Pterocladiella caloglossoides Santelices
Creators: name: Boo, Ga Hun
name: Calderon, Martha S.
name: Boo, Sung Min
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Rhodophyta
Florideophyceae
Nemaliales
Pterocladiaceae
Pterocladiella
Pterocladiella caloglossoides

description: Pterocladiella caloglossoides (M.Howe) Santelices (Figs 10–18)   
 Type: — PERU. Lima, Isla San Lorenzo (12°05’23” S, 77°13’26” W), dredged in 2.5 fathoms; Coker 59 P. P. (holotype lost, Renfrew et al. 1989).   
 Specimens observed: — PERU. Paita, Yacila (5°7’48” S, 81°10’09” W), in drift or on intertidal rocks, 14 February 2012, S. M. Boo (CNU 024786 [tetrasporophyte], CNU 024818 [female gametophyte] in CNUK).   
Plants forming turfs up to 0.8 cm tall, yellowish to light red, repent to erect, sometimes complanate throughout (Figs 10, 11); prostrate stolons relatively terete to complanate, with peg-like haptera; erect branches arising in cluster of 2–5 branches on dorsal nodes of stolons where haptera arise, simple or rarely irregularly branched, linear or ribbon-shaped, 190–500 μm in width, approximately 100 μm thick; younger branches lanceolate or acuminate; surface cells in the apical region in very distinct oblique rows, irregularly arranged in the center of erect axes, 7–11 μm in diameter (Fig. 12). Apical cells single, dome shaped.  
Cortex consisting of 3–4 layers of pigmented cortical cells. Medulla containing large colorless cells in a single row, rarely two layers, with translucent rhizines around medullary cells (Fig. 13).  
Tetrasporangial sori arising on ultimate ligulate branches and branchlets, without sterile margins, approximately 280 μm in diameter (Fig. 14); tetrasporangia 15–21 μm × 20–35 μm, arising from inner cortical cells, arranged in v-shaped rows, and cruciately divided (Fig. 15).  
Female plants bearing cystocarps at tips of main axes or branches, protruding on both sides, with a single ostiole (Figs 16, 17); cystocarps with unilocular, ovoid cavity, approximately 220 μm wide and 95 μm thick, with a sterile margin, and producing chains of carposporangia (Fig. 18). Rhizines well-developed on both inner sides of cystocarps. Male plants not observed.  
 Distribution and Habitat: —The type specimens were collected on shells, dredged in 2.5 fathoms at Isla San Lorenzo by Howe. Our specimens from Yacila, Peru occurred on articulated coralline algae in the drift and on small pebbles in the intertidal zone.   
  Identification using mitochondrial cox 1 and plastid rbc L sequences:  —Six sequences were generated in the present study: two cox 1 and two rbc L from P. caloglossoides, and each of cox 1 and rbc L from P. andresii. Pterocladiella caloglossoides and P. andresii differed by 9.7% in cox 1 and 3.9 % in rbc L.   
 The topology of the ML and BI trees was largely congruent; for the concatenated dataset (rbc L + cox 1), the ML tree is shown (Fig. 19). Topologies of the cox 1 and rbc L separately were similar to the concatenated phylogeny but with weaker statistical support (Figs S1, S2). The concatenated tree (Fig. 19) included 42 taxa (2,598 bp) and strongly supported the monophyly of the genus Pterocladiella (99% ML, 1.0 BPP). Pterocladiella caloglossoides from Peru was clearly separated from P. caloglossoides from Australia. Pterocladiella andresii was distinct from other species of Pterocladiella in trees of both individual and concatenated datasets (Fig. 19, Figs S1, S2). Pterocladiella andresii was sister to P. caloglossoides, and this group formed a clade with P. luxurians (Collins) G.H.Boo & K.A.Miller in Boo et al. (2016c: 35337) (100% ML, 1.0 BPP).
description: Published as part of Boo, Ga Hun, Calderon, Martha S. & Boo, Sung Min, 2017, A new marine alga, Pterocladiella andresii sp. nov. (Gelidiales, Rhodophyta) and its relationship to P. caloglossoides from Pacific South America, pp. 139-148 in Phytotaxa 319 (2) on pages 143-144, DOI: 10.11646/phytotaxa.319.2.2, http://zenodo.org/record/13696500