Priacma sanzii, Soriano & Delclòs, 2006

Soriano, Carmen & Delclòs, Xavier, 2006, New cupedid beetles from the Lower Cretaceous of Spain and the palaeogeography of the family, Acta Palaeontologica Polonica 51 (1), pp. 185-200 : 194

Priacma sanzii sp. nov.

Figs. 6E , 8B .

Type locality: Las Hoyas fossil site, La Cierva, Serranía de Cuenca , Cuenca Province, Spain .

Stratigraphic horizon: Second lithosome of finely laminated limestones of La Huérguina Formation, Lower Cretaceous, Barremian (Fregenal−Martínez and Meléndez 2000).

Derivation of the name: Named after the Spanish paleontologist J.L. Sanz.

Material.— Holotype MCCM LH 24524 , only the part. Well preserved specimen, lacking part of legs.

Diagnosis.—From the type species of the genus differs in the absence of spines on edge of elytra. From other fossil species ( P. striata Ponomarenko, 2000 , P. corrupta Ponomarenko, 1986 , P. oculata Ponomarenko, 1997 , and P. longicapitis Ponomarenko, 1997 ) differs in having a smaller size, elongated head and comparatively shorter eyes.

Description.—Measurements: length 8.7 mm; width 2.3 mm; elytra length 5.3 mm. Small and comparatively elongated beetle. Head slightly longer than wider (without mandibles), abruptly narrowed anteriorly towards the eyes. Eyes large, almost as long as temples, occiput truncated. Antennae moniliform, slightly longer than pronotum, scape and pedicel 1.5 times wider than rest of antennomeres, last antennomere elongated and rounded at apex. Cervical constriction indistinct. Pronotum as long as wide, rounded at its 3/4 length, then narrowed posteriorly, about 1.4 times as wide as long at posterior edge. Procoxae rounded, with comparatively wide prosternal process. Mesocoxae transverse, about 1.5 times longer than wider. Mesosternum nearly quadrate. Metasternum transverse, about 1.7 times longer than wider, with well expressed longitudinal and transverse sutures. Abdomen with 5 visible flat ventrites not superimposed each others. Last ventrite 1.7 times as long as previous one. Elytra 4.5 times as long as wide, with rounded apex and indistict cells on surface; epipleura rather wide; main veins poorly distinct from the intercalaries; disc of the elytra with numerous small rectangle cells (about 40 per row). Profemora about three times longer than wider at its medium part. Protibiae somewhat longer than profemora. Whole surface of body covered with dense puntuation.

Figures

Fig. 6. Barremian (Early Cretaceous) ommatins Brochocoleus (Brochocoleini) and Zygadenia (Notocupedini), and cupedins Priacma (Priacmini) and Anaglyphites (Mesocupedini) from Spain. A. Zygadenia diazromerali sp. nov. Holotype MCCM LH 12001a, part, Las Hoyas, Cuenca Province. B. Zygadenia martinclosas sp. nov. Holotype IEI LC 2663a, part, La Cabrúa, Lleida Province. C. Zygadenia longicoxa sp. nov. Holotype MCCM LH 908030a, part, Las Hoyas, Cuenca Province, Lower Cretaceous. D. Zygadenia siniestri sp. nov. Holotype MCCM LH 23515a, part, Las Hoyas, Cuenca Province. E. Priacma sanzii sp. nov. Holotype MCCM LH 24524, part, Las Hoyas, Cuenca Province. F. Anaglyphites zherikhini sp. nov. Holotype MCCM LH 15122a, part, Las Hoyas, Cuenca Province. G.?Anaglyphites pluricavus sp. nov. Holotype IEI LP 97Ga, part, La Pedrera, Lleida Province. Scale bars 2 mm.

Fig. 8. Camera lucida drawings of Barremian (Early Cretaceous) ommatin Zygadenia (Ommatini) and cupedin Priacma (Priacmini) from Las Hoyas, Cuenca Province, Spain. A. Zygadenia siniestri sp. nov. Holotype MCCM LH 23515a, part, dorsal (A1) and ventral (A2) aspects. B. Priacma sanzii sp. nov. Holotype MCCM LH 24524, part, dorsal (B1) and ventral (B2) aspects. Scale bars 2 mm.