Echiniscus C.A.S. Schultze, 1840 Species
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publication ID |
https://doi.org/10.1007/s13127-024-00661-y |
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persistent identifier |
https://treatment.plazi.org/id/03D087EC-FFC6-3D37-FCB6-FD98690CF941 |
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treatment provided by |
Felipe |
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scientific name |
Echiniscus C.A.S. Schultze, 1840 Species |
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Genus: Echiniscus C.A.S. Schultze, 1840 Species : Echiniscus spiniger Richters, 1904 in Richters, 1904a
( Figs. 2 View Fig , 3 View Fig , 4 View Fig , 5 View Fig , Tables 3, 4, 5 with measurements of adult females, juveniles and larvae, respectively; all but larvae from the population VB9, larvae from IS6; raw morphometric data can be accessed as Supplementary Material 4).
Adult females and juveniles phenotypically identical beside the absence of gonopore in the latter; juveniles are also clearly smaller than sexually mature individuals (compare Tables 3, 4). Body plump, massively built, dark orange to reddish and with dark red eye spots in unmounted specimens. Body appendage configuration A-B-C-C d -D-D d -E ( Figs. 2 View Fig , 3 View Fig ); chaetotaxy stable and with rare asymmetries. Dorsal spines slightly longer and more robust than spines B–E. Cirri A quite long (ca. 42% of the body length on average), with small primary clavae near their cirrophores ( Figs. 2 View Fig , 3A–D, F View Fig ). Dactyloid cephalic papillae (secondary clavae) present ( Figs. 2 View Fig , 3A–C View Fig ).
Dorsal plate sculpturing of the spinulosus type, that is with large circular pores penetrating the surface of all dorsolateral plates ( Figs. 2 View Fig , 3 View Fig , 4A View Fig ). However, at the deeper level of focus, minute intracuticular pillars may become visible ( Fig. 4B View Fig ). Only few pores contain dark endocuticular rings ( Fig. 4C View Fig ); dark circumporal rings (dark rims of pores) absent. Ventral cuticle with a typical uniform granulation composed of densely arranged pillars; some adult females exhibit a pair of semicircular subcephalic plates, which only exceptionally may contain single pores ( Fig. 4D View Fig ). Cephalic plate composed of two halves and median, narrow and frontalmost portion; all separated by a keel ( Fig. 3A–B View Fig ), or chalice-like incision in PCM ( Fig. 2B View Fig ). Cervical (neck) plate narrow and with minute pores ( Fig. 3A–B View Fig ). Scapular plate large and with a pair of lateral aporous sutures that demarcate lateralmost, trapezoidal portions ( Fig. 3A–B, D, F View Fig ). Two pairs of large paired segmental plates, each divided in two unequal portions, of which the anterior one bears more distinct pores due to the thinning of cuticular matrix ( Figs. 2 View Fig , 3C–D, F View Fig ). Median plate 1 unipartite; median plate 2 bipartite, but with greatly reduced anterior portion; median plate 3 developed as a thin strip of sculptured cuticle, often hidden under overlapping posterior edge of the second paired segmental plate and caudal plate ( Fig. 3C–D View Fig ). Caudal (terminal) plate large and with evident arrowheads indicate median elevations on pedal plates), E caudal (terminal) plate and hind legs, F juvenile in lateral view. Black incised arrowheads indicate pulvini. Scale bars in μm
sclerotized incisions that terminate with spines E; no faceting or other kind of ornamentation present ( Figs. 2B View Fig , 3E View Fig ).
Spine I ( Figs. 3A–B, D, F View Fig , 5A View Fig ) and papilla IV ( Fig. 3D–F View Fig ) present. Legs I–III with well-delineated pulvini ( Fig. 3D, F View Fig ). All legs with well-developed pedal plates, which are richly endocuticular ring), D a pair of subcephalic plates (a single pore visible on the left side). Scale bars =10 μm
sculptured in a manner identical to the dorsum ( Figs. 3D–F View Fig , 5A–B, E View Fig ). Pedal plates I–III of adult females with a median cuticular elevation, which has reduced porosity ( Fig. 3D View Fig ). Pedal plates IV with embedded dentate collar composed of large and separated teeth ( Figs. 2B View Fig , 3E View Fig ). Claws strongly heteronych, where
µm] of selected morphological structures of adult females of
Echiniscus spiniger mounted in
Hoyer’s medium. Abbreviations:
sp, the proportion between the length of a given structure and the length of the scapular plate expressed in percent claws IV are much higher than claws I–III with differently developed primary spurs: positioned higher on a claw branch and more divergent from it (compare Fig. 5F View Fig to Fig. 5A–E View Fig ). Frequent asymmetries resulting from the lack of some spurs ( Fig. 5A, D View Fig ).
Larvae morphologically coherent with older life stages, but without anus and much smaller than juveniles (compare Tables 4, 5). Body appendage configuration A-C-C d -D-D d -E.
| PCM |
Polish Collection of Microorganisms |
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.