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Ave not been observed in Mongolarachne, regardless of in depth searches in each light and scanning electron microscopy. Feathery setae:0 absent, 1 present; plumose setae: 0 present, 1 absent; serrate setae: 0 absent, 1 present. Some spiders bear serrate accessory setae (=serrated bristles or false claws) adjacent for the median tarsal claw; these seem as gently s-shaped macrosetae (from which they’re presumably derived) with ventral thorns. They function in conjunction using the median claw in manipulating silk on the web (Foelix 1970) and are characteristic of web-living spiders. In their Atlas of Entelegynae, Griswold et al. (2005) distinguished among these and sinuous plumose setae, seen, for instance, in Phyxelida and Filistata (Griswold et al. 2005, Figs. 132C and 136C, respectively) which presumably possess a similar function. Even so, they scored PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/20180900 the Hypochilidae as lacking serrate accessory setae, yet they do occur in each Hypochilus and Ectatosticta (Electronic MedChemExpress NT157 supplementary material, Fig. 3a , f). The serrate accessory claws ofNaturwissenschaften (2013) one hundred:1171Fig. two M. jurassica, allotopotype male element CNU-ARA-NN2011001-1 (except e: counterpart CNU-ARA-NN2011001-2), morphological information; photomicrographs taken in polarized light with specimen beneath 70 ethanol: a Right leg 1 tibia displaying cuticular structures: m, macroseta; s, seta; t, trichobothrium; b higher magnification of trichobothria of left leg 4, showing crescentic bothrial base; distal to the proper; c basal a part of left leg 4 metatarsus showing detail of calamistrum and easy setae; distal to theleft; d tarsus of left leg 4, showing on the list of paired claws (cl 1), an additional claw (cl two) which may very well be the median claw or the second paired claw, accessory claws (S-shaped serrated setae, 1 shown at a cl), and row of distinctive, sustentaculum-like macrosetae (m); distal to the left; e spinneret region of counterpart specimen, displaying wide, oval field of fine setae anterior to anterior lateral spinnerets (ALS); f pedipalps displaying elongated tibiae with longitudinal field of bristlesFig. three M. jurassica, allotopotype male aspect CNU-ARA-NN2011001-1, SEM photographs: a tip of tarsus four (evaluate with Fig. 2d); paired claw (cl 1) showing seven blade-like pectines, attainable median claw (cl 2), and serrate accessory claw (a cl); scale bar =100 m; b distal part of macroseta of tarsus 4 (left macroseta in (Fig. 2d)) displaying curved tip,and a lot of setae (one particular shown at s); note that each macroseta and setae have an infill of smooth, translucent (crystalline) material (below m, extending to tip; above s arrow), but where this really is broken away, the external surface (above m; left of s arrow) shows a distinctive linear or spiral pattern of short barbs (cf. Lehtinen 1967, Fig. eight); scale bar =20 mNaturwissenschaften (2013) one hundred:1171Mongolarachne (Figs. 2d and 3a) resemble those of Deinopis (Griswold et al. 2005, Fig. 135E). Serrate accessory claws: 0 present, 1 absent. The sustentaculum is often a distinctive macroseta around the ventral side of the distal end of tarsus four adjacent for the serrated bristles in Araneidae (Scharff and Coddington 1997; Griswold et al. 1998; varez-Padilla and Hormiga 2011), plus a line of such macrosetae on the fourth metatarsus and tarsus has also been described for some araneid genera ( varez-Padilla and Hormiga 2011). Supposed sustentaculum-like macrosetae happen to be described in Nephilidae (Kuntner 2005, 2006) and Synotaxidae (Agnarsson 2003), but in these instances the shape o.