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12 results for “rostral appendage”
Fig. 6 in A new species of the genus Ceratophora Gray, 1835 (Reptilia: Agamidae) from a lowland rainforest in Sri Lanka, with insights on rostral appendage evolution in Sri Lankan agamid lizards
Fig. 6. Ceratophora ukuwelai sp. nov. in life in-situ. (A) Female holotype (NMSL 2020.05.01) in dorsolateral view; (B) male specimen (not collected) in dorsolateral aspect showing rostral appendage; (C) female paratype (NMSL 2020.05.02) in dorsal view. Photos by Suranjan Karunarathna and Sanjaya Kanishka.
Fig. 2 in A new species of the genus Ceratophora Gray, 1835 (Reptilia: Agamidae) from a lowland rainforest in Sri Lanka, with insights on rostral appendage evolution in Sri Lankan agamid lizards
Fig. 2. Bayesian inference tree of Draconinae lizards derived from the analysis of 1,084 bp of ND2 gene sequences. For voucher specimen information and GenBank accession numbers see Table 1. Numbers at tree nodes correspond to BI PP/ML BS support values, respectively; a black circle at a node indicates it is strongly supported (BI PP> 0.95; ML BS> 75%). Colors of clades and locality numbers correspond to those in Fig. 1. Photos by Sanoj Wijayasekara and Sanjaya Kanishka.
Fig. 7 in A new species of the genus Ceratophora Gray, 1835 (Reptilia: Agamidae) from a lowland rainforest in Sri Lanka, with insights on rostral appendage evolution in Sri Lankan agamid lizards
Fig. 7. Habitat of Ceratophora ukuwelai sp. nov. at type locality in Salgala Forest, Kegalle District, Sri Lanka. (A) General view of Salgala Forest; (B) microhabitat of the new species inside the dense forest with good canopy cover and thick leaf litter. Photos by Suranjan Karunarathna.
Fig. 1 in A new species of the genus Ceratophora Gray, 1835 (Reptilia: Agamidae) from a lowland rainforest in Sri Lanka, with insights on rostral appendage evolution in Sri Lankan agamid lizards
Fig. 1. Currently known distribution of Ceratophora ukuwelai sp. nov. and other localities for Ceratophora species examined in the present study. For locality numbers see Table 1. Colors of icons correspond to those in Fig. 2. Star denotes the type locality of the new species (Salgala Forest, Kegalle District, Sri Lanka).
Fig. 3 in A new species of the genus Ceratophora Gray, 1835 (Reptilia: Agamidae) from a lowland rainforest in Sri Lanka, with insights on rostral appendage evolution in Sri Lankan agamid lizards
Fig. 3. Bayesian chronogram for Draconinae resulting from BEAST analysis of 1,084 bp of ND2 gene sequences. Node values correspond to estimated divergence times (in Ma). Blue bars correspond to 95% confidence intervals.
Fig. 4 in A new species of the genus Ceratophora Gray, 1835 (Reptilia: Agamidae) from a lowland rainforest in Sri Lanka, with insights on rostral appendage evolution in Sri Lankan agamid lizards
Fig. 4. Relative rostral appendage (RAL/SVL) evolution among members of the Sri Lankan agamids (genera Ceratophora, Lyriocephalus, and Cophotis). See Table 2 for RAL/SVL data. Colors of branches correspond to average RAL/SVL values in males (A) and females (B); thumbnails show profiles of the respective lizard species (not to scale). Photos by Sanoj Wijayasekara, Sanjaya Kanishka, and Suranjan Karunarathna.
Fig. 5 in A new species of the genus Ceratophora Gray, 1835 (Reptilia: Agamidae) from a lowland rainforest in Sri Lanka, with insights on rostral appendage evolution in Sri Lankan agamid lizards
Fig. 5. Morphology of Ceratophora ukuwelai sp. nov. holotype, adult female (NMSL 2020.05.01). (A) Head in dorsal view; (B) head in ventral view; (C) head in lateral view; (D) heterogeneous scales on dorsal surface of trunk; (E) keeled ventral scales; (F) lateral surfaces of trunk showing heterogeneous scales; (G–H) dorsal and ventral surfaces of femur showing sharp spines; (I) subdigital lamellae on manus; (J) subdigital lamellae on pes; (K) hexagonal-shaped subcaudals. Photos by Suranjan Karunarathna.
Fig. 8 in A new species of the genus Ceratophora Gray, 1835 (Reptilia: Agamidae) from a lowland rainforest in Sri Lanka, with insights on rostral appendage evolution in Sri Lankan agamid lizards
Fig. 8. Syntypes of Ceratophora aspera Günther, 1864 in lateral view: BMNH.1946.30.51 (female, above) and BMNH.1946.30.52 (male, below). Photo by Colin McCarthy (BMNH).
Data from: Use of a rostral appendage during social interactions in the Ecuadorian Anolis proboscis
The use of sexually selected characters in inter- and intra-sexual interactions has long been of interest to evolutionary biologists. Recently, a distinction between sexually selected traits as ornaments versus weapons has been advanced. We investigated the behaviour of an enigmatic lizard with a prominent sexually dimorphic trait in an effort to describe whether the trait was the product of sexual selection and further whether it functioned as a weapon or an ornament. The subject of our study was the Ecuadorian proboscis anole (Anolis proboscis), a slow-moving cryptic species endemic to the north-western slopes of the Andes in Ecuador. Males, but not females, of this species bear a rostral appendage that has been described as an exaggerated trait resulting from sexual selection. However, a thorough description of the use of the rostral appendage in social interactions is lacking. Here, we describe social interactions of this species during 11 male–female courtships and mating interactions, as well as three male–male agonistic interactions. We describe four types of displays by males, many involving the rostral appendage. We found that the rostral appendage is used as an ornament in social displays but not as a weapon in combat. We also show that, unlike other lizards with rostral appendages, male A. proboscis hatch with this structure already developed.
Figure 2 in Use of a rostral appendage during social interactions in the Ecuadorian Anolis proboscis
Figure 2. (a) Displays performed by male and female (fifth mating). (b) Beginning of chasing. Female approaches and runs past the male in the opposite direction to that in which he was facing. (c) Male bite and proboscis lifting. (d) Male stops biting and lower the rostral appendage after copulation begins. (e) Biting attempt from MIN5 (left) to MIN10 (right). (f) Proboscis used in physical contact, MIN5 (left), MIN10 (right). (g) Jaw locking between MIN27 (left) and MIN29 (right). (h) Body flattening against the branch and colour changing of MIN21 during approach and displays of MIN20. Photo credits: Diego Quirola.
Figure 1 in Use of a rostral appendage during social interactions in the Ecuadorian Anolis proboscis
Figure 1. (a) Newly hatched Anolis proboscis male. (b) A. proboscis juvenile. (c) A. proboscis adult male. (d) A. proboscis adult female. Photo credits: Santiago Ron (a), Diego Quirola (b–d).
Data from: Use of a rostral appendage during social interactions in the Ecuadorian Anolis proboscis
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