Species Mesopsalis oblongus sp. nov.

Fig. 2

urn:lsid:zoobank.org:act: A0B0F3B3-97F6-47AB-B452-AA4F3E05D6E9

Holotype. Specimen MB.A.4456, ex coll. Jörg Wunderlich, K 84.

Type locality. Myanmar, Hukawng Valley; Burmese amber. Upper Cretaceous (Lower Cenomanian).

Etymology. Latin adjective “oblongus” (= elongated), referring to the elongated ozophores of the holotype.

Diagnosis. As for the genus.

Description. Body oval and markedly subtriangular in profile at the anterior end; total L 3.50, maximum prosomal W behind ozophores 1.53, maximum opisthosomal W 1.90. Prosoma with a tuberculate-microgranular surface. Relatively thin and long conical ozophores in type 2 position (Fig. 2C). L of ozophores 0.31, W at base 0.14, distance between base of ozophores 1.11. Eyes present anterior to ozophores. Eye lenses surrounded by small tubercles (Fig. 2A). Chelicerae relatively small and at least granular on basal segment; basal segment L 0.55, median segment L 0.45, distal segment L 0.25. Pedipalps very small and thin; pedipalp length: fe 0.61, pa 0.23, ti 0.32, ta 0.37. Legs relatively short and somewhat granular; leg tarsi not subdivided, bearing a single smooth claw and numerous setae; tarsus IV without adenostyle; coxa I free, coxae II–III medially fused; leg lengths: I tr 0.28, fe 0.81, pa?, ti 0.58, mt 0.25, ta 0.44; II tr 0.36, fe 0.83*, pa 0.20, ti 0.47, mt 0.20, ta 0.50, total 2.56; III tr 0.31, fe 0.69, pa 0.30, ti 0.36, mt 0.22, ta 0.47, total 2.35; IV tr 0.25, fe 0.83, pa 0.39, ti 0.53, mt 0.20, ta 0.64, total 2.84. Opisthosomal sternal sulci mostly straight and parallel. Gonostome subcircular, W 0.27, L 0.24. Spiracles difficult to determine, presumably C-shaped. Anal plate elliptical and unmodified, W 0.37, L 0.14 (Fig. 2D).