Cheiroseius ovalis, Bhattacharyya & Bhattacharyya, 2004
publication ID |
https://doi.org/ 10.11646/zootaxa.403.1.1 |
DOI |
https://doi.org/10.5281/zenodo.5027768 |
persistent identifier |
https://treatment.plazi.org/id/4F7E261A-7722-1224-C42D-FEC0FDD6F94E |
treatment provided by |
Felipe |
scientific name |
Cheiroseius ovalis |
status |
sp. nov. |
Cheiroseius ovalis sp. nov. ( Figs. 1–8 View FIGURE 1 View FIGURE 2–3 View FIGURE 4–8 )
Diagnosis: Dorsal shield with 36 pairs of thick, spinelike setae; all dorsal setae on prominent tubercles; setae J5 simple, setae Z4 longest; sternal shield with conspicuous marking; ventrianal shield broadly oval, with seven setae; six rows of deutosternal denticles, each row with 7–14 denticles.
Female: Holodorsal shield (448µ long along midline, 264µ wide) highly sclerotized, with dense reticulation, and with 36 pairs of thick, spinelike setae; anterior region with 21 pairs of setae, remaining setae on posterior region of the shield; setae J4–J5, Z5 and S5 are 32µ, 12µ, 36µ and 39µ long respectively; setae Z4 longest (41µ) of all dorsal setae; lateral membrane lineated, with 7 pairs of setae; all setae on dorsal shield borne on prominent tubercles ( Fig. 1 View FIGURE 1 ); peritreme visible dorsally, extending upto beyond setae j1 (16µ); dorsal shield complement of poroids and gland pores difficult to discern amidst ornamentation.
Tritosternum with elongate base, lacinae paired, sparsely plumose ( Fig. 2 View FIGURE 2–3 ). Sternal shield (88µ long along midline, 166µ wide at level of anterolateral corners) extended anterolaterally, with three subequal (22µ – 24µ) sternal setae; reticulation and conspicuous marking on sternal shield as depicted in fig. 3; metasternal shields large, with metasternal setae (18µ); genital shield finely granulated along posterior margin, truncate posteriorly, widened behind genital setae forming slightly convex lateral margin; hyaline anterior margin of genital shield extending over the region posterior to sternal shield to level of metasternal setae; remnants of endopodal shield present between coxae II–IV; posterior extremities of exopodalperitrematal shield broad, finely granulated, with several components, curving behind coxae IV; ventral membrane between genital and ventrianal shield folded, with 5 pairs of setae, including the two pairs posterior to the level of paraanal setae. Peritreme wide, stigmatal opening large, placed at level of anterior half of coxae IV. Ventrianal shield broadly oval, slightly wider (134µ) than long (120µ), coarsely granulated posteriorly, with 7 simple, subequal (31µ – 32µ) ventral setae; anal opening large; cribrum present in the form of a broad strip behind the postanal seta.
Epistome trispinate, each spine denticulate, with 2–3 spines each ( Fig. 4 View FIGURE 4–8 ); hypognathum with short, peglike corniculi; paired corniculi almost parallel to each other; internal malae finely fringed extending upto midlevel of corniculi; six rows of deutosternal denticles, with 7–14 denticles in each row; sixth row widest, discontinuous ( Fig. 5 View FIGURE 4–8 ); four pairs of simple, subcapitular setae; posterior hypostomatic (26µ) and palpcoxal setae subequal (28µ) but almost half length of anterior hypostomatic setae (52µ); besides simple setae, thornlike and clubshaped setae present on palpal genu and tibia respectively ( Fig. 6 View FIGURE 4–8 ). Chelicerae damaged, not examined.
All legs with welldeveloped ambulacra and claws; tibia I slightly shorter (150µ) than tarsus I (160µ); excluding ambulacra, length of legs I–IV as follows: 720µ, 460µ, 420µ and 530µ; tarsus of legs I and II depicted in figs. 7 and 8 respectively; all leg setae smooth; setation of legs IIIIIIIV, respectively: femora 111066 and genua 131089.
Male: Unknown.
Type: Holotype female, Zoological Survey of India compound, Jodhpur , Rajasthan; ex. decomposed grass litter collected from semidried drainage system; 23 March 2003; A.K. Bhattacharyya coll.
Distribution: INDIA: Rajasthan.
Differential diagnosis: The new species, Cheiroseius ovalis differs from all the known species of Cheiroseius in having 7 setae on its ventrianal shield. The only known other Cheiroseius species which possesses 7 setae on ventrianal shield is Cheiroseius dromadis ( Evans and Hyatt, 1960) . Besides the above similarity, the new species shows affinities with C. dromadis in having a threepronged tectum, which is common for most of the Cheiroseius species. C . dromadis shows a number of dissimilarities with the new species, on both dorsal and ventral aspects such as: presence of 37 pairs of pilose dorsal setae; presence of dorsal hump; absence of anterolateral marking on sternal shield; weakly developed tritosternum; shape of metasternal, genital and ventrianal shield; comparatively longer length of ventral setae; structure of periitrematal shield; longer internal malae (several times longer than that of C. ovalis ); strongly developed ambulacra and presence of clubshaped setae on tarsus II. The new species also shows affinities with C. parbatensis ( Evans and Hyatt, 1960) in having following similarities: number, nature and almost same relative length of dorsal setae, similar shape of tectum, sternal and metasternal shield. However, the new species differs from C. parbatensis in the following aspects: shorter length of setae J4, prominent, characteristic marking on anterolateral edge of sternal shield, shape of genital and ventrianal shield, number of setae on ventrianal shield and setation of tarsus II.
Etymology: The species name ovalis has been derived from the broadly oval shape of the ventrianal shield.
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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