Pachygnathus nasutus, Uusitalo & Ueckermann & Theron, 2020
publication ID |
https://doi.org/ 10.11646/zootaxa.4858.3.1 |
publication LSID |
lsid:zoobank.org:pub:7BA52F1C-4084-4915-A7D9-8DA99379086B |
DOI |
https://doi.org/10.5281/zenodo.4412375 |
persistent identifier |
https://treatment.plazi.org/id/9234667B-0C9B-4CB5-8B50-9704BE10F19B |
taxon LSID |
lsid:zoobank.org:act:9234667B-0C9B-4CB5-8B50-9704BE10F19B |
treatment provided by |
Plazi |
scientific name |
Pachygnathus nasutus |
status |
sp. nov. |
Pachygnathus nasutus sp. nov.
( Figs. 16–28 View FIGURES 16−22 View FIGURES 23−28 )
Description. Dorsum ( Figs. 16, 17 View FIGURES 16−22 ). Length 400–420 μm; holotrichous number of setae per segment dorsally, ad- ditional setae of small size on ventral side, soft integument slightly undulating; sclerotic crista from naso to sensillar area, microplates of setae vi inseparably linked to crista, setae exp small, barbed, medial to anterior pair of lateral eye spots.
Venter ( Fig. 21 View FIGURES 16−22 ). Genital valves each with 13–15 genital setae per valve; 4 anal setae per valve.
Gnathosoma ( Figs. 18–20 View FIGURES 16−22 ). Chelicera beak-like with a few minute teeth on both chelae, and without cheliceral setae; subcapitulum with three pairs of setae and one pair of smooth adoral setae; four sparsely barbed palpal eupathids, clearly separate from each other.
Legs ( Fig 22 View FIGURES 16−22 ). Solenidial formula for tarsi, tibiae, genua and femora on legs I, II, III and IV, respectively: 2- 1-0-0, 2-2-2-0, 3\4-2-2-2, 3-0-0-0, solenidion ω2 well moved anteriorly from adaxial end of lyrifissure, famulus I peg-like distally, famulus II a tiny rod abaxially.
Larva (n=1, Figs. 27, 28 View FIGURES 23−28 )
Dorsum. Length 180 μm, holotrichous, sensillae ve and sci slightly swollen, setae longest on caudal segments.
Venter. Genital area absent, 3–4 anal setae per valve.
Gnathosoma . 1 pair of palpal eupathids.
Legs. Empodia clawless, solenidial formula for tarsi, tibiae, genua and femora on legs I, II and III, respectively: 1-1-0, 2-2-2, 3-2-2, 1-0-0.
Other life stages:
Protonymph (n=3, Figs. 25, 26 View FIGURES 23−28 ), 1 genital seta per valve, subcapitulum with 2 pairs of setae and one pair of adoral setae.
Deutonymph (n=4; Fig. 24 View FIGURES 23−28 ), 5 genital setae per valve.
Adult male (n=5; Fig. 23 View FIGURES 23−28 ), 13−15 genital setae per valve, 10 pairs of eugenitals.
Adult female (n=7; Fig. 21 View FIGURES 16−22 ), 13−15 genital setae per valve, 1 pair of eugenital setae.
Type material. Holotype female, 6 paratype females, 5 paratype males, 4 paratype deutonymphs, 3 paratype protonymphs and 1 paratype larva, from soil under Maytenus cymosa (Celastraceae) , vicinity of Potchefstroom, NORTH-WEST PROVINCE, 13 April 1972, J.A. van Huyssteen. Deposited at ARC-Plant Health and Protection, Pretoria, South Africa.
Differential diagnosis. This species can easily be differentiated from the neotrichous species of the genus by having a holotrichous dorsum in all stages ( Fig. 27 View FIGURES 23−28 ), and femora I with 3 solenidia (instead of 2 or 5–7).
Etymology. The species name refers to the prominent naso.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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