Phytophthora pseudocryptogea

Name and publication

Phytophthora pseudocryptogea Safaiefarahani, Mostowfizadeh, Hardy, and Burgess (2015)

Safaiefarahani B, Mostowfizadeh-Ghalamfarsa R, Hardy GE StJ, and Burgess TI. 2015. Re-evaluation of the Phytophthora cryptogea species complex and the description of a new species, Phytophthora pseudocryptogea sp. nov. Mycol Progress 14: 1–12.


from Safaiefarahani et al. (2015)


MB 811590


refers to morphological and physiological resemblance of this species to Phytophthora cryptogea


Type: AUSTRALIA, Western Australia, Fitzgerald River National Park from roots of dying Isopogon buxifolius, September 2006; collected by Department of Parks and Wildlife. MURU471

Ex-type: CBS 139749 = VHS 16118

Sequences for Ex-type: Phytophthora pseudocryptogea isolate VHS 16118 = ITSrDNA KP288376, β-tubulin KP288392, Elicitin KP288410, HSP90 KP288426, NADHI KP288360, CoxI KP288342

Ex-type in other collections

CBS 139749 = VHS 16118 = CPHST BL 183 (Abad)

Molecular identification

Voucher sequences for barcoding genes (ITS rDNA and COI) of the ex-type (see Molecular protocols page)

Phytophthora pseudocryptogea isolate VHS 16118 ITS rDNA KP288376
Phytophthora pseudocryptogea isolate CPHST BL 183 (= VHS 16118) COI MH477756

Sequences of selected specimen

Phytophthora pseudocryptogea isolate CPHST BL 139 (= P1380 WPC) = ITS rDNA MG865572, COI MH136964

Sequences for ex-type in other sources
Position in ITS phylogenetic tree

Clade 8a

Morphological identification

Colonies and cardinal temperatures

Colony morphology after 7 days at 20 °C was rosoid to chrysanthemum on V8A, CA, MEA, and PDA, and uniform on CMA. Minimum growth temperature 3°C, maximum 35°C, and optimum 25°C.

Asexual phase

Sporangia nonpapillate, persistent, terminal, ovoid, ellipsoid to pyriform, 43.6 ± 5.9 × 27.4 ± 3.3 μm, length/width ratio is 1.59. Sporangiophores simple and unbranched. Hyphal swellings globose to irregular. Chlamydospores absent.

Sexual phase

Heterothallic. Oogonia globose and averaged 34 ± 3.8 μm diam. Antheridia amphigynous. Oospores aplerotic to nearly plerotic, 30.1 ± 4.1 μm diam.

Most typical characters

All morphological features of P. pseudocryptogea overlap with those of P. erythroseptica, P. cryptogea and P. sp. kelmania (except that P. erythroseptica is homothallic).

Specimen(s) evaluated

Phytophthora pseudocryptogea CBS 139749 (Centraalbureau von Schimmelcultures)
Phytophthora pseudocryptogea SUC 620 (Iran)
Phytophthora pseudocryptogea SUC 633 (Iran)
Phytophthora pseudocryptogea VHS 5380 (Vegetation Health Service, Department of Parks and Wildlife, Western Australia)
Phytophthora pseudocryptogea DDS 3612 (Vegetation Health Service, Department of Parks and Wildlife, Western Australia)

Hosts and distribution

Distribution: Asia (Iran), Australia, South America (Ecuador)
Substrate: roots, soil
Disease note: root rot
Host: Banksia cirsioides (Proteaceae), Solanum melongena (Solanaceae), Xanthorrhoea preissii (Asphodelaceae)

Retrieved February 01, 2018 from U.S. National Fungus Collections Nomenclature Database.

Additional info:
Hosts: Isopogon buxifolius

Additional references and links

  • Phytophthora DATABASE: Phytophthora pseudocryptogea
  • EPPO-Q-bank: Phytophthora pseudocryptogea
  • SMML USDA-ARS: Phytophthora pseudocryptogea
  • EPPO Global Database: Phytophthora pseudocryptogea
  • CABI Invasive Species Compendium: Phytophthora pseudocryptogea
  • Encyclopedia of Life (EOL): Phytophthora pseudocryptogea
  • Index Fungorum (IF): Phytophthora pseudocryptogea
  • Plantwise Knowledge Bank: Phytophthora pseudocryptogea

Fact sheet authors

Treena Burgess, Ph.D., Centre for Phytophthora Science and Management, School of Biological Sciences and Biotechnology, Murdoch University, Australia; Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Beltsville Laboratory, United States of America