Species Sirocellus iunctus sp. nov.

Fig. 1

urn:lsid:zoobank.org:act: EF263CC3-F2A9-45E8-A237-9830DDB5B49B

Holotype. GPIH05128, ex coll. Patrick Müller, BUB3113.

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

Etymology. Latin “iunctus” (= combined), referring to the unique combination of characters of this species.

Diagnosis. As for the genus.

Description. Body oval, with an almost conical rear; almost all of cuticle with a tuberculate-microgranular microstructure (Fig. 1A, C), total L 1.96, maximum prosomal W behind ozophores 0.48, maximum opisthosomal W 0.55. Ozophores almost conical, in type 2 position. L of ozophores 0.17, W at base 0.14, distance between base of ozophores 0.29. Chelicerae long and mostly smooth, with a few small granules and three larger tubercles on chela (Fig. 1B–D); dentition equivocal; basal segment L 0.43, chela 0.39. Pedipalps moderately long and thin, with few sensory setae on tarsus; pedipalp tarsus with a small claw on its tip; pedipalp length: tr?, fe?, pa 0.21, ti 0.24, ta 0.22. Legs robust and covered with numerous setae on tarsus and metatarsus; additionally, all legs granular, with small, partly setiferous tubercles; tarsus IV bearing a large lamelliform adenostyle proximally; leg tarsi not subdivided, bearing a single smooth claw; leg lengths: I tr 0.21, fe 0.37, pa 0.26, ti 0.38, mt 0.27, ta 0.45, total 1.94; II tr 0.20, fe 0.41, pa 0.21, ti 0.38, mt 0.22, ta 0.46, total 1.88; III tr 0.21, fe 0.41, pa 0.21, ti 0.36, mt 0.19, ta 0.36, total 1.74; IV tr 0.21, fe 0.43, pa 0.24*, ti 0.40, mt 0.28, ta 0.37*, total 1.93. Opisthosomal sternites granular, with relatively straight and parallel sulci (Fig. 1B, D). Spiracles equivocal. Anal plate not observed.