T he genus Deiregyne Schltr. sensu Garay (1982) encom- passes 14 species restricted to the major mountain ranges ofMexico and adjacent Guatemala (Salazar, 2003; Soto et al., 2007; Soto and Salazar, 2012). Although there has been considerable controversy regarding the typifi cation and cir- cumscription of this genus (e.g. Catling, 1989 contra Szla- chetko, 1995), recent molecular phylogenetic analyses have shown that, as lectotypifi ed and delimited by Garay (1982), Deiregyne corresponds to a strongly supported, monophyle- tic group (Salazar and Ballesteros-Barrera, 2010; Salazar et al., 2011). Those analyses have also identifi ed the genus Di- chromanthus Garay as the sister of Deiregyne, and these two genera in turn belong in a more inclusive clade with the ge- nera Schiedeella Schltr. and Spiranthes Rich. s.str. Except for three hummingbird-pollinated speciesof Dichromanthus with odorless, tubular, red or orange fl owers, all thespeciesof this lineage have fragrant, campanulate, white, green or yellow fl owers. All these features conform to a syndrome of
Color after about 15 years of preservation in 70% ethanol.—Rostral cream with heavy suffusion of dark pigment on anterior surface; pale stripes on canthal borders merge on front of snout, bordering posterior part of rostral and anterior part of internasals; parietals with a small pale dot medially; pale stripes on head continuous with pale paravertebral stripes on body; upper lips white-cream; each suprala- bial scale with dark pigment distributed irregularly on lower half; infralabials white- cream with dark pigment distributed irregu- larly, extending posteriorly from chin region and fading at level ofthe 10th ventral scale; dorsal coloration cream-white with vertebral and lateral dark-brown stripes along body; dark vertebral stripe three and two half scales wide on most of body, starting at internasal scales and covering most of head dorsum, four and two half scales wide on nape; three scales between vertebral and lateral stripes; lateral stripes two and two half scales wide on nape, narrowing posteriorly and through most of body to one and two half scales wide; all scales on pale paravertebral stripes and sides of body
when 3, two pointing toward the apex and one deflect- ed, this last being slightly longer, stiff needle-like, sligh- ly thicker than the radial spines, 7-13 mm long, whitish, brown to black, darkening to apex, later gray, all straight; radial spines 10-15, acicular, slender, white with reddish tips, radiate around the areole, 5-10 mm long; flowers zygomorph-tubular, close to the apex, 30-42 × 12-15 mm at the apex, more or less apically campanulate, all flower parts scarlet red; sepals in three series, the upper lanceo- late, 6-8, 20-25 × 5-7 mm, apex entire, irregularly rounded, incurved outwards; the middle segments 4-6, located at middle ofthe tube, 4-12 × 4-5 mm, incurved apically out- wards, the lower segments squamiform, 2-5 mm long and wide, appressed to the tube; filaments 40-60, 25-32 mm long, scarlet red, protruding over the upper sepals and these in turn clearly surpassed by the pistil, anthers 1 mm long, 0.4 mm wide, dark red; stigma pale pink, pistil 28-38 long, 0.5 mm wide, stigma lobes lanceolate-oblong, 5-6, 1.0 mm × 0.4 mm, fimbriate, glutinose, scarlet red; ova- ry ovoid, 2.5-3 mm diameter, ovary walls 0-8-1 mm thick; fruit ovoid, dehiscent by a lateral slit, initially green, later reddish-brownish, juicy, 7-9 × 6-8 mm, dried perianth seg- ments sometimes remaining attached; seed pear-shaped, 1.3 × 0.8 mm, 0.65 mm thick, black; hylum micropylar re- gion subbasal, oval-shaped; testa with tabular-concave roundish to isodiametric cells whose sunken central area is roundish, the non-sunken peripheral wall portions are structured in a weakly wart-like manner, the anticline bor- ders on them are barely recognizable, sunken in uneven honeycomb form.
Tribulus L., and Zygophyllum L. (Zygophyllaceae) Povolný (2002b). Thespecies is widely distributed in Europe, tropical Africa, Australasia, and Indo-Malaysia, and has been reported from Jamaica and Mexico in theNew World (Huemer and Karsholt 2010; Nazari 2017). Landry and Roque-Albelo (2010) placed O. subdiminutella in Ephysteris Meyrick based on three male and female specimens from Galapagos Islands. They identified thespecies based on the figures in Povolný (2002b). However, it should be noted that there are differences in the figures ofthe male genitalia among the contributions of Povolný (2002b), Huemer and Karsholt (2010), and Landry and Roque-Albelo (2010). Due to the confusion in the identity of O. subdiminutella (see Huemer and Karsholt 2010), I assign the Chilean specimens to “O. near subdiminutella.” The Chilean specimens were collected with ultraviolet light traps in four different localities in Atacama and Coquimbo regions where they are associated with the interior desert and coastal scrubland.
Gutierrezia Lag. is a genus fromthe Americas, with a disjunct distribution in North and South America. In North America, 18 species inhabit in xerophytic or halophytic areas in the Central-West ofthe United States and South ofMexico (Nesom, 2006). On the other hand, 16 species occur in southern South America from Bolivia to extreme southern Argentina and Chile. Particularly, twospecies grow in Bolivia (Solbrig, 1966; Hind, 2011; Beck et al., 2014), six in Chile fromthe region I (Tarapacá) to the XII (Magallanes) (Zuloaga et al., 2008), and 12 in Argentina, mainly on the West fromthe border with Bolivia up to Tierra del Fuego archipelago (Zuloaga et al., 1999; 2008; Sancho & Viera Barreto, 2014). Recently, three newspecies were described from
Twonewspeciesof Iridaceae are described and illustrated, both collected in the state of Oaxaca, Mexico. Sisyrinchium planicola Ceja & Cholewa has blue flowers with a white eye and grows abundantly in the flood plains of Llano de las Flores. Tigridia mariaetrinitatis Espejo & López-Ferrari, only known fromthe type locality in Rancho Progreso, municipality of Chalcatongo de Hidalgo, belongs to the subgenus Hydrotaenia and has the flowers erect, brilliant yellow in their base, the outer tepals white lilac with purple spots and the inner tepals yellow with purple spots.
Abstract: Twonewspeciesofthe genus Squatina (Chondrichthyes: Squatinidae) fromthe Gulf ofMexico. Two undescribed speciesofthe genus Squatina, caught by bottom-trawl during the OGMEX VIII, IX and PROBEMEX II oceanographic cruises were compared with S. dumeril Lesueur, 1818, the only well known spe- cies fromthe northern Gulf ofMexico. The collections were made off Tamaulipas, Veracruz and Tabasco. The descriptions ofthenewspecies refer to morphology, coloration pattern and dorsal fin shape and size. An English description of each species is included. Some specimens erroneously assigned to S. dumeril are deposited in Mexican collections. With these twonewspecies, besides S. californica Ayres, 1859 and S. dumeril , the number of documented speciesof this genus in Mexico ascends to four, and a total of five are known fromthe western Atlantic. A key is provided for their identification. Rev. Biol. Trop. 54 (3): 1031-1040. Epub 2006 Sept. 29. Key words: Chondrichthyes, Squatina, Gulf ofMexico, key.
The tribe Coreopsideae, Asteraceae, is a monophyletic lineage with 24 genera and 600 species (Panero & Funk 2002, Panero 2007, Crawford et al. 2009). The tribe has a cosmopolitan distribution, although its greatest diversity is found in the Americas. Two diverse genera of Coreopsideae are Bidens L. and Cosmos Cav. which are frequently confused, and as a consequence several synonymies exist between them (e.g. Hemsley 1881, Sherff 1929, 1932, Melchert 1975, 1990, 2010a-b, Melchert & Turner 1990). A recent case is the proposal of Hind (2013) to transfer Cosmos herzogii Sherff to Bidens. Based on this work and on a recent systematic study of Cosmos (Vargas-Amado et al. 2013; Castro-Castro et al. 2014, Castro-Castro 2015) and field work we support this last decision. Bidens herzogii, thenew combination, is endemic to Eastern Bolivia and it grows on the Cerrado or Cerradense Occidental biogeographic provinces (Morrone 2001 and Navarro & Ferreira 2009, respectively). This region is distinguished by its unique flora, singular abiotic characteristics, and several biological endemisms (Suárez 2000, Wood et al. 2011, Pozo et al. 2013, Fig. 1A).
MATERIAL AND METHODS Field work included surveys, plant col- lections and market visit in theValleyfrom 1994 to date; voucher specimens are depos- ited at the Herbario Metropolitano (UAMIZ) ofthe Universidad Autónoma Metropolitana- Iztapalapa. Other sources of information included herbaria consultations (CODAGEM, ENCB, IEB, IMSSM, MEXU and UAMIZ). Because most ofthe information about the uses of Mimosa species is disseminate, the revi- sion of historic documents, and ethnobotanical, floristic and ecological studies was done. The Mexican Plants Ethnobotanical Information Data Base (Banco de Información Etnobotánica de Plantas Mexicanas, BADEPLAM) ofthe Jardín Botánico, Instituto de Biología, Universidad Nacional Autónoma de México, was also consulted.
Cifuentes, P.R., González, E.S.S., Zaragoza-Caballero, S., Vega-Vera, F.J., 2002, Insectos del Cretácico Superior de Coahuila y del Oligoceno inferior de Puebla (resumen), en XXXVII Congre- so Nacional de Entomología y South Annual Meeting ofthe Southwestern Branch ofthe Entomological Society of Ameri- ca, Reunión Conjunta: Guanajuato, México, Sociedad Mexica- na de Entomología, 505-507.
Ekman as well as Ignatz Urban (1848-1931), who processed and published much of Ekman's scientific result, passed away almost simultane- ously and the specimens were never studied in detail. These specimens, now distributed in the herbaria of Stockholm (S), Kew (K) and Geneve (G), were recently brought to our attention and it is clear that both entities deserve species rank. Both are members ofthe A. lateralis complex as defined by Campbell (1983), using size and number of pollen grains compared between the sessile versus the pedicellate spikelets, besides a general mor- phological resemblance to A. lateralis.
Brailovsky, H. y Mayorga, C. (1997) An analysis ofthe genus Stenomacra Stål with description of four newspecies, and some taxonomic rearrangements (Hemiptera: Heteroptera; Largidae). Journal oftheNew York Entomological Society, 105(1-2): 1-14. Buzzetti, F. y Zettel, H. (2007) Rhagovelia sehnali sp. n. (Insecta: Heteroptera: Veliidae) from
Baccharis acaulis grows in humid, often saline, soil for which it needs to present some mechanisms to counter- act stress conditions (Lieth and Mochtchenko, 2003; Teillier and Becerra, 2003; Ruthsatz, 2012). Frequently, salt toler- ance is associated with tolerance to water stress; howev- er, if salt toxicity is the main cause ofthe effect of salinity, salt tolerance is not necessarily linked with water stress tolerance (Villagra and Cavagnaro, 2006); this could be the mechanism of B. acaulis, since it would be the most import- ant for the ecological success of this species. Furthermore, this salt stress tolerance could be an adaptive factor in the niche differentiation of B. acaulis and its capacity to grow in salt soil, since the habitats where B. acaulis grows are the unique place with highest level of water in the dry puna.
A newspeciesofthe hypoptopomatine genus Hisonotus (Loricariidae) is described from a small tributary ofthe upper rı´o Uruguay basin near the border between Uruguay and Brazil. Thenewspecies can be distinguished from all other congeners by the following combination of characters: (1) presence of serrae along distal two thirds of posterior margin of pectoral-fin spine (versus serrae absent, posterior margin smooth); (2) odontodes along anterior margin of snout biserially arranged, dorsad and ventrad series separated by narrow odontode-free area covered by pad of soft tissue; (3) caudal peduncle short (27–34% SL, versus . 34% SL) and deep (13–15 % SL, versus , 13% SL); (4) eye large (15–19% HL, versus , 13% HL); and (5) caudal-fin pigmentation, when well defined, dark brown with a pair of whitish blotches on upper and lower lobes. The significance ofthe distribution ofthenewspecies is discussed relative to the degree of endemism of other fish groups in the Uruguay basin.
Hemipenes (Fig. 4). The right hemipenis ofthe paratype DHMECN 6753 of Imantodes chocoensis was removed, fully everted and expanded (Fig. 4). The organ is bulbous and relatively long, 11.2 mm in length, and when adpressed to the outside ofthe tail it extends fromthe cloaca to the sixth subcaudal scale. The organ is longer than wide (width 46% of length), unilobed, symmetrical, calyculate, capitate, and arched towards the sulcal side. The sulcus spermaticus is simple, linear, semicentripetal, and thin, demarcated by thick bordering tissue at the base, particularly at the anterior bor- der, and ending on the surface ofthe capitulum facing medially. The capitulum is orna- mented with papillated calyces, spinulated proximally. The capitulum, approximately 45% the length ofthe hemipenis, is slightly demarcated by a groove, more prominent on the sulcal side and joining the sulcus spematicus. In the asulcate side the base ofthe capitulum has more prominent spines. Truncus covered by large spines, on the sulcate