[Tex/LaTex] How to draw an unrooted phylogenetic tree

Question

I have a problem! I want to draw an unrooted phylogenetic tree like this one:

(Image taken from commons.wikimedia)

I've tried with the package newicktree, but without success! Anyone can help me please? If it is drawable without newicktree package it's ok too!
Thanks!

    \begin{figure}[h!]
    \centering
    \begin{newicktree}
        \setunitlength{4cm} \nobranchlengths \nodelabelformat{}
        \contemporarytips[30] \drawtree{ (((A,B)X,C)Y,D)Z;}
    \end{newicktree}    
    \caption{Example of phylogenetic tree.}
    \label{fig:phyltree}
\end{figure}

Answer 1

Maybe this helps a little:

\documentclass[12pt]{article}
\usepackage{newicktree}
\begin{document}
\begin{figure}[h!]
  \centering
  \begin{newicktree}
    \setunitlength{4cm} \nobranchlengths \nodelabelformat{}
    \contemporarytips[30] \drawtree{ (((A,B)X,C)Y,D)Z;}
  \end{newicktree}
  \caption{Example of phylogenetic tree.}
  \label{fig:phyltree}
\end{figure}
\begin{newicktree}
  \straightbranches\nobranchlengths\nonodemarkers
  \lefttree\setunitlength{2mm}
  \drawtree{(((thing 1:5, thing 10:5):3, thing 9:6):4, thing 2:7):8, ((thing 7:3, thing 8:3):10, thing 3:10):5,
  (thing 6:20, (thing 4:1, thing 5:2):10):1;}
\end{newicktree}

\end{document}