherwise absent. A dense row of prominent punctures present along marginal elytral stria. Inner subhumeral stria present as long median fragment, deeply impressed, with tiny punctures. Humeral elytral stria weakly impressed on basal elytral third; dorsal elytral striae well impressed, punctate, first longest, slightly surpassing elytral half apically, striae 2–4 slightly shorter, stopping short of half of elytral length apically, basal ends of all striae curved mediad. Fourth dorsal elytral stria curved inwardly and shortly continued as apical fragment of sutural elytral stria; sutural elytra stria otherwise present only as short and weak fragment on apical elytral half. Elytra wholly punctate, punctures on basal elytral half (chiefly among elytral striae) almost microscopic; on apical elytral half much denser and prominent, separated by once to twice their diameter, extreme elytral apex glabrous.

Propygidium and pygidium densely punctate, punctation of pygidium becoming finer and sparser apically; pygidium slightly depressed laterally.

Prosternum ( Fig. 35 ). Prosternal process strongly compressed, keel-like, with fine scattered punctures; marginal prosternal stria present, terminating in large prosternal foveae; carinal prosternal striae divergent apically, terminating in prosternal foveae; lateral prosternal striae carinate, apically joining carinal striae at two-thirds point.

Mesoventrite ( Fig. 35 ) approximately four times as wide as long, with scattered microscopic punctuation; marginal mesoventral stria complete, slightly carinate; meso-metaventral stria complete, undulate.

Metaventrite ( Fig. 35 ). Disc of metaventrite with sparse microscopic punctation, along apical margin double row of larger punctures present; lateral metaventral stria almost complete, slightly carinate, stopping short of metacoxa. Lateral disc of metaventrite with three rows of large deep punctures.

Abdomen. First visible abdominal ventrite slightly depressed on basal third, almost completely striate laterally, disc along margins with larger punctures, medially only with sparse microscopic punctures.

Legs. Protibia dilated, on outer margin with 4–5 low teeth, each topped by short amber denticle, outer row of setae regular, protarsal groove shallow, protibial stria complete and carinate, median row of setae very short. Protibial spur short, growing out from apical protibial margin; outer part of posterior surface of protibia rugulose-lacunose; median part of posterior surface glabrous; posterior protibial stria complete, with microscopic setae; setae of inner protibial margin double, dense and regular. Mesotibia slightly dilated, on outer margin with six prominent denticles, outer row of setae sparse; median row of setae microscopic and scattered. Posterior mesotibial stria complete; protibial spur conspicuous. Anterior mesotibial stria complete; a single inner row of setae. Metatibia slightly dilated, on outer margin with seven denticles progressively increasing in length apically; metatibia otherwise similar to mesotibia. Male genitalia. Sternite VIII ( Figs 36–37 ) strongly sclerotized, separated medially, extreme apices with tuft of microscopic setae. Tergite VIII ( Fig. 37 ) apically almost straight, not arcuate as in preceding species; sternite VIII and tergite VIII not fused laterally ( Fig. 38 ). Tergite W ( Fig. 39 ) apically inwardly arcuate; tergite IW ( Fig. 39 ) somewhat more parallel-sided than in preceding species. Spiculum gastrale ( Figs 41–42 ) dilated on both ends, its apex (I ‘head’) strongly sclerotized. Aedeagus ( Figs 43–44 ) with slightly larger phallobase than with preceding species; ratio phallobase: parameres 1.0: 2.5; otherwise similar to preceding species, strongly curved from lateral view, apex not as pointed as with preceding species.

Differential diagnosis. Differs from E. (P.) latimanus in the absence of costate first dorsal elytral stria as well as by the non-costate lateral pygidial margins. Differs from E. (P.) myrmecophilus in the impunctate basal third to half of the elytra, and from E. (P.) vazdemelloi sp. nov. in the broadly-oval body and basally non-abbreviated dorsal elytral striae 3–4 (abbreviated in case of E. (P.) vazdemelloi sp. nov.)).

Biology. Unknown.

Etymology. Patronymic, this new species is named after the Spanish entomologist Juan de Ferrer Andreu (1924– 2008), a specialist on Histeridae .

Distribution. Known only from Brazil (Minas Gerais, Mato Grosso and Rio de Janeiro).

Figures

Figs 34–35. Euspilotus (Platysaprinus) ferreri sp. nov. 34 – habitus, dorsal view; 35 – prosternum, meso- and metaventrite.

Figs 36–44. Male genitalia of Euspilotus (Platysaprinus) ferreri sp. nov. 36 – VIII sternite and tergite, ventral view; 37 – ditto, dorsal view; 38 – ditto, lateral view; 39 – IW and W tergites, dorsal view; 40 – ditto, lateral view; 41 – IW sternite (spiculum gastrale), ventral view; 42 – ditto, lateral view; 43 – aedeagus, dorsal view; 44 – ditto, lateral view.

Fig. 56. Distributional map of the subgenus Platysaprinus Bickhardt, 1916 of the genus Euspilotus, 1907.