Cercyon taino, Arriaga-Varela, Emmanuel, Seidel, Matthias, Deler-Hernandez, Albert, Viktor Senderov, & Fikacek, Martin, 2017

Arriaga-Varela, Emmanuel, Seidel, Matthias, Deler-Hernandez, Albert, Viktor Senderov, & Fikacek, Martin, 2017, A review of the Cercyon Leach (Coleoptera, Hydrophilidae, Sphaeridiinae) of the Greater Antilles, ZooKeys 681, pp. 39-93 : 48

Cercyon taino sp. n. Figures 1 g–i, 5 e–h, 9 f–i, 15b

DNA barcodes.

GANTC007-17 to GANTC009-17

BIN ID.

BOLD:ADF5574

Figures in Flickr.

www.flickr.com/photos/142655814@N07/albums/72157671656199632

Type locality.

Dominican Republic, Samaná Province, dam 2.5 km N of Samaná, 58 m a.s.l., 19°13.70'N, 69°19.85'W.

Type material.

Holotype (male): "DOMINICAN REP.: Samaná, dam 2.5 km N of Samaná, 19°13.70'N, 69°19.85'W; 58 m, 5.ix.2014, Deler, Fikáček, Gimmel DR35 // in older cow excrements dampered by recent rains at the grassy bank of a reservoir" (NMPC) [DNA extract: MF1735]. Paratypes: DOMINICAN REPUBLIC: La Vega: "DOMINICAN REP.: La Vega, PN Valle Nuevo, Salto Aguas Blancas; 18°50.60'N, 70°40.68'W; 1655 m; 25.viii.2014, Deler, Fikáček, Gimmel DR21 // Sifting of moist leaf litter in small remnants of montane forest in a small ravine with a spring and on slopes just above the small river" (5 males: NMPC); "DOMINICAN REP.: La Vega, PN A. Bermúdez, 10.3 km W of Manabao, 19°4.37'N, 70°53.26'W, 1270 m, 26.viii.2014, M. Fikáček lgt. (DR22) (2 males: NMPC). Independencia: "DOMINICAN R.: Independencia, PN Sierra de Neiba, 11.3 km NW of La Descubierta; 1650 m, 18°39.81'N, 71°46.17'W; 18.viii.2014, Deler, Gimmel DR13 // disturbed montane cloud forest with many ferns and mosses: in cow excrement" (1 male: NMPC; 1 male: BMNH; 1 male: SBNM) [DNA extract: MF 1264.1 in NMPC].

Diagnosis.

Externally identical with other members of the Cercyon gimmeli species group, it may be only distinguished from them by the morphology of the aedeagus (Fig. 5 e–g): parameres shorter than phallobase; median lobe without spines, narrowly parallel–sided, pointed at apex.

Description.

Measurements. (Fig. 1 g–i) 2.8-3.5 mm long (length of holotype: 3.35 mm); 1.8 –1.9× as long as wide, 3.2 × as long as high (height of holotype: 1.10 mm).

Conforming with description of C. gimmeli , with the following differences: Pterothorax. Punctation of even intervals consisting of small non-setiferous punctures, but here and there with infrequent crescent-shaped larger setiferous punctures; only lateralmost elytral interval completely pale.

Male genitalia. Median projection of sternite 9 (Fig. 5h) moderately wide, slightly widening apically, with few subapical setae. Phallobase (Fig. 5e) longer than parameres, asymmetrically narrowing basally, base widely rounded. Parameres narrow throughout, slightly narrowing towards apex, weakly sinuate on outer face near apex, apex rounded, with one apical and one subapical seta. Median lobe (Fig. 5f) narrowly parallel-sided throughout, apically narrowing into pointed apex (Fig. 5g), apex without spines, gonopore minute, subapical; basal portion with dorsal plate simply bifid.

Etymology.

The new species is named after the indigenous Taíno people inhabiting the Greater Antilles including Hispaniola before and at the time of the arrival of Europeans.

Distribution.

Dominican Republic ( Samaná, La Vega, Independencia) (Fig. 15b).

Biology.

Examined specimens and the associated larvae (see below) were collected from leaf litter of montane forests and from cow dung.