NDLI: Coccidian parasites (Apicomplexa: Eimeriidae) of the endemic Florida snake Tantilla relicta Telford (Serpentes: Colubridae)

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Coccidian parasites (Apicomplexa: Eimeriidae) of the endemic Florida snake Tantilla relicta Telford (Serpentes: Colubridae)

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Coccidian parasites (Apicomplexa: Eimeriidae) of the endemic Florida snake Tantilla relicta Telford (Serpentes: Colubridae)

Content Provider	Springer Nature Link
Author	Telford, Sam R.
Copyright Year	1997
Abstract	The endemic Florida snake Tantilla relicta Telford is parasitised by six species of coccidia. Caryospora tantillae n. sp. has nearly spherical oöcysts, 19.6 × 18.9 µm (16–22 × 16–21), with no polar body, and an oöcyst length/width ratio (shape index, SI) of 1.04 (1.00–1.11). Ovoidal sporocysts are 15.1 × 11.6 µm (12–17 × 10–13), with an SI of 1.30 (1.1–1.6), a single prominent Stieda body and a sporocyst residuum. Sporozoites are 14 × 2.5 µm. Caryospora relictae n. sp. also has nearly spherical oöcysts, 18.5 × 17.6 µm (16–22 × 15–20), but is distinguished by having a distinct polar body and a substieda body in sporocysts. The oöcyst SI is 1.05 (1.0–1.2). Sporocysts are ovoidal, 14.8 × 11.4 µm (12–17 × 10–16), with an SI of 1.29 (1.1–1.5) and a sporocyst residuum. Sporozoites are 10–14 × 2–2.5 µm. Isospora cf. wilsoni has ovoidal to spherical oöcysts without a micropyle, measure 17.4 × 17.1 µm (15–19 × 15–19), and have an SI of 1.02 (1.00–1.07). Oöcysts have no polar granule or oöcyst residuum. Sporocysts are ovoidal, 11.4 × 8.2 µm (9–14 × 7–10), with an SI of 1.39 (1.18–1.62). Both a Stieda body and sporocyst residuum are present, but a substieda body, characteristic of I. wilsoni as described, was not observed. Sporozoites are 7–8 × 2.5–3 µm. An Eimeria sp., of which the sample was too small to justify taxonomic designation, has nearly spherical oöcysts without micropyle, a size of 22.5 × 20.9 µm (22–23 × 20–22), an SI of 1.08 (1.00–1.12) and no polar granule. Sporocysts measure 12.5 × 8.9 µm (11–14 × 7–11) and have an SI of 1.44 (1.18–1.87), a sporocyst residuum and no Stieda body. Sporozoites are 13 × 5 µm. Eimeria amphorae n. sp. has ovoidal to spherical oöcysts without a micropyle, a size of 24.8 × 22.3 µm (23–27 × 20–26), an SI of 1.12 (1.02–1.25) and no polar granule or oöcyst residuum. Sporocysts are elongate, 18.4 X 8.0 µm (17-22 × 6-9.5), with an SI 2.33 (1.79–3.00) and no discernible Stieda body or sporocyst residuum. Sporocyst shape differs by orientation, rectangular to amphora-like, tapering abruptly to a blunt point; sporozoites large, 15.5 × 4.2 µm. A biliary parasite, Eimeria pleistocenensis n. sp., has ovoidal to elongate oöcysts, without micropyle, with a size of 27.8 × 19.4 µm (23–32 × 14–23), with an SI of 1.44 (1.17–1.82) and an oöcyst residuum but no polar granule. Sporocysts ovoidal, 10.7 × 8.6 (9–13 × 8–10), with an SI of 1.24 (1.05–1.37), a sporocyst residuum, but without Stieda body; sporozoites 8.8 × 2.7 µm. Similar oöcysts from other Tantilla relicta populations, T. relicta neilli in north Florida T. relicta pamlica in southeastern Florida and T. relicta relicta in south-central Florida, have dimensions that lie within the range of variation in the type population and identically shaped sporocysts that suggest conspecificity with E. pleistocenensis, and presence of the species in the precursor to Tantilla relicta prior to the second interglacial period.
Starting Page	17
Ending Page	25
Page Count	9
File Format	PDF
ISSN	01655752
Journal	Systematic Parasitology
Volume Number	36
Issue Number	1
e-ISSN	15735192
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1997-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Plant Sciences Animal Anatomy Morphology Histology
Content Type	Text
Resource Type	Article
Subject	Parasitology

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