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Published In: Öfversigt af Finska Vetenskaps-Societetens Förhandlingar 52A(7): 1. 1. 1910. (Öfvers. Finska Vetensk.-Soc. Förh.) Name publication detailView in Biodiversity Heritage Library

Project Name Data (Last Modified On 2/16/2011)
Acceptance : Accepted
Project data     (Last Modified On 2/16/2011)

Tuerckheimia guatemalensis is a very small species with flexuose-spreading, linear-lanceolate leaves. It is known only from the type locality. Its stems are short, and unlike the other Central American species a central strand is absent. There are often multiple papillae on the upper leaf cells of this species, however, the cells can also be mammillose and at times the cells on the dorsal surface appear to be nearly smooth. This species is very similar to the genus Trichostomum which differs from it in having a stem central strand, usually excurrent costa, typically thin-walled strongly differentiated basal leaf cells, and papillae scattered over the cell lumina. Molendoa sendtneriana can have leaf cell papillae similar to those of T. guatemalensis, but it differs in having lateral perichaetial, more heterogeneous upper leaf cells, and longer, broader leaves.

The sexual condition of the species could not be accurately evaluated because of the small size of the type collection. The remnants of a peristomial basal membrane have been attributed to T. guatemalensis (Britton 1913, Bartram 1949, Zander 1978c, 1993). My examination of its capsules found a rudimentary basal membrane, 2–3 cells high that is lightly ornamented by vertical rows of papillae.

Illustrations: Brotherus (1910, Pl. 1); Bartram (1949, Fig. 43 A–D); Zander (1993, Pl. 14 8–13). Figure 88.
Distribution in Central America: GUATEMALA. [Department not given]: Türckheim (NY).
World Range: Central America.


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Tuerckheimia guatemalensis Broth., Oefvers. Förh. Finska Vetensk.-Soc. 52A (7): 2. 1910.

Protologue: Guatemala. Livingston, im Küstengebiete des östlichen Guatemala, auf Gestein (H. v. Türckheim, in Herb. Levier) (NY). 

Plants small, light-green. Stems 1–3 mm high, not branched, central strand absent, partial hyalodermis at times present; rhizoids red-brown, smooth. Leaves evenly spaced, spreading when wet, flexuous-spreading when dry, plane or concave, linear-lanceolate, 2.0–2.5 mm long; apices narrowly acute, subulate; margins plane, occasionally bistratose, crenulate by leaf cell papillae; costae percurrent, guide cells and two stereid bands present, ventral surface cells enlarged, smooth, dorsal surface cells small, thick-walled; upper cells homogeneous, quadrate to oblate, 6–10 x 8 μm, becoming short-rectangular to rectangular below mid-leaf, 12–26 x 8–10 μm, walls firm to thick, pluripapillose or mammillose; basal cells near costa enlarged. Dioicous (?). Perichaetia terminal, perichaetial leaves enlarged, somewhat ovate at base, acuminate. Setae 5–8 mm long, yellow to yellow-brown, smooth. Capsules exserted, cylindrical, lightly furrowed when dry, 0.5–1.0 mm long, yellowish brown; stomata not seen; operculum not seen; peristome rudimentary, present as a low, 2–3 cell, papillose membrane just exceeding the capsule mouth. Spores 8–12 μm, papillose. Calyptra not seen.



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