Species
Hallopora tolli Bassler, 1911
Synonymy list
1911     Hallopora tolli, new species — Bassler , pp. 333, fig. text fig. 209
1941     Hallopora tolli  — Fritz , pp. 564, fig. text fig.1
1953     Hallopora tolli Bassl. — Modzalevskaya , pp. 105
1967     Hallopora cf. tolli  — Bork et Perry , pp. 1382, fig. 176:2-6
1978     Hallopora tolli Bassler, 1911 — Astrova , pp. 70
2002     Hallopora tolli Bassler, 1911 — Pushkin , pp. 424, fig. 6e-i
2008     Hallopora cf. tolli Bassler, 1911 — Buttler et al. , pp. 13, fig. 2.6
2013     Hallopora tolli Bassler, 1911 — Pushkin & Pushkina , pp. 16, fig. 2:3-4
Selection of related publications
Pushkin, V. 2002. Middle Ordovician bryozoa from the Podlasie-Brest Depression (Belarussian part): suborders Ceramoporina, Esthonioporina, Amplexoporina, Halloporina.  Geological Quarterly   46,   4,   411-434.
Männil, R. M. 1959. Questions of stratigraphy and bryozoans of the Ordovician of Estonia. pp. 1-852.  Institut Geologii Akademii Nauk Estonskoi SSR. 
Modzalevskaya, E. A. 1953. Trepostomaty ordovika Pribaltiki i ih stratigraficheskoe znachenie.  Trudy Vsesoûznogo Naučno-Issledovatel'skogo Geologo-Razvedočnogo Instituta (VNIGRI)         91-167.  Gostoptehizdat. 
Bassler, R. S. 1911. The Early Paleozoic Bryozoa of the Baltic Provinces.  Bulletin of the US National Museum   77,      1-382.
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Classification
References based on distribution
- Bassler, 1911b Keila Keila Stage
- Bassler, 1911b Kukruse Jõhvi Substage
- Pushkin, 2002 Butkunai 241 borehole 677 - 677
- Pushkin, 2002 Ludza 15 borehole 628.1 - 628.1
- Pushkin, 2002 Serebryaniki borehole, Tver Oblast 999.8 - 1043.7
- Modzalevskaya, 1953