Cryptolophocolea explanata Vana & Crand.
Creators: name: Thouvenot, Louis
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Marchantiophyta
Jungermanniopsida
Jungermanniales
Lophocoleaceae
Cryptolophocolea
Cryptolophocolea explanata

description: Cryptolophocolea explanata (Mitt.) Váňa & Crand. -Stotl.
(Fig. 2)
Phytotaxa 202: 69 (Söderström et al. 2015).
—
Lophocolea explanata Mitt., Flora Vitiensis: 404 (Mitten 1871 [1873]). — Chiloscyphus explanatus (Mitt.) J.J.Engel & R.M.Schust., Nova Hedwigia 39: 414 (Engel & Schuster 1984 [1985]).
—
Type: Samoa. Powell s.n. (lecto-, selected by Váňa et Crandall-Stotler [in Söderström et al. 2015], NY [NY00965738], not seen; isolecto-, G [G00121761]!).
FURTHER SPECIMENS EXAMINED. — New Caledonia. South Province, Mts. Koghis, in forest, V-VI.1905, Etesse s.n., ex herb. E. G. Paris nr 13 (G s.n.).
DISTRIBUTION IN NEW CALEDONIA. — South Province. Known from a single collection in Mts Koghis by Etesse in 1905.
TOTAL RANGE. — Pacific Islands, occurs also in Samoa (type locality).
DESCRIPTION (BASED ON THE NEW CALEDONIAN SPECIMEN) Autoecious.
Habit
Plants medium sized, wet shoots up to 2.10 mm wide when flattened.Leaves obliquely spreading,convex to nearly explanate.
Leaves
In medium parts of stems, leaves 0.70-0.90 mm long, 0.45- 0.65 mm wide at base, 0.20-0.25 at apex, long ovate to narrowly trapezoid when flattened, both margins nearly symmetrically convex above the base becoming nearly straight to slightly concave subapically, apices usually obliquely truncate, with a sharp tooth at both angles and rare additional short teeth on ventral margins, dorsal margins entire, decurrent, not connivent.
Cells
Leaf cells hexagonal, 24-36 µm wide, 24-50 µm long, thin walled, trigones small, acute.
Underleaves
Hardly wider than the stem, 0.30-0.40 mm, usually as wide as long, narrowly connate to the nearest leaves on both sides, rounded-quadrate to slightly obovate, bifid up to ¼ down with rather short triangular acuminate lobes and lunate sinus, margins convex, recurved near base, with one tooth on both sides, teeth shorter or like apical lobes.
Gametangia
Gynoecia terminal on normal-leaved branches or main shoots, bracts ovate lanceolate, asymmetric, 2.20 mm long, 0.90 mm wide, canaliculate, margins laciniate, bracteoles oblong, 1.60 mm long, 1.20 mm wide, margins laciniate; perianths subcylindrical, 3-carinate, keels broadly winged, ciliate along the whole length, mouth densely laciniate; androecia in long spikes with more than 15 pairs of bracts, intercalary or terminal on normal leaved branches, bracts 1.00 mm long, 0.50 mm wide, smaller than the normal leaves and saccate at dorsal base, antheridia stalk biseriate.
COMMENTS
Lophocolea explanata was reported from New Caledonia byParis (1906) based on a specimen collected by Etesse. No voucher has been found in the herbarium of E. G. Paris at REN, but a duplicate is kept in G (see also Stephani’s correspondence to Paris, 9.VII.1905 [Rennes 1 University Library]) matching the isolectotype of L. explanata in G and confirms the presence of this species in New Caledonia. Stephani (1906) described the species as being dioecious, likely owing to the absence of male shoots in the type, but the New Caledonian specimen is autoecious.
description: Published as part of Thouvenot, Louis, 2023, A taxonomic revision of the Lophocoleaceae Vanden Berghen (Marchantiophyta) of New Caledonia, pp. 1-60 in Cryptogamie, Bryologie 20 (1) on pages 8-10, DOI: 10.5252/cryptogamie-bryologie2023v44a1, http://zenodo.org/record/7822577