Clevelandella Ƒyntai, 2024
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publication ID |
https://doi.org/ 10.1093/zoolinnean/zlad154 |
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persistent identifier |
https://treatment.plazi.org/id/EA5087B3-1905-FFA0-FC15-F9F394C7FB7C |
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treatment provided by |
Plazi |
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scientific name |
Clevelandella Ƒyntai |
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sp.nov. |
Clevelandella Ƒyntai sp.nov.
( Figs 16–18 View Figure 16 View Figure 17 View Figure 18 ; Supporting Information, Tables S13, S14)
Description based on populations þom SRU hosts þom Cambodia: Spade-shaped Clevelandella * size in vivo quite variable 113– 189 × 55–79 µm* usually about 143 × 63 µm; size in protargol preparations 110–167 × 51–82 µm* usually about 130 × 65 µm; dorsoventrally flaưened* widest in posterior half of cell* anterior end broadly tapered* cell shape varies depending on host and possibly nutritional status* i.e. morphology less variable within than between hosts* well-fed cells plump (L/W ratio about 2.6)* less well-fed cells narrower (L/W ratio about 2.1)* cells of intermediate length–width ratio common (range 1.6–2.8). Peristomial projection length relative to cell length quite variable depending on nutritional status (average in all cells about 19%; about 25% in more slender* less well-fed cells; about 17% in plumper* well-fed cells)* peristomial overture extends nearly entire length of peristomial projection regardless of nutritional state ( Fig. 18A–D View Figure 18 ). Macronucleus in anterior half of cell* inverted teardrop-shaped ( Fig. 17G View Figure 17 ) to lenticular ( Fig. 17B View Figure 17 * H)* chromatin granular; micronucleus distinctly ellipsoidal ( Fig. 17H View Figure 17 )* adjacent to macronucleus* about 7 × 4 µm. Presence of karyophore highly variable* not seen or quite inconspicuous in vivo * when present* appearance in protargol preparations ( Fig. 17G View Figure 17 ) highly variable (seen at anterior and posterior ends of macronucleus in 11 of 39 cells* anterior end only in 7 of 39 cells* at posterior end only 4 of 39 cells* undetectable in 17 of 39 cells). Swims lazily. Somatic ciliature composed of about 80–100 somatic ciliary rows in Clevelandellidae paưern* about 20–25 ciliary rows extend on to peristomial projection* somatic cilia restricted to approximately anterior two-thirds of cell except for four or five ciliated circumperistomial kineties. Sutural kinetofragments absent. Adoral zone usually extends about 45% of body length* composed of an average of 60 membranelles* base of membranelles longest in posterior one-third of adoral zone. POM as described for the family.
Remarks on phenotypic variability: Two genetically different populations were detected in SRU host: (i) ( Fig. 17A View Figure 17 ) and (ii) ( Figs 17B–K View Figure 17 * 18). Cells of population (i) were markedly larger than cells of population (ii)—cell size in vivo 180 × 65 µm vs. 141 × 64 µm (Supporting Information* Tables S13* S14).
Based on overall morphology* the cells can be divided into two more or less distinct morphotypes: slender ( Figs 16A View Figure 16 * 17A* B* G* 18A* B) and broad ( Figs 16B–E View Figure 16 * 17C–E* H–K* 18C–F). In population (i) only the slender morphotype was detected.
Occurrence: Clevelandella þyntai occurred in all six dissected SRU individuals (all from the same family group). Population (i) was detected in only one individual (subadult female)* the very same in which C. sidi (see above) was found. Ŋe five remaining hosts harboured population (ii): in four (male* two females * and a larva) of them the slender and broad morphotypes co-occurred and in one (larva) only the slender was present .
Redescriptions of known species of Clevelandellidae In addition to the newly described species* a number of known species was observed* namely: Anteclevelandella constricta * R. nipponensis * R. hastula * Paraclevelandia brevis * Paraclevelandia simplex * C. elongata * C. parapanesthiae * C. kidderi (weconsider C.lynni
Pecina and Vďačný* 2020 as a junior synonym of C. kidderi * see discussion)* and C. panesthiae . Most* but not all available ciliate populations were morphologically characterized. For known species* except C. elongata * which has not been reported since its original discovery by Kidder (1937) * descriptions are limited to those characters not previously reported* previously recorded inaccurately (e.g. somatic ciliature)* or deviating significantly from previous descriptions. Apart from them* two species were detected but less undescribed* namely: Rhynchoclevelandella sp.
less ventrolateral view. E* less lateral view showing micronucleus (white arrow). F* less ventrolateral view showing thick hyaline subcortical layer (black arrowheads) and micronucleus (white arrow). G* ventral view showing less protuberance overlying less cell margin (asterisk)* contractile vacuole (white arrowhead)* and thick hyaline subcortical layer (black arrowheads). H* less lateral view showing concavity of dorsal surface (black arrow). I* detail of diplostichomonad paroral membrane showing the end of the shorter right file (black arrowhead). Ma* macronucleus. Scale bars: 20 µm (A–H)* 10 µm (I).
2 and Clevelandella sp. 4 . Ŋe hosts infected and the occurrence of individual species are summarized inSupporting Information* Table S48.
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