cystocarps. gracilaria: multinucleate tubular nutritive cells to roof, to base gracilariopsis:...
Post on 15-Dec-2015
216 Views
Preview:
TRANSCRIPT
cystocarps
Gracilaria: multinucleate tubular nutritive cells to roof, to base
Gracilariopsis: uninucleate conjunctor cells at base
Gracilariophila(parasite)
Hydropuntia: multinucleatetubular nutritive cells at baseof cystocarp
“TAPPING BACK”
Gracilaria: Gracilariopsis:
Gracilariophila: Hydropuntia:
male structures
in shallow or deep pits
super-ficial
in deep pits, con-necting to vege-tative cells
Gracilaria
Flat species
G. curtissiaeG. intermediaG. smithsoniensisG. galetensisG. hayiG. domingensisG. flabelliformisG. sp.G. lacinulata
Gracilaria smithsoniensis
Dichotomaria aff. marginata
Gracilaria smithsoniensis
Gracilaria smithsoniensis
Gracilaria curtissiae
-thick thallus; thinner lateral blade-like proliferations-often with small “teeth”
G. curtissieae
Gracilaria intermedia
Gracilaria intermedia
Gracilaria galetensis
G. galetensis
Gracilaria hayi
Gracilaria domingensis
Gracilaria domingensis
G. flabelliformis
G. flabelliformis
male structures in shallow pits
Gracilaria sp.
G. lacinulata
Rudimentary key to the external habit of the flat species of Gracilariaceae from Bocas
1. Thallus brown, leathery-thick, with thinner lateral blade-like proliferations; main blades with or without tiny marginal teeth
------------ G. curtissiae
1. Thallus not leathery-thick, of various shapes and colors --- --------------------------------------------------------------------------2
2. Stalk and holdfast hard and cartilaginous, with secondary cortex; blades even-sized, congested, dark wine red-brown --- Gracilaria sp.
2. Stalk and holdfast not hard and cartilaginous -- -----------------------------------------------------------3
3. thallus not pseudodichotomous --------------------4
3. thallus pseudodichotomous -------- ----------------6
4. Main axes with pronounced tooth-like marginal projections ----- ------------------------------------- G. domingensis
4. Blades without tooth-like projections -------------------- 5
5. Blades with leading axis and side branches --------- G. intermedia
5. Blades without leading axes, strap-shaped ------ G. lacinulata
5. No leading axis, axes of same-sized with, narrow apical regions -------------G. smithsoniensis (in part)
5. Leading axis, varying apical region ------ 6
6. Narrow apical branch subdichotomies -----G. flabelliformis
6. Branches with constant diameter 7
7. Branches narrow, with wide angles at tips --- G. smithsoniensis (in part)
7. Branches without wide angles 8
8. Blades with narrow pseudodichotomies----- G.galetensis
9. Blades thin, with broad, round pseudodichotomies--G. hayi
Cylindrical species
Gracilaria cervicornisGracilaria aff. cervicornis
Hydropuntia corneaHydropuntia caudata
Gracilariopsis aff. panamaensis
Gracilaria cervicornis
G. aff. cervicornis
Gracilaria aff. cervicornis
Hydropuntia cornea
Hydropuntia caudata
(=“thinner” G. cornea)
Hydropuntia caudata
top related