Operclipygus mangiferus, Caterino, Michael S. & Tishechkin, Alexey K., 2013

Caterino, Michael S. & Tishechkin, Alexey K., 2013, A systematic revision of Operclipygus Marseul (Coleoptera, Histeridae, Exosternini), ZooKeys 271, pp. 1-401 : 278-280

Operclipygus mangiferus sp. n. Figs 73D74 A–DMap 26

Type locality.

COSTA RICA: Guanacaste: Liberia [10°38'N, 85°26'W].

Type material.

Holotype male: "COSTA RICA: Guanacaste, Liberia, 20 May 1993, 50m, J. & A. Ashe #047, ex: rotting mangos"/ "SEMC0903635 KUNHM-ENT" (INBIO). Paratypes (8): 1: same data as type; 1: Parque Nac. Barra Honda, 100m, iv.1995, M. Reves, (INBIO); 1: Est. Palo Verde, Ref. Nac. Fauna Silv., R.L. Rodriguez, 10m, vi.1991, U. Chavarria, (INBIO); 1: Parque Nac. Guanacaste, 9km S Santa Cecilia, Est. Pitilla, 13.viii.1966, carrion trap, S. Peck (FMNH). NICARAGUA: Granada: 1: Volcan Mombacho, Santa Ana #1, 2.vi.1998, malaise trap, J.M. Maes (MEL); Masaya: 3: Las Flores, vi.1994, malaise trap, J.M. Maes (MEL).

Diagnostic description.

Length: 1.75-1.81 mm, width: 1.47-1.59 mm; body rufobrunneus, elongate oval, sides weakly rounded; frons weakly depressed, with fine, sparse ground punctation; sides of frontal stria short, impressed near upper margin of eye, broadly interrupted over antennal bases, short, transverse across middle; labrum narrow, less than twice as wide as long, apex asymmetrically emarginate, left side protruding, with small apical process beneath margin; left mandible untoothed, right with small acute basal tooth; pronotal disk lacking prescutellar impression, with fine, inconspicuous ground punctation and numerous coarse punctures at sides; marginal pronotal stria complete or narrowly interrupted behind head; submarginal pronotal stria continuous across anterior margin, extending along only anterior third to half of lateral margin, obsolete basally; elytron with two complete epipleural striae, inner and outer subhumeral striae absent, striae 1-3 complete, well impressed, 4th stria present in basal third and as apical fragment, 5th stria absent, sutural stria present in apical two-thirds, very briefly curving laterad at apex, continued along apex by sparse series of punctures; prosternal keel truncate to very weakly emarginate at base, with complete carinal striae which are very narrowly separated anteriorly in most individuals; anterior mesoventral margin very weakly projecting, marginal stria very fine but usually complete between broadly arched mesometaventral stria and mesoventral margin; lateral metaventral stria extending to middle of metacoxa; 1st abdominal ventrite with two lateral striae, both obsolete in posterior half; lacking postmetacoxal stria and fovea; propygidium and pygidium lacking microsculpture; propygidium with medium-sized, round, shallow punctures irregularly separated by about their diameters in basal half, punctures smaller and sparser in apical half; pygidium wide, short, about equal in midline length to propygidium, with fine, sparse ground punctures and slightly coarser punctures evenly scattered throughout; marginal pygidial stria absent. Male genitalia (Fig. 74 A–D) very similar to those of Operclipygus latifoveatus , differing as follows: T8 with apical emargination distinct, narrow, ventrolateral apodemes well separated along midline; S8 with sides subparallel, apical guides narrow throughout, halves not fused ventrobasally; S9 with base more narrowly rounded, apex with very small median emargination, basolateral corners not prolonged proximad; tegmen widening slightly from base, widest one-third from apex, narrowed to subacute apex, medioventral process very weak, not or barely projecting beneath; median lobe about one-half tegmen length.

Remarks.

This species is rather isolated in the group, completely lacking any marginal pygidial stria, and having strongly impressed elytral striae 1-3 (Fig. 73D). These characters, in addition to the anteriorly continuous, but posteriorly obsolete submarginal pronotal striae are sufficient to distinguish it.

Etymology.

The name of this species refers to the discovery of the types of this species in association with rotting mangoes, though this is probably not an exclusive habit.