Andinia schizopogon ( Luer 1979: 179 ) Pridgeon & Chase (2001: 251)

Hernández, Alex Gustavo Diaz, Horna, Luis Antonio Ocupa, Godo, Luis Enrique Yupanqui & Wilson, Mark, 2018, A new species of Andinia (Orchidaceae, Pleurothallidinae) from Huánuco, Peru, and the first Peruvian locality for Andinia schizopogon, Phytotaxa 361 (2), pp. 222-232 : 227

publication ID	https://doi.org/ 10.11646/phytotaxa.361.2.7
persistent identifier	https://treatment.plazi.org/id/03A67B57-FFC0-5111-FF3A-FDDFFEBE2713
treatment provided by	Felipe
scientific name	Andinia schizopogon ( Luer 1979: 179 ) Pridgeon & Chase (2001: 251)
status

Treatment

Andinia schizopogon ( Luer 1979: 179) Pridgeon & Chase (2001: 251) View in CoL

PERU: — Cajamarca: Province of Chota, District of Querecoto, Bosque de Protección Pagaibamba ( BPP) Diaz ( HUT!).

Taxonomic notes:— Andinia tingomariana described here ( Figs. 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 ) is remarkable for the resemblance of the flowers to those of members of the former genus Salpistele ( Fig. 6 View FIGURE 6 ), now part of Stelis ( Karremans et al. 2013) . The Salpistele group currently contains five species: Stelis deutroadrianae Shaw (2014: 77 ; syn. Salpistele adrianae Luer & Sijm in Luer, 2009: 18; Fig. 6a View FIGURE 6 ), Stelis brunnea (Dressler) Pridgeon & Chase (2001: 261) (syn. Salpistele brunnea ; Fig. 6b View FIGURE 6 ), Stelis maculata Pridgeon & Chase (2002: 99 ; syn. Salpistele lutea ; Figs. 6c View FIGURE 6 ) and Stelis gnoma Pridgeon & Chase (2002: 99 ; syn. Salpistele parvula ; Fig. 6d View FIGURE 6 ). The floral morphology of the group is unique in Stelis , the flowers exhibiting a longer than usual column, modified with a flattened extension at the apex with a clasping lip in which the lateral lobes project above the column on both sides. Presumably the unique morphology in this group reflects a different pollination syndrome from the other clades of Stelis . Comparing Andinia dielsii ( Figs. 7a View FIGURE 7 , 8b View FIGURE 8 ) and A. pensilis ( Figs. 7b View FIGURE 7 , 8c View FIGURE 8 ) to these Salpistele species, it is not difficult to see why Luer initially placed these two Andinia species in Salpistele . However, A. dielsii and A. pensilis are not phylogenetically closely related to the Salpistele clade of Stelis ( Wilson et al. 2017) .

Floral morphology of the new species, Andinia tingomariana ( Figs. 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 , 8a View FIGURE 8 ) resembles that of the Salpistele group of Stelis ( Fig. 6 View FIGURE 6 ), particularly that of Stelis maculata ( Figs. 6c View FIGURE 6 , 8d View FIGURE 8 ), even more than do those of A. dielsii ( Figs. 7a View FIGURE 7 , 8b View FIGURE 8 ) and A. pensilis ( Figs. 7b View FIGURE 7 , 8c View FIGURE 8 ). Although A. tingomariana does not exhibit the columnar apical dilation seen in A. dielsii , A. pensilis and the Salpistele species, it is possible that the furrowed surface created by the adnate lateral lobes of the lip serves a similar purpose during pollination. Presumably, the similar floral morphologies between the Salpistele group of Stelis and these three Andinia species represent convergent evolution due to similar pollination syndromes. Such convergent evolution has been observed also between Andinia subgenus Brachycladium and Lepanthes , in which pollination through sexual deceit (pseudocopulation by male dipterans) has resulted in similar floral morphology in phylogenetically distant clades ( Wilson et al. 2017). However, to date, no pollination data have been reported for either Salpistele group of Stelis or Andinia subgenus Andinia , so we can do no more than speculate.

The species described here, Andinia tingomariana , has been illustrated previously as Andinia sp. in a regional field guide for Tingo María National Park ( Ocupa Horna et al. 2017) but to our knowledge has not been observed, recorded or illustrated elsewhere. This brings the number of Andinia species recorded for Peru to nine ( Table 2). Among these species Andinia schizopogon is tentatively recorded for Peru by Luer (1994) “Without collection data, flowered in cultivation at Heidelberg Botanical Garden, Senghas 799 ( HEID).”, however, no record of this collection can be found at HEID (Sack, pers. comm.). Here we report the first confirmed location of A. schizopogon in Peru, in the regions of Cajamarca ( Fig. 9 View FIGURE 9 ) and San Martín. To date, only two species from subgenus Aenigma have been recorded for Peru, the aforementioned A. schizopogon and the recently described A. sunchubambensis Doucette & Janovec (2016 : figs. 1 – 3; homotypic synonym A. wayqechensis Martel, Collantes, Maire & Thoerle 2016: 291 ). However, it would be surprising if the species Andinia dalstroemii ( Luer 1984: 52) Pridgeon & Chase (2001: 251) , Andinia pentamytera ( Luer 1994: 58) Pridgeon & Chase (2001: 251) and Andinia pogonion ( Luer 1994: 61; Pridgeon & Chase 2001: 251), which occur in the neighboring Ecuadorian provinces of Loja and Zamora Chinchipe, do not also occur in Amazonas and Cajamarca.