Costarina Platnick and Dupérré, 2011

Platnick, Norman I., Berniker, Lily & Víquez, Carlos, 2014, The Goblin Spider Genus Costarina (Araneae, Oonopidae), Part 2: the Costa Rican fauna, American Museum Novitates 2014 (3794), pp. 1-76 : 3

Costarina Platnick and Dupérré

Costarina Platnick and Dupérré, 2011: 50 (type species by original designation Dysderina plena O. P.-Cambridge, 1894).

DIAGNOSIS: Members of Costarina can be recognized by the presence of three transverse sternal ridges together with the absence of grooves connecting either the anterior or posterior pairs of spiracles (see Platnick and Dupérré, 2012: 3).

DESCRIPTION: For all characters not mentioned here, see Platnick and Dupérré, 2012: 3. Total length of males 1.6–2.5, of females 1.8–2.8. Carapace, sternum, mouthparts, abdominal scuta usually orange-brown, legs usually pale orange, but sclerotized parts notably darkened in C. superplena , isidro , quepos , obtina , pittier . Posterior portion of pars cephalica usually with large, U-shaped smooth area, but smooth area reduced in females of C. cima , viejo , aguirre , meridina , ramon , chonta , absent in females of C. plena , carrillo , pity , cerere , frantzius , gemelo , absent in both sexes of C. maritza , concinna . ALE separated by roughly their radius. Anterior margin of sternum usually with continuous transverse groove but groove interrupted medially in at least C. carara , watina , isidro , parabio ; surface of sternum with three transverse ridges connected by median longitudinal ridge, longitudinal ridge usually with anastomosing branches but sometimes simple or weak, rarely reduced to connecting only two anteriormost transverse ridges. Cheliceral retromargin usually without tooth. Serrula apparently absent (scanned only in C. plena ). Dorsal scutum of males usually covering full length, width of abdomen, of females covering from 3/4 to full length, width of abdomen. Postepigastric scutum of males usually extending to nearly full length of abdomen; postepigastric scutum of females almost semicircular, usually free, but partially or entirely fused to epigastric scutum in some species (see Introduction for details), extending to at least 2/3 of abdomen length. Spinneret scutum present as incomplete ring with fringe of long setae in females, but often reduced to narrow rim or detectable only by setal positions in males. Typical leg-spination pattern of males (only surfaces bearing spines listed): femur I p0-0-2, r1-1-1; tibiae I, II v4-4-1p; metatarsi: I v2-2-1p; II v3-0-2, of females: femora I, II p0-0-2, r1-1-1; tibiae: I v4-4-2; II v4-4-1p; metatarsi: I v2-2-2; II v3-0-2.