Ochthebius (Cobalius) gorgadensis, Villastrigo & Hernando & Millán & Ribera, 2020

Villastrigo, Adrian, Hernando, Carles, Millán, Andrés & Ribera, Ignacio, 2020, The neglected diversity of the Ochthebius fauna from Eastern Atlantic and Central and Western Mediterranean coastal rockpools (Coleoptera, Hydraenidae), Organisms Diversity & Evolution (New York, N. Y.) 20 (4), pp. 785-801 : 797-798

Ochthebius (Cobalius) gorgadensis sp. nov.

Type locality. Cabo Verde, Ilha de Santiago , Bahia de S. Francisco, 14° 58′ 01.57″ N 23° 27′ 36.61″ W .

Type material. Holotype male ( NMW): “ CVS5 , Cabo Verde, Ilha do Santiago/Bahia de S. Francisco, 3m / Rockpools in volcanic substrate/ 14° 58′ 01.57″ N 23° 27′ 36.61″ W /36.29.2019, C.Hernando leg.”; with red holotype label. Aedeagus dissected and mounted in DMHF on a transparent card, pinned with the specimen . Paratypes ( CHB, IBE, MNCN, NHM, NMW): 67 exx., same data as holotype (one male used for DNA extraction and sequencing, voucher number IBE-AV375); 5 exx. “CVS1, Cabo Verde, Ilha do Santiago /circa Cidade Velha, 4m / Rockpools in volcanic substrate/ 14° 54′ 47.92″ N 23° 37′ 16.31″ W / 21.09.2019, C.Hernando leg.” (one male used for DNA extraction and sequencing, voucher number IBE-AV373); 346 exx. “CVS2, Cabo Verde, Ilha do Santiago/ Tarrafal, 4m / Rockpools in volcanic substrate/ 15° 16′ 31.90″ N 23° 45′ 30.38″ W / 22.09.2019, C.Hernando leg.” (one male used for DNA extraction and sequencing, voucher number IBE-AV372); 57 exx. “CVS4, Cabo Verde, Ilha do Santiago/ circa Mangue de Setes Ribeiras , 3m /Rockpools in volcanic substrate/ 15° 13′ 29.9″ N 23° 36′ 48.6″ W / 23.09.2019, C.Hernando leg.” (one male used for DNA extraction and sequencing, voucher number IBE-AV374); all with red paratype labels .

Description. Habitus as in Fig. 2e . Length: 1.32–1.38 mm; width: 0.54–0.56 mm. Body colour black with a coppery metallic hue; legs and other appendages pale brown.

Upper surface of head ( Figs. 2e and 3b ) smooth and shiny, without microreticulation; with sparse uniform fine setiferous punctures with long thin whitish setae. Anterior margin of labrum regularly arched, with similar punctation as on head, more scarce proximally. Frontoclypeal suture deeply impressed. With two elongated fossae on vertex. Eyes large, prominent; without ocelli.

Pronotum ( Figs. 2e and 4b ) trapezoidal, wider anteriorly, lateral margins arched; margins with irregular, short denticles. With a median longitudinal sulcus, well impressed in some specimens, effaced in others; with small, shallow depressions at both sides of median sulcus, with a well-impressed microreticulation in some specimens. Surface with sculpture and setae similar as on head, setae on lateral pores longer. Anterior and posterior angles rounded; with a broad hyaline band at anterior margin, narrower on posterior margin, expanded at posterior angles.

Elytra ( Figs. 2e , 5b , and 6b ) elongate, oval; margins regularly arched, finely serrated through their length, with shallow, spaced denticles; finely beaded anteriorly, bead effacing posteriorly; apex of elytra with dehiscent suture. With regular series of shallow setiferous punctures with whitish, long recumbent setae; surface covered with micropunctures and small irregular striae; with well-developed membranous wings.

Legs ( Fig. 2e ) long and slender, with rows of long spine-like setae, with natatorial setae on all tibiae.

Surface of metaventrite shiny, microreticulated; posterior margin with a row of spiniform setae. Ventrites i-vi densely pubescent with recumbent setae.

Aedeagus ( Fig. 7b ) with median lobe evenly curved, median region abruptly narrowed; apex dilated, club-like. Distal lobe tubular, very long, regularly arched and inserted laterally on median lobe. Parameres inserted near middle of median lobe, not reaching its apex; internal side of parameres covered with granulated pores with microsetae.

Females noticeably larger, with more impressed depressions on pronotum; apical elytral dehiscence wider. Metaventrite with a stronger punctuation; setae of the metaventrite long and erect, with spiniform setae on lateral margins.

Etymology. Named after the classic name of the Cabo Verde archipelago, “Gorgades”, which according to Pliny the Elder was visited by Hanno on his travels. The name in turn derives from the legends of Perseo and the Gorgonas, and was used by Hanno to refer to the “hairy women” found in the islands. This is also the origin of the name “Gorilla”. The name is and adjective in the nominative singular.

Distribution ( Fig. 10 ). Known only from four localities in the Ilha de Santiago, in the Cabo Verde archipelago.

Habitat ( Fig. 9d ). All specimens were found in supralittoral rockpools on volcanic substrate, close to the seashore.

Figures

Fig. 2 Habitus of a paratype female of O. biltoni from Cefalù (Sicily); b holotype of O. (Cobalius) cortomaltese sp. nov. (after DNA extraction); c Ochthebius (Cobalius) evae sp. nov. (voucher IBE-AV206, after DNA extraction); d holotype of O. (Cobalius) anzar sp. nov. (after DNA extraction); e paratype male of O. (Cobalius) gorgadensis sp. nov. (voucher

Fig. 3 SEM images of the head of a paratype of O. (Cobalius) lanthanus (voucher IBE-AV169; from Ribera and Foster 2018); b paratype male of O. (Cobalius) gorgadensis sp. nov. (specimen from Tarrafal, Ilha de Santiago, Cabo Verde); c paratype male O. (Cobalius) evae sp. nov. (voucher IBE-AV177); d holotype of O. (Cobalius) anzar sp. nov. (ob- served without metallic coating). See Table 1 for details of the specimens

Fig. 4 SEM images of the pronotum of a paratype of O. (Cobalius) lanthanus (voucher IBE-AV169; from Ribera and Foster 2018); b paratype male of O. (Cobalius) gorgadensis sp. nov. (specimen from Tarrafal, Ilha de Santiago, Cabo Verde); c paratype male O. (Cobalius) evae sp. nov. (voucher IBE-AV177); d holotype of O. (Cobalius) anzar sp. nov. (observed without metal- lic coating). See Table 1 for de- tails of the specimens

Fig. 5 SEM images of the base of the elytra of a paratype of O. (Cobalius) lanthanus (voucher IBE-AV169; from Ribera and Foster 2018); b paratype male of O. (Cobalius) gorgadensis sp. nov. (specimen from Tarrafal, Ilha de Santiago, Cabo Verde); c paratype male O. (Cobalius) evae sp. nov. (voucher IBE-AV177); d holotype of O. (Cobalius) anzar sp. nov. (observed without metal- lic coating). See Table 1 for de- tails of the specimens

Fig. 6 SEM images of the apex of the elytra of a paratype of O. (Cobalius) lanthanus (voucher IBE-AV169; from Ribera and Foster 2018); b paratype male of O. (Cobalius) gorgadensis sp. nov. (specimen from Tarrafal, Ilha de Santiago, Cabo Verde); c paratype male O. (Cobalius) evae sp. nov. (voucher IBE-AV177); d holotype of O. (Cobalius) anzar sp. nov. (observed without metal- lic coating). See Table 1 for de- tails of the specimens

Fig. 7 Aedeagus in lateral view of a O. (Cobalius) balfourbrownei (specimen from Boa Vista, Cabo Verde); b paratype of O. (Cobalius) gorgadensis sp. nov. (specimen from Tarrafal); c holotype of O. (Cobalius) anzar sp. nov.; d paratype of O. (Cobalius) lanthanus; (e–g) O. (Cobalius) evae sp. nov. (specimen vouchers IBE-AV193, IBE-AV177, and IBE-AN1193 respectively). Arrows indicate the insertion of the parameres in the median lobe. See Table 1 for details of the specimens

Fig. 10 Known distribution of the studied species

Fig. 9 Habitat of the species of Ochthebius (Cobalius). a, b Temara, Morocco, type locality of O. evae sp. nov.; c Isla Plana, Spain, habitat of additional speci- mens of O. evae sp. nov.; d circa Mangue de Setes Ribeiras, Ilha de Santiago, Cabo Verde, locality of O. gorgadensis sp. nov.