M. J. Cano

Molecular phylogeny of Pottiaceae (Musci) based on chloroplast rps4 sequence data

Comparative sequencing of the chloroplast rps4 gene was used to reconstruct the phylogenetic relationships within the family Pottiaceae (Musci). The results confirm that Ephemerum spinulosum, Splachnobryum obtusum, Goniomitrium acuminatum and Cinclidotus fontinaloides are clearly positioned within the Pottiaceae and that Hypodontium dregei is not a member. At subfamily level, the data support the subfamily Pottioideae as being a monophyletic clade. The Trichostomoideae are probably paraphyletic. Neither the subfamily Chionolomideae, represented in this study by Pseudosymblepharis schimperiana, nor the subfamily Erythrophyllopsoideae, represented by both known species, Erythrophyllastrum andinum and Erythrophyllopsis fuscula, are supported by the sequence data. The Timmielloideae should be excluded from the Pottiaceae. The Merceyoideae, represented in this study by Scopelophila cataractae, might form a sister clade to all other Pottiaceae, but their position is not fully resolved. At the genus level, Barbula is clearly polyphyletic since Barbula bolleana and Barbula indica appear in a clade clearly separated from Barbula unguiculata. Pottiopsis caespitosa and Leptobarbula berica are placed within the Trichostomoideae. Likewise, the genera Gymnostomum and Anoectangium are excluded from the Pottioideae and placed within the Trichostomoideae. Leptophascum leptophyllum is closely related with Syntrichia;Aloina is not closely related to Tortula or Crossidium. Evidence of a clade within the Pottioideae, formed of Leptodontium and Triquetrella, is provided.

Tortula and some related genera (Pottiaceae, Musci): phylogenetic relationships based on chloroplast rps4 sequences

Abstract. According to chloroplast rps4 sequence data the genus Syntrichia forms a monophyletic clade clearly separated from Tortula, while Pottia is shown to be polyphyletic and the Rhynchostegiae species (with rostrate lid) are very similar to Tortula. Crossidium is probably polyphyletic. The close affinity of Desmatodon, Stegonia, Pterygoneurum and some of the species of Phascum with Tortula is confirmed by the molecular data.

Contribution to the bryophyte flora of Morocco: terricolous and saxicolous bryophytes of the Jbel Bouhalla

Abstract The terricolous and saxicolous bryophytes of the Jbel Bouhalla (Rif Cordillera, Morocco) have been studied. This mountainous system, characterized by basic geology, contains the largest and best conserved forest of Abies pinsapo subsp. maroccana in Northern Africa. The catalogue is composed of 121 taxa, of which 108 are mosses and 13 liverworts. Of these, nine are new to the African continent (Acaulon mediterraneum, Claopodium whippleanum, Gymnostomum lanceolatum, Hedwigia stellata, Orthotrichum cupulatum var. baldacci, Schistidium brunnescens subsp. griseum, S. crassipilum, Scorpiurium sendtneri, Seligeria acutifolia), Eurhynchium schleicheri is new for mainland Africa, and seven are new records for Morocco (Barbula enderesii, Bryum dunense, Campyliadelphus chrysophyllus, Fissidens dubius, Hedwigia ciliata var. leucophaea, Pleuridium acuminatum, Pseudoleskeella catenulata).

Contribution to the bryophyte flora of Morocco: the Jbel Toubkal

Abstract The bryophyte flora of the Jbel Toubkal, included in the Toukbal National Park (Morocco), is catalogued. Only 12 bryophytes had been reported previously from this mountain, the highest in northern Africa. As a result of this study, the catalogue consists of 101 taxa (95 mosses and six liverworts), of which nine species are new for Africa (Amblyodon dealbatus, Brachythecium collinum, Grimmia mollis, Hyocomium armoricum, Pseudoleskeella tectorum, Schistidium cinclidodonteum, Syntrichia bolanderi, Syntrichia calcicola, Tortula guepinii), three species are newly reported for northern Africa (Bryum klinggraeffii, Bryum muehlenbeckii, Schistidium rivulare) and another six are new for Morocco (Bryum mildeanum, Cirriphyllum crassinervium, Fissidens rivularis, Plagiochila porelloides, Rhynchostegiella teneriffae and Weissia levieri).

A revision of the moss genusCrossidium (Pottiaceae) with the description of the new genusMicrocrossidium

A world revision of the genusCrossidiumJur. recognizes 11 species, which are described and discussed in the context of important taxonomic characters. An identification key is provided.C. asirenseFrey & Kürschner is reduced to synonymy withC. davidaiCatcheside, and the geographical range ofC. laevipilumTher. & Trab. is extended to Europe. Phylogenetic trends are interpreted on the basis of two main evolutionary lines associated with the presence or absence of hyaline hair-points on the leaves. A twelfth species is transferred toMicrocrossidiumGuerra & Cano, gen. nov., asM. apiculatum (Magill)Guerra & Cano, comb. nova, because of differences in stem anatomy, peristome configuration, and spore morphology.

Didymodon erosus sp. nov. (Musci, Pottiaceae) from the Iberian Peninsula

Didymodon erosus is described and illustrated as a new species from two localities in Spain (Iberian Peninsula), growing on calcareous rocks. It is characterized mainly by its markedly erose and papillose-crenulate in the upper middle leaf margins and rhizoidal tubers underground or on rhizoids in the lower part of the stem.

Didymodon sicculus sp. nov. (Bryopsida, Pottiaceae) from the Iberian Peninsula

Didymodon sicculus sp. nov. is described and illustrated from southeastern Spain where it occurs on saline and gypsiferous soils. The new species is similar in habit to D. luridus Spreng., but differs in having leaves with smaller upper cells, rectangular basal cells, margins recurved from near the apex to the base, and quite papillose laminal cells. For the last several years, we have been studying the bryophyte flora and vegetation of southeastern Spain, and many samples of a taxon macroscopi- cally similar to Didymodon luridus Spreng. were collected in the provinces of Alicante and Almeria. We have concluded that these samples correspond to an undescribed taxon. DIDYMODON SICCULUS Cano, Ros, Garcia-Zamora, & J. Guerra sp. nov. (FIG. 1-20) Species dignoscenda phyllidiis papillosis, quorum api- cales cellulae sunt 6-14 ipm latae, parietibus incrassatae atque nonumquam bistratae, cellulae autem basilares, longe rectangulae.

A new point of view on the taxonomy ofPottia starckeana agg. (Musci, Pottiaceae)

A new taxonomic treatment is proposed for thePottia starckeana species complex. The peristome development is not considered to be a useful feature to separate the taxa. On the basis of spore morphology only two species are accepted:P. starckeana, with spores wavy in outline, andP. davalliana, with variously-shaped and developed processes on the spores.Pottia starckeana var.brachyoda is reduced to synonymy withP. starckeana; P. conica andP. commutata are treated as synonyms ofP. davalliana. The speciesP. mutica, P. affinis, P. salina, P. microphylla, P. texana, andP. arizonica (included var.mucronulata) are considered taxa of doubtful affinity, as they have spore features intermediate between the two spore types established for the group. The identity ofP. appertii andP. recurvifolia has not been elucidated because the type material has been destroyed.

Crossidium seriatum (Pottiaceae, Musci) New to Europe

Crossidium seriatum Crum & Steere is reported new to Europe on a specimen from Spain. The species is illustrated and notes are given on its ecology and distribution. Seven of the species of the genus Crossidium Jur. (Pottiaceae) have leaves with many or few papillae: Crossidium aberrans Holz. & Bartr., known from North America (Mexico, Arizona, British Columbia) (Delgadillo 1975; Holzinger & Bartram 1924; McIntosh 1989), Europe (France, Spain) (Pierrot 1986; Ros & Guerra 1986), Southwestern Asia (Saudi Arabia and Jordan) (Frey & Kiirschner 1988a); C. asirense Frey & Kiirschner, known from Saudi Arabia (Frey & Kiirschner 1984); C. davidai Catcheside, known from Australia (Catcheside 1980); C. rosei Williams, known from South America (Peru) (Williams 1915) and Canada (British Columbia) (McIntosh 1989) and probably conspecific with the former (McIntosh 1989); C. geheebii (Broth.) Broth., known from New Zealand, Australia (Delgadillo 1975), and Southwestern Asia (Sinai) (Frey & Kiirschner 1988a); C. deserti Frey & Kiirschner, known from Saudi Arabia (Frey & Kiirschner 1987), and C. seriatum Crum & Steere, known at the moment from California (Crum & Steere 1958) and Arizona (Zander 1977). While studying material of this genus with the aim of carrying out a revision of the taxa in the Mediterranean region, we collected a sample in Albacete (Spain) that, based on its foliar morphology, was identified as Crossidium seriatum. We have observed some morphological differences between the original description and the sample from Spain: plant size [stems 1.5(-2) mm in height]; cell size (upper lamina cells 8-20 Ocm in length; median cells 9-22 ~cm in length); and hyaline hair-point 0.16-0.88 mm in length (FIG. 1-12). Studied material.--SPAIN. ALBACETE. Murcia-Albacete road, crossroads on the way to Agramon, UTM: XH2060, 19.IV. 1991, Ros et al. (MUB 4265). We also studied isotypes of C. seriatum from DUKE, NY, and us. Habitat. -The sample collected in the Iberian Peninsula was found in very dry gypsiferous soil, with sparse nitrified grass vegetation, approximately 500 m above sea level. The major part of the taller vegetation of these soils consists of thickets with Helianthemum squamatum, Herniaria fruticosa, Lepidium graminifolium, Lygeum spartum, Ononis tridentata, and Teucrium libanitis. The average annual precipitation is approximately 300 mm and the average temperature 14.9*C, which corresponds to a semiarid ombroclimate (Alcaraz & SfanchezG6mez 1988). Crossidium seriatum appears in these areas associated with Aloina bifrons (De Not.) Delg., Crossidium crassinerve (De Not.) Jur., Didymodon aaronis (Lor.) Guerra, and Tortula revolvens (Schimp.) G. Roth. Distribution. Crossidium seriatum might be considered a very rare species. However, it may be more frequent than is known at present and perhaps only seems to be rare due to its small size, hardly visible during the dry season. There are only two localities known in the American continent (Crum & Steere 1958; Zander 1977) and one in Europe (Spain), that reported here (Fig. 13). This type of specific disjunction between the Mediterranean region and the arid zones of southwestern North America is common among xerophytic mosses of arid and semiarid zones (steppe climates) of the Northern Hemisphere (Schofield 1988). The majority of these species grow in the short periods of rainfall and are elusive during the dry period. Like C. seriatum, there are numerous species of arid circummediterranean zones that show this type of disjunction-Aloina bifrons (De Not.) Delg., Crossidium aberrans Holz. & Bartr., Desmatodon guepinii B. & S., Phascum vlassovii Laz., Pseudocrossidium revolutum (Brid.) Zander, and Pterygoneurum koslovii Laz.-and they all may be considered Triassic FIGURES 1-4. Crossidium seriatum. 1. Leaves. 2. Leaf cross sections, showing costal variation. 3. Median cells. 4. Basal cells. (MUB 4265.) 0007-2745/92/280-283

Identity of North African endemic bryophytes, 1

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