Chitinotax - ct_main - Ancyrochitina

Chitinotax - ct_main - Ancyrochitina Chitinotax - ct_main - Ancyrochitina

Ancyrochitina

NB This site is under active development

Classification: ct_main -> Lagenochitinidae -> Ancyrochitininae -> Ancyrochitina
Sister taxa: Ancyrochitina, Clathrochitina, Plectochitina, Alpenachitina, Sommerochitina

Daughter taxa (time control age-window is: 0-800Ma)
				Ancyrochitina aculeata Conical vesicle with a flat base, a cylindrical neck with a thin collar, short processes that may be simple or branched at the ends, and a surface covered with fine, spaced thorny hairs.
				Ancyrochitina alaticornis
				Ancyrochitina alhajrii
				Ancyrochitina ancyrea Conical vesicle with six long, curved basal appendices that branch antler-like at their tips.
				Ancyrochitina angustata
				Ancyrochitina ansarviensis
				Ancyrochitina arirambaense Conical body and a long cylindrical neck. The basal margin is provided with 6 long and simple appendices.
				Ancyrochitina arkonensis Conical vesicle with a cylindrical neck, sparse basal spines, and oral edge ornamentation of short knobs or bifurcating spines.
				Ancyrochitina asterigis Small size, conical-ovoid vesicle with a flared neck, and a crown of 6–8 robust basal appendices that branch into anchor-like tips.
				Ancyrochitina aurita Cylindro-conical vesicle with both the appendices and auricles lacy.
				Ancyrochitina aymestreyensis
				Ancyrochitina barbescens
				Ancyrochitina batidoriformis
				Ancyrochitina biconstricta Elongated cono-cylindrical vesicle with two distinct constrictions near the base and short processes around the base.
				Ancyrochitina bifurcaspina
				Ancyrochitina bojnourdensis
				Ancyrochitina bornholmensis
				Ancyrochitina brevicollis
				Ancyrochitina brevicornuta A long, slender Ancyrochitina species with four simple, short and conical appendices.
				Ancyrochitina brevispinosa
				Ancyrochitina bullispina Cylindro-conical vesicle with 6–8 short, hollow, small processes bearing bulbous bases, and a smooth surface with a slightly expanding cylindrical neck.
				Ancyrochitina camilliae
				Ancyrochitina cantabrica Piriform to cylindro-conical vesicle with a very long neck (3–4× body length), 4–6 claw-like, curved, hollow processes.
				Ancyrochitina clathrospinosa
				Ancyrochitina columella Slender cono-cylindrical vesicle with a short neck, forked basal spines, and sparse fine wall spines, maximum width at the base and flaring collarette.
				Ancyrochitina convexa
				Ancyrochitina corniculans
				Ancyrochitina cornigera Conical vesicle with a short cylindrical neck and a crown of 6–8 stout, simple basal spines.
				Ancyrochitina deltoidea
				Ancyrochitina desmea
				Ancyrochitina diabolus
				Ancyrochitina digitata
				Ancyrochitina dunensis Short vesicle with a spherical to pyriform body, a flaring cylindrical neck, and few (1–8) processes of stable complexity, with a smooth or sparsely denticulate surface.
				Ancyrochitina effusa
				Ancyrochitina ellisbayensis
				Ancyrochitina erichseni Large, slightly convex chamber base, smooth collar, and numerous short basal appendages that bifurcate only at their tips.
				Ancyrochitina exilis
				Ancyrochitina faraghanensis
				Ancyrochitina fatemae
				Ancyrochitina flexuosa Conical vesicle with 8–10 long, spiny, recurved processes branching up to five orders around the base and neck, with basal processes bent apertureward and neck spines bent downwards.
				Ancyrochitina florentini
				Ancyrochitina floris
				Ancyrochitina fragilis Conical to ovoid vesicle with a long cylindrical neck widened at the aperture, and 4–9 fragile, mostly unbranched appendices slanting upwards from the basal margin.
				Ancyrochitina frankeli Conical body with a cylindrical neck, 4–8 long, delicately bifurcated processes, and variable neck spines ranging from short, thick spikes to long, branched forms.
				Ancyrochitina fruticosa Cylindro-conical vesicle with distinct flexure, bearing 9–15 processes branching up to four times, and a neck and oral margin ornamented with simple to multifurcate and anastomosing spines.
				Ancyrochitina gogginensis
				Ancyrochitina gonzali Pistil- to pear-shaped vesicle with eight dagger-shaped, bifurcated processes and scattered small cones.
				Ancyrochitina gordita Piriform vesicle with short collar and neck, smooth wall, occasional simple or bifurcated processes.
				Ancyrochitina gumersinda Very long neck merging into a short conical body chamber with a smooth wall and simple processes.
				Ancyrochitina gutnica
				Ancyrochitina hamiltonensis Cylindro-conical chitinozoan characterised by a conical chamber with a wide apical angle and distinctive coarse, complexly branching spines over the aperture and base.
				Ancyrochitina iranensis
				Ancyrochitina javieri
				Ancyrochitina kutasii Cylindro-conical chitinozoan distinguished by antler-like, complexly branched basal spines and a ring of oral spines that may branch simply or complexly.
				Ancyrochitina laevaensis
				Ancyrochitina laithia
				Ancyrochitina langei Cylindrical-conoidal vesicle with 2–6 long, simple basal appendages and regularly developed slender spines around the oral tube.
				Ancyrochitina latipes Depressed subconical to subdiscoidal body chamber, broad base bearing 2–6 stout spines, a subcylindrical neck ending in a simple aperture, surface smooth except for occasional spines on neck or collar.
				Ancyrochitina lemniscata
				Ancyrochitina lezaisensis Conical body with six long, looped processes, a tubular neck with aligned complex hairs, and an apical angle of around 55°.
				Ancyrochitina libyensis
				Ancyrochitina longifilosa
				Ancyrochitina longispina
				Ancyrochitina maacki Short conical body, cylindrical neck, and 4–6 short conical appendices, with distinctive apertural spines and minute ornamentation across the vesicle.
				Ancyrochitina merga
				Ancyrochitina minor Small conical species with a cylindrical neck about one-third of the body length, tapering base, and slender, non-bifurcating spines on the vesicle wall.
				Ancyrochitina moldavica
				Ancyrochitina morzadeci Conical chitinozoan with a long cylindrical neck covered in fine hairs and a rounded aboral margin bearing about ten highly branched appendages.
				Ancyrochitina mullinsi
				Ancyrochitina multibrachiata Conical body, cylindrical neck, and 10–12 long, simple appendices at the basal margin, with occasional small spines near the aperture.
				Ancyrochitina multiramosa
				Ancyrochitina narcissa
				Ancyrochitina obesa
				Ancyrochitina ollivierae Medium-sized species with a long cylindrical neck, flared collar, serrated aperture, and 5–6 large hollow appendices curved inward distally.
				Ancyrochitina onniensis
				Ancyrochitina pachycerata Slender chitinozoan species with an ovoid body and cylindrical neck, distinguished by four thick, hooked basal appendages and at least two robust spines at the aperture.
				Ancyrochitina palma
				Ancyrochitina parafragilis
				Ancyrochitina paranaensis
				Ancyrochitina parisi Conical chamber, cylindrical neck comprising one-third to one-half of total length, and robust, simple or bifurcated basal processes.
				Ancyrochitina paulaspina
				Ancyrochitina pedavis
				Ancyrochitina persica
				Ancyrochitina pilosa Pear-shaped chitinozoan with a flat base, 4–6 simple or bifurcated processes, and a cylindrical neck adorned with long, fine hairs.
				Ancyrochitina pitingaense
				Ancyrochitina plurispinosa
				Ancyrochitina porrectaspina
				Ancyrochitina preyi
				Ancyrochitina prima
				Ancyrochitina primitiva
				Ancyrochitina pura
				Ancyrochitina ramosaspina
				Ancyrochitina regularis Globular vesicle, short conical neck and six large, granulate processes curved toward the aperture
				Ancyrochitina reticulata
				Ancyrochitina rumbaensis
				Ancyrochitina sansalvadorensis
				Ancyrochitina silicensis Vesicle cylindro-conical with orally tapering neck, vague flexure, a ring of short, simple spines near flexure, and long, terminally branched basal spines.
				Ancyrochitina simplex Vesicle conical with short flaring neck and smooth wall; basal margin bears eight thick, simple, tapering processes.
				Ancyrochitina spinaperaea
				Ancyrochitina striata Conical, with fine oblique striations forming chevron patterns; short flaring neck bearing tubercles, and thick, fragile basal processes with obscure reticulation.
				Ancyrochitina taouratinensis Small conical vesicle with short cylindrical neck; entire surface covered in short spines; base bears 8–10 thick, distally branched processes arranged perpendicularly to the main axis.
				Ancyrochitina tomentosa Conical chamber with short, highly branched processes and a surface densely covered in strong, flexible hairs, sometimes forked.
				Ancyrochitina tubulosa Conical chamber with short, highly branched processes and a surface densely covered in strong, flexible hairs.
				Ancyrochitina tumida Stout conical chamber with a flat base, short collar, and a crown of long, slender, branched processes.
				Ancyrochitina udayanensis
				Ancyrochitina valladolitana
				Ancyrochitina vanoyenii
				Ancyrochitina varispinosa Highly variable basal and lateral appendages, ranging from simple pointed to coalescent and branched forms.
				Ancyrochitina vikiensis
				Ancyrochitina zagrosiensis
				Ancyrochitina zakeenensis
				Ancyrochitina sp. Specimens which cannot be assigned to established species

Taxonomy

Citation: Ancyrochitina Eisenack, 1955

Taxonomic rank: genus

Basionym: Ancyrochitina Eisenack, 1955

Type species: Conochitina ancyrea Eisenack, 1931

Catalog entries: Ancyrochitina

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Distinguishing features:
Parent taxon (Ancyrochitininae): processes
This taxon: conical to ovoid body bearing a crown of nonanastomosed processes erected from the margin.

NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
They are being edited as the site is developed and comments on them are especially welcome.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): at top of Devonian Period (100% up, 359.3Ma, in Early Carboniferous stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Middle Ordovician Epoch (458.18-471.26Ma, base in Dapingain stage). Data source: Total of ranges of species in this database

Plot of occurrence data:
NB The ranges given for genera and higher taxa are the total ranges of species included in that taxon in this database - so the true total range of the taxon will usually be longer

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested. Parent: Ancyrochitininae

References:

Eisenack, A. (1931). Neue Mikrofossilien des baltischen Silurs. I. Paläontologische Zeitschrift. 13(1): 74-118. gs

Eisenack, A. (1955a). Chitinozoen, Hystrichosphären und andere Mikrofossilien aus dem Beyrichia-Kalk. Senckenbergiana Lethaea. 36(1-2): 157-188. gs

Ancyrochitina compiled by the Sonia Camino, viewed: 13-9-2026

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Short stable page link: https://mikrotax.org/Chitinotax/index.php?id=160027 Go to Archive.is to create a permanent copy of this page - citation notes

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