Taxus globosa, the Mexican yew, is an evergreen shrub and one of the eight species of yew. The Mexican yew is a rare species, only known to be found in a small number of locations in eastern Mexico, Guatemala, El Salvador and Honduras,Taxus globosa, Schlectendahl, 1838, found here retrieved on March 10, 2007 and is listed as an endangered species. The Mexican yew is a shrub that grows to an average height of 4.6m. It has large, sharp light green needles growing in ranks on either side of its branches. There are several projects in order to produce Paclitaxel (an anti-tumor agent) around the world, but Mexican yew has not been as well studied because its low production of Taxol (Bringi et al., 1995) Bringi V, Prakash G. K., Prince C. L., Schubmehl B. F., Kane E. J., Roach B.. 1995. “Enhanced production of taxol and taxanes by cell cultures of taxus species”. Patent number (USA): 5407816, Assigned to: Phyton Catalytic Inc. by in vitro plant cell cultures. Few researchers focus their work on this species, the team leader on Taxus globosa S. is perhaps that of BarradasBarradas, D. D. Ma., Hayward, J. P. M., Mata, R. M., Palmeros, S. B., Platas, B. O. B. J., Velázquez, T. R. F.. (2010). Taxus globosa S. cell lines: Initiation, selection and characterization in terms of growth, and of baccatin III and paclitaxel production. Biocell, 34 (1), 1-6. at Veracruz Institute of Technology (Instituto Tecnológico de Veracruz).
No narrative description available for this taxon yet.
A DNA barcode is a short, standardised stretch of genes that works like a fingerprint — enough to tell one species from another. Below is the molecular trace Taxus globosa has left across the world's sequence archives.
At a glance
DNA specimens9
Marker genes3
GenBank sequences10
eDNA detections8
Countries1
The DNA barcodea real sequence read deposited for this species
★ the standard DNA barcode for this group — the short region actually read to tell this species apart. The rest are extra genes sequenced along the way.
★matK4★rbcL6★ITS2
plant barcodefungal barcode
07Deep time~16.7 Ma lineage
How far back this lineage goes — and how we know. Everything here is measured in Ma, short for “mega-annum”: millions of years ago. The chart reads left to right like a calendar of the Earth, from the deep past on the left to today at the right edgetop to bottom like a core drilled through the Earth, from the deep past at the top down to today at the bottom.
At a glance
DNA clock origin16.7 Ma TimeTree
When this lineage existed
How to read this: the coloured strip along the bottomdown the left is the geological calendar — the standard epochs (Pliocene, Pleistocene…) every museum uses, shown so you can see which chapter of Earth's history this lineage lived in. This lineage is a young one, so the strip is zoomed in to epochs — the finer subdivisions inside a period. The orange marker is the DNA clock: DNA accumulates mutations at a roughly steady rate, so comparing this species' DNA with its relatives estimates when the lineage split off — independently of any fossil.
DNA clock origin
08Occurrence & distribution
Record type345 records
Wild obs. + sensor73
Museum / vouchered266
Cultivated / captive1
Other5
Range
Area of Occupancy AOO736 km²
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy88% within 1 km
≤100 m 22≤1 km 15≤10 km 2>10 km 3
42 georeferenced · 31 without coordinates
Open the mapobservation + sensor73
Museum / Voucheredphysical evidence
Backed by a physical specimen — a herbarium sheet, sample or voucher held in a collection. “Vouchered” means supported by material evidence, not just an observation.
Coordinate accuracy92% within 1 km
≤100 m 142≤1 km 5≤10 km 11>10 km 1
159 georeferenced · 107 without coordinates
Open the institutions mapphysical evidence266
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Coordinate accuracy
no georeferenced coordinates · 1 records without
Open the mapnot free-living1
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
10Collections & institutions
Holding institutions27 of 41 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Durango, MX
83
Mexico City, MX
31
Saint Louis, US
18
Chapingo, MX
14
Juriquilla, MX
11
Linares, MX
11
Paris, FR
7
Kew, GB
7
Mexico City, MX
6
Ann Arbor, US
5
Mexico City, MX
4
Escuela Agrícola Panamericanalocation not on record
4
Guasave, MX
4
Universidad Nacional Autónoma de Honduraslocation not on record
3
Giardini Botanici Hanburylocation not on record
3
Universidad Nacional Autonoma de Mexico, Instituto de Biologialocation not on record
3
Bronx, US
3
University of Stellenboschlocation not on record
3
Riverside, US
2
Flagstaff, US
2
University of Oxfordlocation not on record
2
Tuxtla Gutiérrez, MX
2
Austin, US
2
Chicago, US
2
Wuzhou, CN
1
BMlocation not on record
1
Stockholm, SE
1
Llocation not on record
1
Chongqing Museumlocation not on record
1
Cornell Universitylocation not on record
1
Puebla, MX
1
Zapopan, MX
1
Ciudad de México, MX
1
Tapachula, MX
1
Embrapa Amazônia Oriental, Ministry of Agriculturelocation not on record
1
PHlocation not on record
1
San Jose State University, Museum of Birds and Mammalslocation not on record
1
MeiseBGlocation not on record
1
Bloomington, US
1
Edinburgh, GB
1
Fort Worth, US
1
41 institutions · 249 of 266 vouchered records shown · 17 without an institution code
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
09Environmental DNA8 detections
Where the DNA of Taxus globosa was picked up in samples of water, soil or air — nobody saw the organism, only its DNA left behind. A trace is a clue that the species was near, not a confirmed sighting.
Signal
Detections DNA found8
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 8 detections have coordinates
Open the map1 country0
How strong is each trace?
DNA read depthRead counts were not reported for this species — the map shows presence only, not how strong each trace was.
Modelled climatemodelled
−15°Ctemperature across detection sites+40°C
Temperature median12.6 °C 11.1–14.0
Seasonal swing summer↔winter5.70 °C
Max temp (day)20.1 °C 18.5–21.7
Min temp (night)5.40 °C 4.40–6.30
Precipitation11.7 mm/mo 10.7–12.7
Air humidity53.1 % 51.5–54.6
Moisture balance-95.8 mm/mo -112–-79.2
Vapour deficit689 Pa 602–776
Wind speed2.70 m/s 2.60–2.90
Cloud cover35.1 % 31.0–39.2
CHELSA 1981–2010, ~9 km grid, at location & month of 2 detection points · median with p10–p90 · reflects where sampling happened, not only the true niche
How to read this: each dot is one detection of this species' DNA in an environmental sample. The confidence meter weighs how many independent studies and places back up the signal — one detection in one study is a hint; many across several studies is solid. Records dated before 2008 (when eDNA methods began) are treated as likely mislabeled and left off the map.
WikipediaWikimedia Foundation5 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility345 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI8 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics9 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
WikidataWikimedia Foundationstructured facts↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗