Chitinotax - ct_main - Angochitina

Chitinotax - ct_main - Angochitina Chitinotax - ct_main - Angochitina

Angochitina

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Classification: ct_main -> Lagenochitinidae -> Angochitininae -> Angochitina
Sister taxa: Fungochitina, Angochitina, Muscochitina, Ramochitina

Daughter taxa (time control age-window is: 0-800Ma)
				Angochitina amazonica Ovoid chitinozoan with convex base, cylindrical neck, and surface densely covered with small spines.
				Angochitina ambrosi
				Angochitina armata Large vesicle (150–170 µm) with a high ovoid chamber (76–87 µm wide), short, narrow neck (45–58 µm), and a surface densely covered with spines.
				Angochitina avelinoi Subspherical to subovoid vesicle with a long, slightly flared neck and small, simple, randomly distributed spines over the surface.
				Angochitina bernesgae
				Angochitina bifurcata Pyriform chamber with thin translucent wall, short flared neck bearing a long subcylindrical collar, and numerous fine bifid spines on the surface.
				Angochitina cactula Club-shaped vesicle with elongate ovoid chamber, short cylindrical neck, and surface bearing short, sturdy, pointed spines.
				Angochitina caeciliae Pyriform chamber with thin translucent wall, short neck bearing a narrow collar, and surface ornamented with fine spines.
				Angochitina calandraii
				Angochitina calcarata Few, coarse, widely spaced spines (up to 31 µm), blunt to bulbous tips, and smooth oral edge on a cylindro-spherical vesicle.
				Angochitina capillata Small lagenochitiniform chitinozoan, wide aperture, and surface densely ornamented with short spines, strongest at mid-chamber, diminishing toward the aperture.
				Angochitina carvalhoi Robust species with an ovoid chamber and a wide cylindrical neck; straight aperture; vesicle densely covered with fine, hair-like spines (6–10 µm long), wall smooth between spines.
				Angochitina ceratophora
				Angochitina chillkalla Club-shaped vesicle, short cylindrical to sub-conical neck, and surface ornamented by sparse, short, sturdy, pointed spines.
				Angochitina chlupaci Ovoid vesicle with a long, slender neck lacking a shoulder, and sparse, short spines covering the entire vesicle.
				Angochitina communis
				Angochitina comosa Globular–ovoid vesicle with a very long, slender collar and a surface densely covered by fine, soft, unbranched hairs.
				Angochitina crassispina Slender vesicle with a bottle-shaped lower part slightly shorter than the cylindrical neck, sparsely covered with strong, broad-based, mostly curved spines; aperture slightly expanded.
				Angochitina crumena Small, regular spherical chamber, short cylindrical neck, sparse flexuous spines scattered over the vesicle
				Angochitina curvata
				Angochitina cyrenaicensis Elongate vesicle with a median constriction, convex aboral pole, sub-cylindrical neck ending in a large flaring collarette, and spinose ornamentation.
				Angochitina daemoni Ovoid chamber and a cylindrical neck comprising one-third to one-half of total length, straight aperture, and vesicle covered by thin, randomly distributed spines, occasionally multirooted at the base.
				Angochitina densebarbata
				Angochitina dicranum
				Angochitina dimorpha Elliptical body with rounded base, short neck, undifferentiated or slightly flared aperture, and surface bearing scattered strong hairs or tubercles.
				Angochitina echinata
				Angochitina eisenacki
				Angochitina elegantis Bottle-shaped vesicle with long cylindrical neck (½ total length), ovoid body, and surface bearing long spines bifurcated at tips.
				Angochitina elongata
				Angochitina filosa Vesicle with subcylindrical lower part and ellipsoidal upper part, bearing sparse long, thin, hair-like spines, occasionally forked.
				Angochitina flasca Pyriform to subpyriform, short neck with simple aperture, broad, slightly concave base bearing a distinct papilla and an external mucron; surface mostly smooth with scattered short spines.
				Angochitina galarzae Vesicle ovoid- to spherocylindrical, widest at mid-chamber; neck cylindrical, about 0.4 of total length; surface with simple spines 6–10 µm long, spaced 1–5 µm apart.
				Angochitina guangaiensis Cylindrical to long-necked bottle-shaped vesicle, neck indistinct from body, slightly expanded distally; wall with fine spines, tips tapering or bifurcate.
				Angochitina gurupiense Spherical to ovoid vesicle with cylindrical neck widening into a collarette; vesicle sparsely covered with simple hair-like spines.
				Angochitina hansonica
				Angochitina hemeri
				Angochitina heterotricha
				Angochitina hispida Pear-shaped vesicle with flat base, cylindrical neck flaring at aperture; surface bearing scattered hairs or small tubercles, mainly along body ribs.
				Angochitina huronensis Cylindro-spherical, neck flared; long spines (to 31 µm) branching distally over the chamber, neck mostly smooth except for short spines near the oral edge.
				Angochitina hypenetes Cylindrospherical with rounded flexure and shoulder; neck half vesicle length; vesicle densely covered with short simple or branched spines, decreasing toward aperture.
				Angochitina iranica
				Angochitina katzeri Ovoid body, cylindrical neck slightly widened at the aperture, and vesicle wall densely covered with thin, simple spines.
				Angochitina kurnai Oval to egg-shaped chamber, squat sub-cylindrical to sub-conical neck, and sparse, short spines with broad, hollow bases resembling buttress roots.
				Angochitina laevigata Conical to pear-shaped vesicle, short indistinct cylindrical neck, and 2–6 widely spaced dagger-shaped spines on the chamber flanks.
				Angochitina lebaica
				Angochitina liujingensis Bottle-shaped vesicle, cylindrical neck about one-third to two-fifths of total length, widest near base; vesicle wall with sparse fine spines.
				Angochitina loboziaki Elongated ovoid body, cylindrical neck sharply widening at a straight aperture, and minute simple spines restricted to the lower anteapertural part of the body.
				Angochitina longicollis
				Angochitina longispina Cylindro-spheroidal vesicle with neck and flank covered by thin spines; spine length equal to or exceeding neck width.
				Angochitina macclurei
				Angochitina milleri
				Angochitina monstrosa Ovoid to spherical chamber and variable neck; surface vermiculate, ornamented with sparse, randomly distributed thick spongy spines and occasional crests.
				Angochitina mourai Sub-spherical to bulbous chamber with a proportionally short, wide cylindrical neck and a vesicle surface covered initially by minute, easily detached spines.
				Angochitina multiplex
				Angochitina multipodspina
				Angochitina murzukensis
				Angochitina oklahomensis
				Angochitina orientalis Bottle-shaped, cylindrical neck bearing a square collar, and a sparsely spinose wall with bifurcated spine tips.
				Angochitina parnaibaense Elongated ovoid vesicle with a weak flexure, a short cylindrical neck slightly widening toward the aperture, and a wall bearing small, simple spines.
				Angochitina paucispinosa
				Angochitina philippoti Ovoid vesicle merging gradually into an elongated cylindrical neck, ornamented with strong, mostly ramified processes irregularly distributed on the lower half of the vesicle, and a crown of stout spines around the oral end.
				Angochitina piriformis Pear-shaped to ovoid vesicle with a short cylindrical neck, and simple bundled spines mainly concentrated on the neck, with short spines at the base.
				Angochitina plicata Cylindric–conical vesicle with a cylindrical neck, rounded base, and profusely folded wall, bearing scattered simple and branched spines on the chamber and a crown of long, branched spines around the aperture.
				Angochitina podolica
				Angochitina praedensibaculata Ovoid vesicle with a cylindrical neck and a surface densely covered by thick, simple spines up to 10 μm long.
				Angochitina qusaibaensis
				Angochitina ramosus Spheroid vesicle with an elongated cylindrical neck, bearing thick processes that branch at their upper part, distributed on the mid-vesicle and upper neck, accompanied by finer spinous appendages.
				Angochitina ramusculosa
				Angochitina rara
				Angochitina rarispinosa
				Angochitina rathbuni Ovoid vesicle with a short tapering neck ending in a pronounced lip, and a smooth wall ornamented with sparse, short simple spines.
				Angochitina scorzai Sphero-ovoid vesicle with a short, straight neck lacking a collar, and an ornamentation of scarce, slender, long spines irregularly distributed on the vesicle and around the aperture.
				Angochitina seurati
				Angochitina simplex Bottle-shaped vesicle with a long cylindrical neck gradually merging into the body, and slender, elongated spines with tapering or slightly curved tips distributed over the entire vesicle wall.
				Angochitina sinica Species of Angochitina with a consistently elongate, slender tear-drop body chamber (length/width 1:2), short neck (≈½ body length), smooth vesicle wall.
				Angochitina smallii Elongated ovoid vesicle, short cylindrical neck flaring near the aperture, and minute spines covering the wall.
				Angochitina stereosentisa Ovoid vesicle with short indistinct neck and rigid long spines tapering or bifurcating at tips.
				Angochitina stricta
				Angochitina strigosa Slender vesicle with a long cylindrical neck ending in a fenestrate collar, fine spines scattered on the wall.
				Angochitina strigosiuscula
				Angochitina thadeui Ovoid to piriform vesicle with sharp flexure, very long, narrow, cylindrical neck, collar slightly flared; ornamentation of short spines or cones, fading on neck and aboral pole; elongated complex prosome.
				Angochitina toyetae Ovoid body chamber with short neck, wall densely covered by tiny bifurcated to irregularly branched processes; opening not differentiated.
				Angochitina tridigitifera Cylindro-spherical vesicle with conical neck and flexure, ornamented by heteromorphic spines—some simple, others trifurcate, ending in tiny knobs; vesicle otherwise smooth.
				Angochitina tsegelnjuki Ovoid to pear-shaped chamber with short neck ending in flaring collarette; vesicle densely covered by tiny spines and scattered multirooted spines; flexure weak.
				Angochitina turdela Flat-bottomed, pear- to pistle-shaped vesicle with short cylindrical neck; 6–8 simple, distally dichotomous clathrate processes concentrated on flanks; pseudostome straight or crenulate.
				Angochitina valentini
				Angochitina vestita
				Angochitina vigens
				Angochitina warrugang Cylindro-ovoid vesicle with short neck and thin crenulate collar; surface densely covered by short spines, mostly bifurcate or multiramified.
				Angochitina sp. Specimens which cannot be assigned to established species

Taxonomy

Citation: Angochitina Eisenack, 1931 emend. Taugourdeau, 1966

Taxonomic rank: genus

Basionym: Angochitina Eisenack, 1931

Type species: Angochitina echinata Eisenack, 1931

Catalog entries: Angochitina

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Distinguishing features:
Parent taxon (Angochitininae): spiny
This taxon: ovoid to sub-cylindrical body; ornamentation of randomly distributed simple or complex spines.

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 Famennian Stage (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: Angochitininae

References:

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

Taugourdeau, P. (1966). Les Chitinozoaires, techniques d'études, morphologie et classification. Mémoires de la Société Géologique de France. 104: 1-64. gs

Angochitina compiled by the Sonia Camino, viewed: 10-10-2026

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Short stable page link: https://mikrotax.org/Chitinotax/index.php?id=160029 Go to Archive.is to create a permanent copy of this page - citation notes

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