Elliptochthonius profundus Norton, 1975
|
publication ID |
https://doi.org/ 10.11646/zootaxa.5187.1.6 |
|
publication LSID |
lsid:zoobank.org:pub:01613E39-A5C8-4D08-AD46-7EA0C2537D2F |
|
DOI |
https://doi.org/10.5281/zenodo.7078240 |
|
persistent identifier |
https://treatment.plazi.org/id/D3490501-9137-3C0D-FF0E-E02E429591F1 |
|
treatment provided by |
Plazi |
|
scientific name |
Elliptochthonius profundus Norton, 1975 |
| status |
|
Elliptochthonius profundus Norton, 1975 View in CoL
( Figs 1–9 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 )
Diagnosis of adult ( Figs 1 View FIGURE 1 , 2 View FIGURE 2 ). Body elongate oval, dorsoventrally flattened, widest at level of notogastral setae d 3. Body size: 565–595 × 200–209. Body colour light yellowish. Surface sparsely microfoveolate; prodorsum tuberculate sculpturing; posterior part of gastronotum with large foveolae; lateral and ventral sides partially striate. Rostrum laterally with irregular teeth. Rostral, lamellar, anterior and posterior exobothridial setae short, simple; interlamellar seta long, slightly lanceolate; bothridial seta fusiform, shortly ciliate. Dorsal or postpedal transverse scissure developed between setal rows d and e. With 16 pairs of slightly lanceolate notogastral setae; of these, anterior notogastral half with six pairs (setal rows c, d), posterior notogastral half with 10 pairs (setal rows e, f, h, p). Four pairs of subcapitular and one pair of adoral setae simple. Palp four-segmented; setation: 1-0-2-7(+ω). Cheliceral seta cha short, needle-shaped; chb long, simple. Supracoxal seta present. Epimeres I and II separated medially by membrane, epimeres III and IV fused medially. Setal formulas for epimeres: 3-2-3-4. With eight pairs of genital (on plate six setae in paraxial row, two setae in antiaxial row), one pair of aggenital, three pairs of anal, four pairs of adanal setae. Leg tarsi tridactylous, with a highly reduced central claw. Famulus bifurcate. Number of solenidia on genu-tibia tarsus: I: 2-1-3; II: 1-1-1; III, IV: 1-1-0.
Description of juvenile instars ( Figs 3–9 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 ). Form. Body elongate oval, but much stout than adults (especially larva), slightly flattened dorsoventrally.
Measurements. Total length of larva: 215–232; protonymph: 282–298; deutonymph: 365–381; tritonymph: 415–431. Total width of larva: 83–99; protonymph: 99–116; deutonymph: 132; tritonymph: 149–166.
Integument ( Figs 3 – 5 View FIGURE 3 View FIGURE 4 View FIGURE 5 ). Body cuticle colourless except posterior part of gastronotic region light brown. Surface sparsely microfoveolate; foveolae mostly very small, visible under high magnification in dissected specimens, but foveolae in posterior part of gastronotic region larger, distinctly visible. Prodorsum and lateral side of gastronotic region tuberculate; tubercles in basal part of prodorsum largest. Gastronotic region near scissure transversely striate; sternal region longitudinally striate; lateral part of gastronotic region and cuticle near aggenital and adanal regions striate.
Prodorsum ( Figs 3A, C View FIGURE 3 ; 5A View FIGURE 5 ). Relatively long, about 1/2 (in larva) and 1/3 (in nymphs) length of gastronotic region (measured in lateral view). Rostrum broad, laterally with slight irregular teeth. Rostral, lamellar, interlamellar, anterior exobothridial and posterior exobothridial setae setiform, slightly barbed; seta in comparatively long, much longer than other prodorsal setae. Bothridial seta fusiform, shortly ciliate. Setae lengths during ontogeny as presented in Table 1 View TABLE 1 .
Gastronotic region ( Figs 3 – 5 View FIGURE 3 View FIGURE 4 View FIGURE 5 ). Gastronotum widest at level of setae c 3 and/or d 3, tapering posteriorly. Dorsal transverse scissure well visible, located between setal rows d and e, continuing lateroventrally. Larva with 13 pairs, nymphs with 16 pairs of gastronotic setae; of these, anterior gastronotic part (before scissure) with six pairs of setae (setal rows c, d), posterior gastronotic part (behind scissure) with seven and 10 pairs (except paraproctal setae) of setae in larva and nymphs, respectively. All setae (except thin, smooth p 1 – p 4 on paraproctal segment in larva) setiform (centrodorsal setae usually slightly blunt-ended), barbed. Strong ventral ridge developed anterior to setae h 1 in larva and protonymph, anterior to p 1 and p 2 in deuto- and tritonymphs. Opisthonotal gland opening and cupules ia, im, ip well visible. Setae lengths during ontogeny as presented in Table 1 View TABLE 1 .
Gnathosoma ( Fig 6 View FIGURE 6 ). Subcapitulum slightly longer than wide, simple, without secondary articulation. All subcapitular setae setiform, slightly barbed, similar in thickness; m 2 (fourth pair of subcapitular setae) added in deutonymph. One pair of adoral setae setiform, smooth. Dorsal and lateral lips smooth. Palp four-segmented, trochanter and femur fused; setation: 1-0-2-7(+ω); solenidion of palptarsus long, free, bacilliform. Postpalpal seta thorn-like, blunt-ended, smooth. Chelicera with two setae and some chitinous barbs on both antiaxial and paraxial sides; cha needle-shaped; chb setiform, smooth. Gnathosoma and setae lengths during ontogeny as presented in Table 2 View TABLE 2 .
Epimeral and lateral podosomal regions ( Figs 3B, C View FIGURE 3 ; 4B, C View FIGURE 4 ; 5B View FIGURE 5 ). Supracoxal seta eI thorn-like, smooth. Claparède’s organ long, clavate. Setal formulas for epimeres in larva: 3-1-2; protonymph: 3-2-3-1; deutonymph and tritonymph 3-2-3-4. Setae 1c in larva modified to ring-like thickening structure; others setiform, thin, roughened. Setae lengths during ontogeny as presented in Table 1 View TABLE 1 .
Anogenital region ( Figs 3B View FIGURE 3 ; 4B, C View FIGURE 4 ; 5B View FIGURE 5 ). Ontogeny of genital, aggenital, adanal, and anal setal formulas, from larva to tritonymph: 0-1-3-6, 0-0-1-1, 0-4-4-4, 0-0-3-3, respectively, paraproctal segment of larva with four pairs of setae p. All setae setiform, thin, smooth or slightly roughened. In deutonymph, genital setae on genital plate inserted in one row; in tritonymph, four setae in paraxial row, two setae in antiaxial row. Aggenital seta inserted at level of g 2. Cupules ih, ips, iad, and ian appearing in normal ontogenetic pattern. Setae lengths during ontogeny as presented in Table 1 View TABLE 1 .
Legs ( Figs 7 – 9 View FIGURE 7 View FIGURE 8 View FIGURE 9 ). Claw of each leg slightly barbed dorsally. Formulas of leg setation (including famulus) and solenidia in larva: I (0-2-3-5-17) [2-1-1], II (0-3-3-4-12) [1-1-1], III (0-2-2-3-11) [1-1-0]; protonymph: I (0-3-4-5- 18) [2-1-1], II (0-3-4-4-12) [1-1-1], III (1-2-2-3-11) [1-1-0], IV (0-0-0-0-5) [0-0-0]; deutonymph: I (0-4-5-6-19) [2-1-2], II (1-4-4-4-12) [1-1-1], III (2-2-3-3-11) [1-1-0], IV (1-2-1-2-11) [1-1-0]; tritonymph: I (0-6-5-6-19) [2-1-3], II (1-4-4-4-14) [1-1-1], III (2-2-4-3-12) [1-1-0], IV (1-2-3-4-11) [1-1-0]. Homology of leg setae and solenidia as indicated in Table 3 View TABLE 3 . Famulus bifurcate, with long setiform and short bacilliform branches. Solenidia ω 1 on tarsus I and ω on tarsus I thick, bacilliform; ω 2 and ω 3 on tarsus I setiform; φ on tibia I and σ’, σ” on genu I rod-like; φ on tibiae II – IV and σ on tibiae II – IV bacilliform.
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.