A revision of the New World genus Aptilotella Duda (Sphaeroceridae: Limosininae) Author Luk, Stephen P. L. luk@uoguelph.ca Author Marshall, Stephen A. luk@uoguelph.ca text Zootaxa 2014 2014-02-05 3761 1 1 156 journal article 5940 10.11646/zootaxa.3761.1.1 5444e27e-3e2a-429b-931b-823a2086e3c5 1175-5326 4909057 82E0F1DC-BC98-4E8A-A3D5-21ECB392CC0B Aptilotella umbracatus Luk & Marshall , sp. n. Figures 4 , 49–51 , and 295–305 Description. Habitus as in Figures 4 , 49 , and 50. Body length 1.0– 1.3 mm . Head ground color yellow. Frons finely rugose, its pale areas uniformly constricted by brown stripes; medial brown stripes broad, each approximately onequarter the width of frons, diffuse along the anterior margin; orbital stripes darker, ending at ocular emargination. Ocellar tubercle slightly raised and overlapping medial stripes; ocellar bristle two-thirds the length of frons. Orbital bristle absent; orbital setulae inconspicuous, in three pairs. Interfrontal setae minute, in two pairs. Facial tubercle, excavation and gena shining. Antenna yellow, first flagellomere brown in distal two-thirds. Scutum and scutellum dark reddish-brown to black, shining. Scutum uniformly, sparsely setose, with minute patch of tomentosity on anterior margin laterally and medially; posterior margin tomentose. Scutellum microtrichose; 2.5 times wider than long, 0.7 times the width of scutum. Apical scutellar bristles 2.5 times as long as basal. Pleuron black; anepisternum sometimes with a faint pruinose stripe. Legs yellow; fore coxa brown, mid and hind coxae dark brown; mid tibia and tarsus darker; mid tibia with two anterodorsal bristles. Wing rudiment yellowish. Abdomen black, shining; tergites distally with a row of evenly-spaced setae, syntergite with 2 rows; sternites finely microtrichose, with rows of longer setae posteriorly. Terminalia reddish-brown; epandrium densely microtrichose; cercus and surstylus yellow. Male terminalia. Sternite 5 ( Fig. 298 ) irregularly shallowly excised in posteromedial third, with a simple membranous lining. Synsternite 6+7 ( Figs. 51 , 297 ) densely microtrichose, with a field of minute spinules on medial bridge. Cercus ( Figs. 51 , 295, 296 ) 1.3 times as long as basal width; base triangular, with two inner setae; distal half narrow and curved, basally with a long seta half the length of cercus, and a shorter seta below. Surstylus ( Figs. 51 , 295, 296 ) irregularly angular; posteromedially with a large setaceous tubercle, beneath which are four stout setae of which the anterior one is largest; distal margin squared, with a few small sensory setae. Postgonite ( Figs. 51 , 300 ) sinuous posteriorly, descending arm one-third the total length, with a basal sensory seta; articulatory process for pregonite hooked upward and truncate; articulatory process for basiphallus reduced to a small knob. Hypandrium ( Fig. 301 ) with medial rod straight and slightly slanted to the right; hypandrial arms apparently fused to broad base, slender, with the apex rounded and bent back; pregonite minute, triangular, and fused to base. Aedeagus as in Figure 299 . Basiphallus cylindrical; posteroventrally humped, appearing boot-shaped in lateral profile; articulatory process for postgonite rounded and divergent. Ejaculatory apodeme very slender-tipped. Lateral flanking sclerites with dark dorsal and ventral margins, very narrowly fused posterodorsally and more broadly posteroventrally; dorsum densely armed with heavily-sclerotized teeth. Dorsal sclerite very dark; flattened; apex curved upwards and broadly rounded, with a rudder-like ventral keel. Ventral flanking sclerites paddleshaped; the triangular medial article sharply pointed beneath the basal article; the distal article darkest and irregularly ovate. Female terminalia. Tergite 7 divided medially; distal half densely microtrichose, with several marginal setae. Epiproct semicircular. Each half of tergite 8 ( Figs. 302–304 ) rhomboid, with a weak medial ridge. Cercus three times as long as wide; truncate. Hypoproct a narrow band. Spermathecae ( Fig. 305 ) ridged; collar with two rings of minute stubs; sclerotized ducts very short, less than the diameter of a spermatheca. Variation . Some series consist of darker and barer individuals. These specimens, while possessing the unmistakable dorsal sclerite which characterises Aptilotella umbracatus , differ by most to all of the following: darker overall colour; legs dull yellow to orange, often paler distally; all coxae dark; scutum lacking anteromedial patch of tomentosity; scutellum lacking microtrichosity. Etymology. The species epithet is derived from the Latin umbra , “shadow,” and acatus , “a boat or light vessel,” in reference to the starkly contrasting, rudder-like dorsal sclerite of the distiphallus. Type material. Holotype ♂ , DEBU . PANAMA : Chiriquí , 4.5 km E Cerro Punta , 2500 m , 23–28.v.1977 , carrion, S. Peck. Paratypes . PANAMA : Chiriquí , same label as holotype ( 9♂ , 4♀ , DEBU ) ; 2 km E Cerro Punta , 2200 m , 28.v. – 8.vi.1977 , dung traps , S. Peck ( 2♂ , ♀ , DEBU ) ; same locality as previous label, 1–8.vi.1977 , carrion traps , S. Peck ( ♂ , DEBU ) ; same locality as previous label, 8.vi.1977 , dung, S. Peck ( ♂ , ♀ , DEBU ) ; Boquete , 5.7 km NE, 1500 m , 19.vi.1995 , mixed oak forest, leaf litter, R.S. Anderson ( ♂ , ♀ , DEBU ) ; Boquete , 5.8 km NE, 14.vi.1996 , oak forest, leaf litter, R.S. Anderson ( ♀ , DEBU ) ; Volcán Barú National Park , 5.9 km E Cerro Punta , 2400 m , 14.vi.1995 , oak ridge-bamboo forest, litter, R.S. Anderson ( 2♂ , ♀ , DEBU ) ; same as previous label but at 2150 m , riparian alder forest ( ♀ , DEBU ); Volcán Barú National Park , 11 km W Boquete , 2150 m , 18.vi.1995 , mixed oak forest, leaf litter, R.S. Anderson ( 3♂ , 4♀ , DEBU ) ; Cerro Pando, 12 km NE Santa Clara , 2120 m , 17.vi.1996 , wet cloud forest, leaf litter, R.S. Anderson ( ♀ , DEBU ) ; Hartmann’s Finca , 30.7 km W Volcán , 1800 m , 16.vi.1995 , mixed oak forest, leaf litter, R.S. Anderson ( ♂ , DEBU ) ; La Fortuna area , Finca La Suisse , 1450–1600 m , 11.vi.1995 , oak ridge forest, litter, R.S. Anderson ( 2♂ , ♀ , DEBU ) ; La Fortuna area , Finca La Suisse , 1450 m , 12.vi.1995 , wet montane forest, leaf litter, R.S. Anderson ( ♀ , DEBU ) . COSTA RICA : Limón , Valle del Silencio , La Estación , 9°6’37”N , 82°57’43”W , 2473 m , 26–27.ii.2005 , forest litter, R.S. Anderson ( 4♂ , 2♀ , DEBU ) . Comments . Aptilotella umbracatus has a known range occupying the southerly slopes of the Cordillera de Talamanca in Panama and neighbouring Costa Rica . This species is significantly smaller than A. quadrata and not as boldly marked. The scutal tomentosity and rudder-like dorsal sclerite of the distiphallus are diagnostic.