Trichia

Bo, Zhang & Yu, Li, 2016, Identification of a new species, Trichia macrospora, and a newly recorded species, T. flavicoma (Myxogastria), in China, Phytotaxa 258 (2), pp. 179-184 : 183

Key to Trichia (including only species with a stalk)

1 Peridium bearing a central papilla on the outer surface of each platelet........................................................................... T. papillata

1 Peridium not papillate.........................................................................................................................................................................2

2 Substipitate or sessile sporocarp.........................................................................................................................................................3

2 Distinctly stalked sporocarp ...............................................................................................................................................................4

3 Capillitium bearing 5–6 smooth spiral bands, spores 11–13 μm in diam ...................................................................... T. conglobata

3 Capillitium bearing 2 smooth spiral bands, spores 10–11 μm in diam ............................................................................. T. brummea

4 Fused stalk forming clusters of 2–20 or more ....................................................................................................................................5

4 Stalk not fused ....................................................................................................................................................................................6

5 Persistent at the base as a shallow cuplike calyculus ...................................................................................................... T. elaterensis

5 Does not form a cuplike calyculus at the base of the sporotheca..................................................................................... T. flavicoma

6 Sporocarp distinguished by a cup and an operculum .................................................................................................. T. crateriformis

6 Sporocarp without a cup and an operculum .......................................................................................................................................7

7 Larger sporocarp, almost exceeding a height of 1.5 mm ....................................................................................................................8

7 Smaller sporocarp, not exceeding a height of 1.5 mm .....................................................................................................................12

8 Smaller spores, not exceeding 9 μm in diam......................................................................................................................................9

8 Larger spores, exceeding 9 μm in diam............................................................................................................................................10

9 Sporocarps about 1.4–1.7 mm, dark red-brown to nearly black ................................................................................... T. microspora

9 Sporocarps about 2.5–3.2 mm, dull yellow or olive yellow.......................................................................................... T. brimsiorum

10 Spores 9–11 μm in diam....................................................................................................................................................... T. botrytis

10 Spores 11–13μm in diam..................................................................................................................................................................11

11 Peridium yellow, single and dehiscing at the apex............................................................................................................ T. decipiens

11 Peridium consisting of two closely-connected layers and dehiscing along thin reticulate bands ............................................ T. erect

12 Larger spores, about 17–19 μm in diam. ....................................................................................................................... T. macrospora

12 Smaller spores, not exceeding 15 μm in diam..................................................................................................................................13

13 Long stalk, 2–2.5 times the diameter of the sporocarp.......................................................................................................... T. munda

13 Short stalk, not exceeding 2 times the diameter of the sporocarp....................................................................................................14

14 Pointed and tapered elaters, with free ends ......................................................................................................................................15

14 Elaters with free ends, without points ..............................................................................................................................................16

15 Branched capillitium, swellings at intervals, bearing long or short side branches and spores 10–12.5 μm in diam. .......................... ................................................................................................................................................................................. T. heteroelaterum

15 Capillitium decorated with a reticulum, with short free ends and globes to ellipsoidal spinose nodules............................ T. nodosa

16 Single, membranous peridium........................................................................................................................................... T. antactica

16 Double, inner membranous, outer cartilaginous peridium ................................................................................................. T. subfusca